A physicist is testing a brand new projectile launcher in her lab that is designed to launch human skulls in a vacuum. She can adjust the angle to whatever she wants. She tests it by launching a skull at an angle of 70 degrees above the horizontal at a velocity of 18.0m/s at ground level.
A. What are the x and y components of the skull's initial velocity?
B. How fast is the skull traveling at its peak height?
C. How long until the skulls hits the floor?
D. What is the range of the skull?
Answers
A physicist is trying out a new machine in her lab. It can launch human skulls in a space without air. She can change the way it points. She tries it by shooting a skull at the ground. She shoots it up at a 70-degree angle and it goes 18 meters per second.
A. What is the speed of the skull when it goes up and when it goes sideways?
B. How fast is the skull going when it is as high as it can go?
C. How much time passes before the skull hits the ground?
D. How far away does the skull go?
To answer the questions related to this physics problem, you can use the following formulas:
The x-component of the initial velocity (vx) can be found using the formula: vx = v0*cos(theta), where v0 is the initial velocity magnitude (18.0 m/s) and theta is the launch angle (70 degrees).
The y-component of the initial velocity (vy) can be found using the formula: vy = v0*sin(theta).
The time it takes for the skull to hit the ground (t) can be found using the formula: t = (2*vy)/g, where g is the acceleration due to gravity (9.81 m/s^2).
The maximum height reached by the skull (h) can be found using the formula: h = (vy^2)/(2*g).
The range of the skull (R) can be found using the formula: R = (vx*vy)/g.
A. To find the x and y components of the skull's initial velocity, we use the following equations:
Vx = V cosθ
Vy = V sinθ
where V is the magnitude of the velocity, θ is the launch angle, Vx is the velocity in the x-direction, and Vy is the velocity in the y-direction.
Given V = 18.0 m/s and θ = 70 degrees, we have:
Vx = 18.0 m/s × cos(70 degrees) ≈ 5.53 m/s
Vy = 18.0 m/s × sin(70 degrees) ≈ 17.5 m/s
Therefore, the x and y components of the skull's initial velocity are 5.53 m/s and 17.5 m/s, respectively.
B. At the peak height, the skull's vertical velocity (Vy) will be zero. We can use the following equation to find the speed at the peak height:
Vy = V sinθ - gt
where g is the acceleration due to gravity (approximately 9.81 m/s^2).
Setting Vy to zero and solving for V, we have:
V = gt/sinθ ≈ 36.5 m/s
Therefore, the skull is traveling at a speed of approximately 36.5 m/s at its peak height.
C. To find the time it takes for the skull to hit the floor, we can use the following equation:
y = Vyt - 0.5gt^2
where y is the initial height of the skull (assumed to be zero), Vy is the initial velocity in the y-direction, g is the acceleration due to gravity, and t is the time.
Setting y to zero and solving for t using the quadratic formula, we get:
t = [Vy + sqrt(Vy^2 + 2gy)]/g
Substituting the values we have, we get:
t = [17.5 m/s + sqrt((17.5 m/s)^2 + 2 × 9.81 m/s^2 × 0)]/9.81 m/s^2 ≈ 1.79 s
Therefore, the skull will hit the floor after approximately 1.79 seconds.
D. To find the range of the skull, we can use the following equation:
x = Vx × t
Substituting the values we have, we get:
x = 5.53 m/s × 1.79 s ≈ 9.89 m
Therefore, the range of the skull is approximately 9.89 meters.
ChatGPT
A. To find the x and y components of the skull's initial velocity, we first need to break the initial velocity vector into its x and y components. The initial velocity vector can be represented as:
v₀ = 18.0 m/s at an angle of 70 degrees above the horizontalThe x component of the initial velocity can be found using:
v₀x = v₀cosθwhere θ is the angle above the horizontal. Substituting the values, we get:
v₀x = 18.0 m/s cos(70°) = 5.60 m/sThe y component of the initial velocity can be found using:
v₀y = v₀sinθSubstituting the values, we get:
v₀y = 18.0 m/s sin(70°) = 17.22 m/sTherefore, the x and y components of the skull's initial velocity are 5.60 m/s and 17.22 m/s, respectively.B. At the peak height, the vertical component of the velocity becomes zero. Therefore, we can use the equation:
v² = v₀² - 2gywhere v₀ is the initial velocity, g is the acceleration due to gravity, and y is the vertical displacement. At the peak height, y is equal to:
y = (v₀y)² / (2g)Substituting the values, we get:y = (17.22 m/s)² / (2*9.81 m/s²) = 15.00 mUsing this value of y and the initial velocity, we can find the speed of the skull at the peak height:
v = √(v₀x² + 2gy)Substituting the values, we get:
v = √((5.60 m/s)² + 2*(9.81 m/s²)*(15.00 m)) = 22.15 m/sTherefore, the skull is traveling at a speed of 22.15 m/s at its peak height.C. To find the time it takes for the skull to hit the floor, we can use the equation:
y = v₀yt - 1/2gt²where t is the time taken for the skull to hit the floor. At the point of impact, y is equal to zero. Substituting the values, we get:
0 = (17.22 m/s)t - 1/2*(9.81 m/s²)t²Solving for t, we get:
t = 3.53 sTherefore, it takes 3.53 seconds for the skull to hit the floor.D. To find the range of the skull, we can use the equation:
x = v₀x * tSubstituting the values, we get:
x = (5.60 m/s) * (3.53 s) = 19.77 mTherefore, the range of the skull is 19.77 meters.
Related Questions
The total resistance ZT in a circuit is given by Z sub t equals quantity z sub 1 times z sub 2 end quantity over quantity z sub 1 plus z sub 2 end quantity comma where z1 = 70 + 40i and z2 = 50 − 35i. What is the total resistance in standard form? Round to three decimal places.17.394 − 4.487i40.607 − 5.442i40.748 − 5.461i41.061 − 5.461i
Answers
From the information given,
ZT = (Z1Z2)/(Z1 + Z2)
Z1 = 70 + 40i
Z2 = 50 - 35i
Z1Z2 = (70 + 40i)(50 - 35i)
Z1Z2 = 3500 - 2450i + 2000i - 1400i^2
Recall, i^2 = - 1
Z1Z2 = 3500 - 2450i + 2000i - 1400(-1)
Z1Z2 = 3500 - 2450i + 2000i + 1400
Z1Z2 = 4900 - 450i
Z1 + Z2 = 70 + 40i + 50 - 55i = 70 + 50 + 40i - 35i
Z1 + Z2 = 120 + 5i
ZT = (4900 - 450i)/(120 + 5i)
We would rationalize the denominator by multiplying by (120 - 5i)/(120 - 5i). It becomes
ZT = (4900 - 450i)/(120 + 5i) x (120 - 5i)/(120 - 5i)
ZT = (4900 - 450i)(120 - 5i)/(120 + 5i)(120 - 5i)
(4900 - 450i)(120 - 5i) = 588000 - 24500i - 54000i + 2250i^2
(4900 - 450i)(120 - 5i) = 588000 - 24500i - 54000i + 2250(- 1)
(4900 - 450i)(120 - 5i) = 588000 - 24500i - 54000i - 2250
(4900 - 450i)(120 - 5i) = 585750 - 78500i
(120 + 5i)(120 - 5i) = 14400 - 600i + 600i - 25i^2
(120 + 5i)(120 - 5i) = 14400 - 25i(-1)
(120 + 5i)(120 - 5i) = 14400 + 25
(120 + 5i)(120 - 5i) = `14425
ZT = (585750 - 78500i)/14425)
ZT = 40.607 - 5.442i
A car going 75 mph (35 m/s) hits a wall and comes to a stop. It takes 1.25 s for the car to come to a stop. What is the acceleration of
the car?
Answers
Answer:
A car traveling at 22 m/s comes to an abrupt halt in 0.1 second when it hits a tree. ... A ball is thrown up at 35m/s, to get to the highest point takes
Explanation:
on which factors does friction depend ?
Answers
Answer:
It depends on 2 factors
the nature of the materials
the normal force.
Explanation:
It depends on 2 factors
the nature of the materials that are in friction and the treatment that they have followed. This factor is expressed by a numerical value called the coefficient of friction or friction.
the force exerted by one body on the other, that is, the normal force.
Please help me with this (20 points)
Answers
Answer:
1. troposphere
2. troposphere (still)
3. The most abundant gas in the atmosphere is nitrogen, with oxygen second. Argon, an inert gas, is the third most abundant gas in the atmosphere.
4.The stratosphere is where you'll find the very important ozone layer. The ozone layer helps protect us from ultraviolet radiation (UV) from the sun. In fact, the ozone layer absorbs most of the UV radiation the sun sends to us. Life as we know it wouldn't be possible without this layer of protection.
5. It contains the ozone, which protects Earth from the sun's radiation. Why aren't there many meteors in the troposphere? They burn up before they reach the troposphere.
Explanation:
1.The troposphere is the atmospheric layer closest to the planet and contains the largest percentage (around 80%) of the mass of the total atmosphere. Temperature and water vapor content in the troposphere decrease rapidly with altitude.
2.The layer closest to Earth's surface is the troposphere, reaching from about seven and 15 kilometers (five to 10 miles) from the surface. The troposphere is thickest at the equator, and much thinner at the North and South Poles.
3. Explained in the answer.
4. Explained in the answer.
5. Explained in the answer.
Which has a higher reduction potential — silver or iron?
Answers
Answer:
Fe
Explanation:
Dựa vào dãy hoạt động hóa học của kim loại
How do I predict the product of a nuclear reaction.
Answers
In the 1st reaction, ⁴²K undergoes beta decay. Therefore the resulting element will have 1 more proton than ⁴²K.
Therefore, the mass number of the new particle is 42.
The atomic number of potassium is 19.
Therefore the atomic number of the new element will be 19+1=20.
Therefore the new element is Calcium.
Therefore the reaction is,
\(^{42}_{19}K\rightarrow^0_{-1}e+^{42}_{20}Ca_{}^{}\)What does "Earth Overshoot Day?" mean?
Answers
In Physics, it marks the date when humanity’s demand for ecological resources (fish and forests, for instance) and services in a given year exceeds what Earth can regenerate in that year.
why might orbiting telescope be problematic for the radio portion of the electromagnetic spectrum
Answers
Orbiting telescopes can provide many advantages for observations in the visible and other parts of the electromagnetic spectrum, they can present challenges for radio observations.
Orbiting telescopes can be problematic for the radio portion of the electromagnetic spectrum due to several reasons:
1. Interference from Earth-based sources: Radio signals can be easily disrupted by interference from sources on Earth such as cell phone towers, television transmitters, and other radio transmitters. These sources can cause interference and noise in the radio signals received by the telescope.
2. Atmosphere: Radio signals can also be affected by the Earth's atmosphere, particularly by water vapor, which can absorb or scatter radio waves. Orbiting telescopes are above the atmosphere and can therefore avoid this issue.
3. Limited bandwidth: The bandwidth available for radio telescopes is limited, and orbiting telescopes have to share this bandwidth with ground-based telescopes. This can lead to a limited amount of data that can be transmitted to Earth.
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In an A.C circuit current leads voltage by phase π/2 then circuit is
Answers
Answer:
capacitive
Explanation:
In a capacitive circuit, current is proportional to the derivative of the voltage. For a sinusoidal excitation, this means current is at the highest level when voltage is increasing through zero. That is, current leads the voltage.
In a young's double-slit experiment, light of wavelength 500 nm illuminates two slits which are separated by 1 mm. the separation between adjacent bright fringes on a screen 5 m from the slits is:_____.
Answers
In a young's double-slit experiment, light of wavelength 500 nm illuminates two slits which are separated by 1 mm. The separation between adjacent bright fringes on a screen 5 m from the slits is 0.25cm.
What is Thomas Young's double-slit experiment?Young's experiment was founded on the idea that if light had wave-like properties in nature, it would act similarly to the ripples and waves on a body of water. When two opposing water waves collide, they should respond in a certain way to either strengthen or obliterate one another.
Principle of Young's double-slit experiment :The fundamental idea of interference is that when two waves collide, a new wave with a higher, lower, or identical amplitude is created.
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I understand the question you are looking for :
In a Young's double-slit experiment, light of wavelength 500 nm illuminates two slits that are
separated by 1 mm. The separation between adjacent bright fringes on a screen 5 m from the
slits is:
A. 0.10 cm
B. 0.25 cm
C. 0.50 cm
D. 1.0 cm
E. none of the above
A pure gold ring with a volume of 1.91 cm
3
is initially at 10.0
∘
C. When it is put on, it warms to 27.3
∘
C. Part A How much heat did the ring absorb? (density of gold =19.3 g/cm
3
)
Answers
The amount of heat absorbed by the gold ring can be calculated using the formula:
Q = mcΔT
where Q is the heat absorbed, m is the mass of the gold ring, c is the specific heat capacity of gold, and ΔT is the change in temperature.
To find the mass of the gold ring, we can use the formula:
\(\[V = \frac{m}{ρ}\]\)
where \(V\) is the volume of the gold ring and \(ρ\) is the density of gold.
Given:
Volume of the gold ring (V) = 1.91 cm³
Density of gold (ρ) = 19.3 g/cm³
Change in temperature (ΔT) = 27.3 °C - 10.0 °C = 17.3 °C
Specific heat capacity of gold (c) = 0.129 J/g°C
First, let's calculate the mass of the gold ring:
\(\[m = V \times ρ = 1.91 \, \text{cm}³ \times 19.3 \, \text{g/cm}³\]\)
Then, we can calculate the amount of heat absorbed:
\(\[Q = m \times c \times ΔT\]\)
Now we can substitute the values into the formulas and calculate the heat absorbed.
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Which free body diagram represents the forces acting on an object the moment the applied is removed ,but while the object is still moving forward
Answers
The diagram of free body diagram represents the forces acting on an object the moment the applied is removed ,but while the object is still moving forward is attached in the answer.
What is free body diagram?The relative strength and direction of all forces operating on an object in a specific circumstance can be depicted using free body diagrams (FBDs), which are helpful tools. The careful creation of a free-body diagram is a prerequisite for the analysis and description of the majority of physical processes. In a free body diagram, the size of the arrow represents the force's magnitude, while the direction of the arrow represents the way it acts.
Describes what a free body diagram is: A graphic, dematerialized, symbolic representation of the body (a structure, element, or fragment of an element) in which all connecting "parts" have been eliminated is known as a free-body diagram.
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Which element is LEAST likely to react with Magnesium?
a. Calcium
b. Sulfur
c. Chlorine
d. Iodine
Answers
Answer:
my only true question is b
A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package.
Answers
The given statement "A large bulk quantity is defined as 3,000 kg (6,614 lbs.) for solids and 3,000 liters (792 gallons) for liquids and gases in a single package" is true.
What is large bulk quantity?
Each person who carries one or more of the hazardous items must create and follow a transportation security plan for hazardous materials that complies with the requirements of safety and security plans section.3,000 kilograms (6,614 lbs) or 3,000 liters (792 gal) or more of solids or liquids in a single container, such as a cargo tanker, portable tank, tank car, or other bulk container, is referred to as a "large bulk quantity."The security plan must include an evaluation of transportation security risks for shipments of the dangerous goods listed in §172.800, including site-specific or location-specific risks connected with facilities where the dangerous goods listed in §172.800 are prepared for transportation, stored, or unloaded incidentally to movement, and suitable countermeasures to the evaluated risks.Learn more about the Hazardous bulk with the help of the given link:
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angular momentum in magnitude
Answers
Answer:
Angular momentum is a vector quantity, meaning it has both magnitude and direction. The magnitude of angular momentum is given by the product of the moment of inertia and the angular velocity. Mathematically, it is represented as:
L = I * ω
where:
L is the angular momentum,
I is the moment of inertia, and
ω (omega) is the angular velocity.
The moment of inertia represents the rotational inertia of an object and depends on both the mass distribution and the axis of rotation. It is denoted by the symbol I.
The angular velocity (ω) represents how fast an object is rotating and is measured in radians per second.
The magnitude of angular momentum (L) depends on the values of the moment of inertia and the angular velocity. Increasing either the moment of inertia or the angular velocity will result in an increase in the magnitude of angular momentum.
It's important to note that angular momentum is conserved in a closed system when no external torques are acting on it. This conservation principle means that the total angular momentum of a system remains constant unless acted upon by external influences.
hope this is helpful for you :)
During the summertime in texas, mosquitos swarm. cars driving on the highways get covered in bugs. which of the two forces is greater, the force on the mosquitoes or the force on the cars?
Answers
During the summertime in Texas, mosquitos swarm. cars driving on the highways get covered in bugs. which of the two forces is greater, Neither, they both experience the same force in opposite directions.
By Newton's third law, that car pushes on mosquitoes with the same force, but in the opposite direction. This force causes mosquitoes to slow down. One force of the action-reaction force pair is exerted on mosquitoes, and the other force of the force pair is exerted on mosquitoes.
Examples of action-reaction pair:
A swimmer swimming forward.A ball is thrown against a wall.A person is diving off a raft.A person pushes against a wall (action force), and the wall exerts an equal and opposite force against the person (reaction force).To learn more about Newton's third law of motion here
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kid is bouncing on a pogo stick. he oscillates 22.0 times in 14.9 s. What is his period?
Answers
Answer:
Period = 0.68 seconds
Explanation:
Given the following data;
Number of oscillation = 22
Time = 14.9 seconds
To find the period;
Method I.
Period = time/number of oscillation
Period = 14.9/22
Period = 0.68 seconds.
Method II.
We would find the frequency of the wave;
Frequency = time/number of oscillation
Frequency = 22/14.9
Frequency = 1.48 Hertz
Next, we find the period;
Period = 1/frequency
Period = 1/1.48
Period = 0.68 seconds
when you switch the appliances in a house, the current supplied to the house increases .State whether the appliances connected to the house is parallel or in series
Answers
parallel circuits is used in the house.
For household circuits, parallel circuits are always used because: In parallel circuits, all other electrical appliances continue to operate correctly even if one electrical appliance stops functioning for whatever reason. In a parallel circuit, each electrical appliance has its own switch, allowing it to be switched on or off independently without impacting other appliances. In a parallel circuit, every electrical device receives the same voltage as the power supply line.
When electrical devices are linked in parallel, the overall resistance of the home circuit is decreased, causing a large current to flow from the power source.
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At the top of the loop, what is the direction of the force exerted on a 65 kg rider by the seatbelt? a. upwardb. downwardc. this force has no direction, it is (approximately) zero
Answers
a. upward. The rider is upside down at the top of the loop, and the seatbelt provides a centripetal force that pulls the rider upward toward the center of the circle, allowing them to follow a circular path.
Centripetal force is a type of force that acts on an object moving in a circular path. It is directed towards the center of the circle and is necessary to keep the thing moving in a circular direction. The centripetal force can be provided by a variety of sources, such as tension in a rope, gravity, or a magnetic field. The magnitude of the centripetal force required depends on the mass of the object, the speed of the thing, and the radius of the circle.
The formula for centripetal force is
F = mv²/r,
where F is the force, m is the mass of the object, v is the velocity of the object, and r is the radius of the circle. Centripetal force is an essential concept in many areas of physics, including mechanics, astrophysics, and engineering, and it plays a significant role in the functioning of many natural and man-made systems, such as planetary orbits, and centrifuges.
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what is Kirchhoff's Current Law (KCL) "Junction Rule"
Answers
Kirchhoff's Current Law (KCL), also known as the Junction Rule, states that the sum of currents entering a junction in an electrical circuit must equal the sum of currents leaving the junction.
In other words, the total current flowing into a junction must be equal to the total current flowing out of the junction. This law is important in analyzing complex circuits and ensuring that current is conserved at every point in the circuit. Kirchhoff's Current Law (KCL), also known as the Junction Rule, states that the sum of currents entering a junction in an electrical circuit must equal the sum of currents leaving the junction.
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a solenoid with 400 turns has a radius of 0.040 m and is 40 cm long. if this solenoid carries a current of 12 a, what is the magnitude of the magnetic field near the center of the solenoid? (μ0
Answers
According to the question, the magnitude of the magnetic field near the center of the solenoid is approximately 0.301 T.
To find the magnitude of the magnetic field near the center of the solenoid, we can use the formula for the magnetic field inside a solenoid:
B
= (μ0 * n * I) / L
Where:
B is the magnetic field
μ0 is the permeability of free space (4π * 10^-7 T*m/A)
n is the number of turns per unit length (turns/m)
I is the current
L is the length of the solenoid
First, let's calculate n, the number of turns per unit length:
n
= N / L
Where:
N is the total number of turns
L is the length of the solenoid
Given that the solenoid has 400 turns and a length of 40 cm (0.4 m):
n
= 400 / 0.4
n
= 1000 turns/m
Now, we can substitute the values into the formula:
B
= (μ0 * n * I) / L
B
= (4π * 10^-7 T*m/A * 1000 turns/m * 12 A) / 0.4 m
Calculating the expression:
B
= (4π * 10^-7 T*m/A * 1000 turns/m * 12 A) / 0.4 m
B
≈ 0.301 T
Therefore, the magnitude of the magnetic field near the center of the solenoid is approximately 0.301 T.
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how many different states are possible for an electron whose principal quantum number is n = 4? write down the quantum numbers for each state.
Answers
There are 16 different states possible for an electron with principle quantum number 4.
If the principle quantum number of an electron is 4, then its possible values of the azimuthal quantum number l range from 0 to 3
Since l = n-1(n=4) (i.e., l can be 0, 1, 2, or 3), since l can have any integer value from 0 to n-1, where n is the principle quantum number.
For each value of l, there are possible values of the magnetic quantum number m, which range from -l to l. Therefore, for l = 0, there is only one possible value of m, which is 0. For l = 1, there are three possible values of m, which are -1, 0, and 1. For l = 2, there are five possible values of m, which are -2, -1, 0, 1, and 2. And for l = 3, there are seven possible values of m, which are -3, -2, -1, 0, 1, 2, and 3.
Therefore, the total number of possible states for an electron with principle quantum number 4 is the sum of the number of possible states for each value of l:
1 (for l = 0) + 3 (for l = 1) + 5 (for l = 2) + 7 (for l = 3) = 16
So, there are 16 different states possible for an electron with principle quantum number 4.
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_____ atoms give organic molecules their overall shape; _____ atoms determine the overall chemical behavior of organic molecules.
Answers
Carbon atoms give organic molecules their overall shape; functional group atoms determine the overall chemical behavior of organic molecules.
Carbon atoms are the building blocks of organic molecules, which are molecules that contain carbon atoms bonded to hydrogen atoms. Carbon atoms have four valence electrons, which allows them to form four covalent bonds with other atoms, such as hydrogen, oxygen, nitrogen, and other carbon atoms. This ability to form multiple bonds allows carbon atoms to connect to each other in a variety of ways, creating an almost endless variety of organic molecules with different shapes and properties. Carbon atoms can form single, double or triple bonds with each other and other atoms, which gives rise to different chemical properties and structures of organic molecules. For example, single bonds are relatively weak and allow for rotation around the bond, whereas double and triple bonds are stronger and do not allow for rotation. This difference in bond strength and rotational freedom is the basis for the different types of isomers, compounds with the same chemical formula but different structures and properties. Furthermore, Carbon atoms can also form cyclic structures such as cyclohexane, cyclopentane and aromatic compounds such as benzene and its derivatives. These cyclic structures are planar and have special properties like stability, reactivity and electronic distribution.
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what gauge pressure, in pascals, is required to lift a car with a mass of 1200 kg ? express the result of part a in atmospheres.
Answers
The pressure to atmospheres, divide the pressure by 101,325 Pa, which is the atmospheric pressure at sea level 116.1 atm.
What is atmospheres?Atmospheres is a measure of atmospheric pressure, defined as the pressure exerted by the weight of air above a given point. It is typically measured with a barometer, a device which measures the pressure of the surrounding air. Atmospheric pressure decreases with increasing altitude and is measured in units of atmospheres (atm). The average atmospheric pressure at sea level is approximately one atmosphere, or 101.3 kilopascals (kPa). The effects of atmospheric pressure can be seen in everyday life, as it affects the boiling point of water, the speed of sound, and the behavior of aircraft.
The pressure required to lift the car is:
P = (1200 kg * 9.8 m/s2) / A
Since the area is unknown, we can calculate the pressure in Pascals.
P = 11,760,000 Pa
To convert the pressure to atmospheres, divide the pressure by 101,325 Pa, which is the atmospheric pressure at sea level:
Atmospheres = 11,760,000 Pa / 101,325 Pa = 116.1 atm
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Hooke's law states that the force required to stretch a spring is proportional to the distance that the spring is stretched from its original length. A force of120lb is required to stretch a spring 6in from its natural length. How much force is needed to stretch the spring 9in beyond its natural length?
Answers
A force of 180lb is needed to stretch the spring 9in beyond its natural length.
Fs = kx is the equation for Hooke's Law.
We can use this formula to solve your problem. we can find the spring constant k by dividing the force by the distance:
k = F/s = 120lb/6in = 20lb/in
Now we can use this value of k to find out how much force is needed to stretch the spring 9in beyond its natural length:
F = ks = 20lb/in * 9in = 180lb
A force in physics is an effect that causes the motion of an object with mass to alter its velocity (e.g., moving from a state of rest), i.e., to accelerate. It can be a push or a pull, but it always has magnitude and direction, making it a vector quantity. It is measured in newtons (N) and is symbolized by the sign F (previously P).
The original phrasing of Newton's second law says that the net force exerted on an item is equal to the rate at which its momentum changes over time. If the item's mass remains constant, this rule means that the acceleration of an object is precisely proportional to the net force applied on the object.
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Which of the following occurs during meiosis ll?
Choose 1 answer:
A
Crossing over of homologous pairs
B
The separation of sister chromatids
С
The formation of two diploid daughter cells
D
The doubling of genetic information
Answers
Answer:
(b)The separation of sister chromatids
Explanation:
khan academy showed this after getting wrong lol
What happens to the acceleration due to gravity as you move farther away from the center of the earth?
Answers
Answer:
there less and less gravity while your going farther and farther
How do bearings help reduce friction?
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Bearings are constrained elements used to reduce the friction of certain moving parts in a machine or device. This is done by replacing sliding friction with rolling friction. Bearings are used to provide better linear motion or rotation around a fixed axis.Roller bearings are typically cylinders similar to free rollers, except that they are constrained in their motion. Ball bearings are spheres that are held in a track.What is the difference of Mitosis and Meiosis? Please explain it in easy way.
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Answer:
The nuclear division processes of mitosis and meiosis occur during cell division. During mitosis, body cells are divided, while during meiosis, s3x cells are divided. At mitosis, a cell divides once; at meiosis, it divides twice.
Explanation:
PLEASE HELP!!
A swimmer starting from rest has a final velocity of 2.0 m/s after 20 seconds. What is her average acceleration?
O A. 18 m/s2
OB. 22 m/s2
OC. 0.10 m/s2
O D. 40 m/s2
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Answer:
\(a=0.1\ m/s^2\)
Explanation:
Given that,
Initial velocity, u = 0
Final velocity, v = 2 m/s
Time, t = 20 s
We need to find the acceleration of the swimmer. The acceleration of an object is equal to the change in velocity per unit time. It can be given by :
\(a=\dfrac{v-u}{t}\\\\a=\dfrac{2\ m/s}{20\ s}\\\\a=0.1\ m/s^2\)
So, her average acceleration of the swimmer is \(0.1\ m/s^2\).