According to newton's second law, if you double the force acting on a body, the acceleration will double.
a. true
b. false
Answers
It is the true statement, that if we double the force acting on a body, the acceleration will double.
What is acceleration?In terms of both speed and direction, acceleration is the rate at which velocity varies over time. Acceleration refers to the change in speed or direction of an item or point travelling straight forward. Due to the constant change in direction, motion on a circle accelerates even while the speed is constant. Both impacts help to accelerate all other types of motion.
In order to be a vector quantity, acceleration must have both a magnitude and a direction. As a vector quantity, velocity is also. A time interval's velocity vector change divided by that interval's duration is the definition of acceleration.
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Related Questions
please help !! After the collision, the two cars stick together. Find the final velocity of the two cars.
Answers
After the collision, the two cars stick together. Find the final velocity of the two cars would be 0.667 meters per second as per the conservation of the momentum after the collision.
What is elastic collision?
It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved.
As given in the problem we have to find the velocity of the two cars if, after the collision, the two cars stick together,
As per the conservation of the momentum,
The total initial momentum of the cars before the collision = The total final momentum of the cars after the collision
1 × 2 + 2 × 0 = ( 1 + 2 ) × V
2 + 0 = 3 × V
V = 2 / 3
V = 0.667 meters per second
Thus, after the collision, the two cars stick together, then the final velocity of the two cars would be 0.667 meters per second
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we know we have exerted a force even when we have no work done
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In a Young's double slit experiment, green light is incident of the two slits; and the resulting interference pattern is observed a screen. Which one of the following changes would cause the fringes to be spaced further apart? a) Move the screen closer to the slits. b) Move the light source closer to the slits. c) Increase the distance between the slits. d) Use orange light instead of green light. e) Use blue light instead of green light.
Answers
The fringes would be spaced further apart if the distance between the slits is increased.
When green light is incident on the two slits in a Young's double slit experiment, an interference pattern is observed on a screen. The fringes in the interference pattern are formed due to the superposition of light waves from the two slits. The spacing between the fringes depends on the wavelength of the light and the distance between the slits.
By increasing the distance between the slits, the fringes in the interference pattern would be spaced further apart. This is because the distance between the slits affects the phase difference between the light waves reaching the screen. A larger distance between the slits means that the phase difference between the waves at each point on the screen will be greater, leading to wider separation between the fringes.
In contrast, moving the screen closer to the slits or moving the light source closer to the slits would not affect the spacing between the fringes. The distance between the screen and the slits, as well as the distance between the light source and the slits, do not directly influence the phase difference between the light waves, and therefore do not affect the fringe spacing.
Using different colors of light, such as orange or blue light instead of green light, would change the wavelength of the light. However, the wavelength of the light affects the fringe spacing, not the actual spacing between the fringes. Therefore, changing the color of light would not cause the fringes to be spaced further apart.
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Why is thunder heard later after than the flash of light?
Answers
Answer:
During a thunderstorm, lightning is seen first and thunder is heard later on because light travels faster than sound. If you see a lightning flash but cannot hear any thunder, the thunderstorm is most likely be quite far away from you.
III. When you are on a rollercoaster, at what point will you have the highest amount of
(a) gravitational potential energy (GPE) ? _________________________________
(b) kinetic energy (KE) ? ________________________________________________
Answers
Answer:
b
Explanation:
I think so I'm not 100% sure sorry
Two objects with the same mass move with the same speed but in opposite directions. Compare their kinetic energies.
A.
Kinetic energies are equal.
B.
Kinetic energies are opposite in magnitude.
C.
Kinetic energy of the higher object is greater.
D.
Kinetic energy of the lower object is greater.
Answers
Answer:
A. Kinetic energies are equal.
Explanation:
The kinetic energy of the bodies will be equal since the mass and speed are the same.
Kinetic energy is the energy due to the motion of a body.
Mathematically;
K.E = \(\frac{1}{2}\) m v²
m is the mass
v is the speed
The kinetic energy is a scalar quantity with no regard for direction.
Answer:kinetic energies are equal
Explanation:
PLEASE HELP!! IM DUMB!!!!
In the atom nearly all the mass is found in the _______.
A. protons
B. nucleus
C. neutrons
D. electrons
Answers
how far form earth musta a spoace probe be along a line toward the sun so than the suns graficational pull on the probe balances earths pull
Answers
The space probe must be at a distance of 258774.9441 m from the earth.
Let us assume, x is the distance of probe from the earth
y is the distance of probe from the sun
Distance between the earth and the sun = x + y = 149.6 * 10⁶ m
G = Gravitational constant
Ms = Mass of the sun = 1.989* 10³⁰ kg
Me = Mass of the earth = 5.972 * 10²⁴ kg
Now, let us put the values in the below equation
(G * Ms * m)/ x² = (G * Me * m)/ y²
Ms / x² = Me / y²
x = √(Ms * y²/ Me) = √( 1.989* 10³⁰y²/ 5.972 * 10²⁴ ) = 577.10852y
x + y = 149.6 * 10⁶
577.10852 y + y = 149.6 * 10⁶
578.10852 y = 149.6 * 10⁶
y = (149.6 * 10⁶ )/ 578.10852 = 258774.9441 m
The probe should be 258774.9441 m from the earth.
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Chameleons catch insects with their tongues, which they can rapidly extend to great lengths. In a typical strike, the chameleon's tongue accelerates at a remarkable
for 20 ms, then travels at a constant speed for another 30 ms.
a) During this total time of 50 ms, 1/20 of a second, how far does the tongue reach?
Answers
Thus, during the total time of 50 m/s, the tongue reaches 0.0006 m + 0.0036 m = 0.0042 m or 4.2 millimeters. The tongue extends quickly to a distance of 1.5 times the length of the chameleon's body to catch the prey.
In a typical strike, a chameleon's tongue accelerates at a remarkable pace for 20 milliseconds, then travels at a constant speed for another 30 milliseconds.
During this total time of 50 milliseconds, or 1/20 of a second, how far does the tongue reach?
The average chameleon tongue length is 1.5 times the length of its body. The tongue's mucus-covered tip is inflated to catch prey.
When prey is within range, the tongue's muscles contract, propelling the tongue toward the prey at a speed of 60 miles per hour (97 km/h) in just 0.07 seconds.
The tongue's acceleration, on the other hand, is 6 m/s2. Given the initial velocity is 0 m/s, we can use the following formula:
Distance = (Acceleration × Time²) / 2 = (6 × 0.02²) / 2 = 0.0006 m.
We can now calculate the tongue's velocity by dividing the distance travelled during acceleration by the duration of the acceleration:
Velocity = Acceleration × Time = 6 × 0.02 = 0.12 m/s.
During the remaining 30 milliseconds, the tongue moves at a constant velocity of 0.12 meters per second, giving a distance of:
Distance = Velocity × Time = 0.12 × 0.03 = 0.0036 m (or 3.6 mm).
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What is Meaning of Registration
Answers
Answer:
Theres 2 meanings first is:
the action or process of registering or of being registered.
The other one is:
a combination of stops used when playing the organ.
The meaning of registration is the action of process of registering to some applications or websites which includes some terms and conditions also.
What is registration?Registration is the process or action of registering into a website or application or to any institute through online or offline mode. By registering we are giving some personal and professional details as per the requirements of the source which need us to be registered.
For example, if we are applying for a central examination, we have to register our name and details in the official website of the examination board.
The registration process bring us some terms and conditions which we can apply or accept to continue the registration process. After successful registration we can have an acknowledgement for the action.
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A basketball player jumps off the ground with an initial velocity of 2.8 m/s upwards. How long before she returns to the ground? Answer in seconds. If more information is needed, type -888 in the box.
Answers
Therefore, it will take approximately 0.57 seconds for the basketball player to return to the ground.Answer: 0.57 seconds.
To determine the time taken by the basketball player to return to the ground, we can use the equation;
\(h = vi * t + 1/2 * g * t²\)
Where
h = heightv
i = initial velocity
g = acceleration due to gravity
t = time taken by the player to return to the ground
Given, vi = 2.8 m/s upwards (negative direction)
At the highest point, the player will have a velocity of 0 m/s, since she momentarily stops at the highest point.
Since acceleration due to gravity (g) is acting downwards, we can take its value as -9.8 m/s²
Therefore, applying the above equation at the highest point,
\(0 = 2.8t + 1/2 * (-9.8) * t²\)
Simplifying the above equation,0 = 2.8t - 4.9t²
Taking t common,0 = t(2.8 - 4.9t)
We know that the player will be back to the ground when she reaches the initial position, and as the direction of motion is upwards, we can take the time taken as positive.
Therefore,t = 0 s (Initial time)Or,
2.8 - 4.9t
= 0∴
t = 2.8/4.9 ≈ 0.57 s
Therefore, it will take approximately 0.57 seconds for the basketball player to return to the ground.Answer: 0.57 seconds.
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Imagine you are riding a horse that is walking around a circle with a radius of 4 m. A friend sits on a walking horse that is 8 m from the center of that same circle. In one rotation, what distance does she travel? If you both complete one rotation in the same time, how does her speed compare to yours?
Answers
The distance covered by the friend is 50.28 m.
The speed of the friend is twice mine.
What is the distance around a circle?The distance around a circle is known as the circumference of a circle.
To calculate the circumference of a circle, the formula below is used:
circumference = 2 * π * r
where;
r is the radius of the circle
π is a constant = 22/7
The circumference of the two circles will be
Circle 1; r = 4 m
Circumference = 2 * 22/7 * 4 m
Circumference = 25.14 m
Circle 2; r = 8 m
Circumference = 2 * 22/7 * 8 m
Circumference = 50.28 m
If the same time is taken to complete both distances, it means that the second horse is moving twice as fast as the first.
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10 importance of physics
Answers
Answer:
Physics is an exciting intellectual adventure that inspires young people and expands the frontiers of our knowledge about Nature.
Physics generates fundamental knowledge needed for the future technological advances that will continue to drive the economic engines of the world.
Physics contributes to the technological infrastructure and provides trained personnel needed to take advantage of scientific advances and discoveries.
Physics is an important element in the education of chemists, engineers and computer scientists, as well as practitioners of the other physical and biomedical sciences.
Physics extends and enhances our understanding of other disciplines, such as the earth, agricultural, chemical, biological, and environmental sciences, plus astrophysics and cosmology - subjects of substantial importance to all peoples of the world.
Physics improves our quality of life by providing the basic understanding necessary for developing new instrumentation and techniques for medical applications, such as computer tomography, magnetic resonance imaging, positron emission tomography, ultrasonic imaging, and laser surgery.
Answer:
Physics contributes to the technological infrastructure and provides trained personnel needed to take advantage of scientific advances and discoveries. Physics is an important element in the education of chemists, engineers and computer scientists, as well as practitioners of the other physical and biomedical sciences.
Physics in everyday life
Physics, or the study of matter, energy, and the interactions between them, helps us to understand the laws and rules that govern the physical world. Not every student will grow up and study physics on a deeper level, but everyone uses basic physics concepts to navigate everyday life.
Long Answer Type Questions
1 Can you differentiate between opaque, transparent and translucent objects
2 What is reflection of light?
3. What are the conditions for a shadow to be formed?
4. Prove through an experiment that light travels in straight lines.
5. What is pinhole camera? Explain its working with the help of a diagram
6. What are the main differences between a reflected image and shadows?
Answers
(1).....opaque -object that not allow light to pass through it
we can't look through opaque objects
ex..wall
translucent... objects that all some light to pass through it
we can partially see through it
ex...coloured glass window
transparent... objects that wholly allow light to pass through it
we can clearly see through it
ex...glass of specs
(2)..the bouncing back of light from a smooth polished surface is called reflection of light
(3)/.....there must be a solid ,opaque to block light
there must be a source of light
there must be a surface to have shadow on it..
(6)...reflected images r formed by light reflection from a smooth polished surface while shadows are formed by blockage of light by an solid,opaque object...
Explanation:
we should talk here thanks
Which statement describes a controlled experiment?
A. It includes two groups, both of which are exposed to the factor
being tested.
B. It includes a group exposed to one of the factors being tested and
a group that is exposed to another of the factors being tested.
C. It includes a group exposed to the factor being tested and a group
that is not exposed to the factor being tested.
D. It includes two groups, neither of which is exposed to the factor
being tested.
Answers
Answer:The answers is c, a group exposed to the factor being tested, and a group that isn’t exposed to the factor tested.
Explanation:
A person is rowing across the river with a velocity of 4. 5 km/hr northward. The river is flowing eastward at 3. 5 km/hr. What is the magnitude of her velocity (v) with respect to the shore?
Answers
The velocity of the rower relative to the shore is the sum of her velocity relative to the water and the velocity of the water relative to the shore:
\(\vec v_{R/S} = \vec v_{R/W} + \vec v_{W/S}\)
Then
\(\vec v_{R/S} = \left(4.5\dfrac{\rm km}{\rm h},0\right) + \left(0,3.5\dfrac{\rm km}{\rm h}\right) = (4.5,3.5)\dfrac{\rm km}{\rm h}\)
The magnitude of this velocity is
√(4.5² + 3.5²) m/s ≈ 5.7 m/s
The height, in feet, of objects launched from a pirate ship's cannon can be modelled by h=-1/5t^2 + 5t + 18 where t is the time in seconds. What is the height of the cannon where the objects are launched from?
Answers
The height of the cannon where the objects are launched from is 18 feet.
The canons of page construction are historical reconstructions, based on careful measurement of extant books and what is known of the mathematics and engineering methods of the time, of manuscript-framework methods that may have been used in Medieval- or Renaissance-era book design to divide a page into pleasing proportions. Since their popularization in the 20th century, these canons have influenced modern-day book design in the ways that page proportions, margins and type areas (print spaces) of books are constructed.
To determine the height of the cannon where the objects are launched from, we need to find the value of "h" when "t" is equal to zero.
Given the equation: h = (-1/5)×t^2 + 5×(t) + 18
Substituting t = 0 into the equation, we have:
h = (-1/5)×(0)^2 + 5(0) + 18
= 0 + 0 + 18
= 18
Therefore, the height of the cannon where the objects are launched from is 18 feet.
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Rank in order, from largest to smallest. the electric potentials V_1 to V_5 at points 1 to 5. The figure shows to points inside a capacitor. Let V + 0V at the negative plate. What is the ratio V_2/V_1 of the electric potential at these two points? Explain. What is the ratio E_2/E_1 of the electric field strength at these two points? Explain. The figure shows two capacitors, each with a 3 min separation. A proton released from rest in the center of each capacitor. Draw an arrow on each proton to show the direction it moves. Which proton reaches a capacitor plate first? Or are they simultaneous? Explain.
Answers
To rank the electric potentials V_1 to V_5 from largest to smallest, we need to consider their positions inside the capacitor. Since the electric potential decreases from the positive plate to the negative plate, the order will be:
V_1 (largest) > V_2 > V_3 > V_4 > V_5 (smallest).
To find the ratio V_2/V_1 of the electric potential at points 1 and 2, we must know their respective distances from the positive plate. Without specific distance values, we cannot calculate the exact ratio. However, since V_1 is closer to the positive plate than V_2, we know that the ratio V_2/V_1 will be less than 1.
The ratio E_2/E_1 of the electric field strength at points 1 and 2 is equal to 1 because the electric field inside a parallel plate capacitor is constant. This means that the electric field strength at any two points inside the capacitor is the same.
For the proton released from rest in the center of each capacitor, the arrow direction on each proton will show the direction it moves. Protons are positively charged particles and will move towards the negative plate in the electric field created by the capacitor.
As for which proton reaches a capacitor plate first or if they are simultaneous, without knowing the exact dimensions and electric field strengths of the capacitors, we cannot determine this.
However, if the capacitors have the same electric field strength and dimensions, then the protons would reach the plates simultaneously.
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i need help
i don’t understand how to do this question and i need it to be done by today
Answers
The characteristics of Elements include:
made of one type of atomrepresented by symbolscannot be broken downCompounds:
made of two or more types of atomsrepresented by formulascan be chemically broken downHow to explain the informationElements are substances that consist of only one type of atom. This means that all the atoms within an element are the same. Elements are represented by symbols, which are usually derived from their English or Latin names.
Compounds, on the other hand, are substances that are made up of two or more different types of atoms chemically combined together. Unlike elements, compounds have a definite chemical formula that represents the ratio of the atoms present in the compound. These formulas often use the symbols of the elements involved and indicate the number of atoms of each element present in the compound.
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write the importance of international Bureu of weights and Measures in the country.
Answers
Answer:
International Bureau of Weights and Measures (BIPM), French Bureau International des Poids et Mesures, international organization founded to bring about the unification of measurement systems, to establish and preserve fundamental international standards and prototypes, to verify national standards, and to determine fundamental physical constants. The bureau was established by a convention signed in Paris on May 20, 1875, effective January 1876. In 1921 a modified convention was signed.
Which electromagnetic waves which electromagnetic waves have the highest frequencies in the electromagnetic spectrum?
OA.
gamma rays
B.
microwaves
O C.
radio waves
OD.
ultraviolet radiation
Answers
Answer:
gamma rays
Explanation:
During first half of a journey by a body it travel with a speed of 40km/hr and in the next half it travels with a speed of 20 km/hr .Calculate the average speed of the whole journey.
Answers
Answer:
Average speed = 26.67 km/h
Explanation:
It is given that,
The first half of the journey by a body is traveled with a speed of 40 km/h and the next half is covered with a speed of 20 km/h
We need to find the average speed of the whole journey. When two speeds are given, the average speed is given by :
\(v=\dfrac{2v_1v_2}{v_1+v_2}\\\\v=\dfrac{2\times 40\times 20}{40+20}\\\\v=26.67\ km/h\)
So, the average speed of the body of the whole journey is 26.67 km/h.
an ultracentrifuge accelerates from rest to 96000 rpm in 1.90 min. what is its angular acceleration in rad/s2. (you do not need to enter any units.) tries 0/99 what is the tangential acceleration of a point 11.20 cm from the axis of rotation?
Answers
The angular acceleration of a. the ultracentrifuge is approximately: 2.074 rad/s² and b. The tangential acceleration of a point 11.20 cm from the axis of rotation is approximately 2542.6 cm/s².
What is tangential acceleration?
Tangential acceleration refers to the rate of change of an object's tangential velocity. It is the component of acceleration that is parallel to the object's instantaneous velocity vector and is directed along the tangent of its circular path.
The formula for tangential acceleration can be expressed as: Tangential acceleration (aₜ) = (Change in tangential velocity)/(Change in time)
To calculate the angular acceleration, we use the formula: angular acceleration (α) = (final angular velocity - initial angular velocity) / time.
Converting the given final angular velocity of 96000 rpm to rad/s (by multiplying by 2π/60) and the given time of 1.90 min to seconds, we can substitute these values into the formula to obtain
α ≈ (96000 rpm * 2π/60 - 0) / (1.90 min * 60 s/min) ≈ 2.074 rad/s².
The tangential acceleration (at) of a point on a rotating object is given by the formula: at = r * α, where r is the distance from the axis of rotation and α is the angular acceleration.
Converting the given distance of 11.20 cm to meters and using the previously calculated angular acceleration of approximately 2.074 rad/s², we can substitute these values into the formula to obtain at ≈ 11.20 cm * (2.074 rad/s²) ≈ 2542.6 cm/s².
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A car goes from rest to 25 m/s in 10 seconds. Determind the acceleration of the car.
Answers
Answer:
2.5m/s^2
Explanation:
a=velocity/time
a=25m/s/10s
a=2.5m/s^2
The kinetic theory explains the ability of gases to be forced or squeezed into smaller volumes. What is this ability called? A. definite volume B. absolute volume C. diffusion D. compressibility
Answers
Answer:
The ability of gases to be forced or squeezed into smaller volumes is called compressibility
8. Paige dropped a ball out of a car while her friend Destiny was traveling at a velocity of 25
m/s. The ball underwent a deceleration of -2m/s² and rolled to a stop on the pavement. How
long did it take the ball to stop?
Answers
Answer:
I think it's 12.5s
Explanation:
Bare with me, because I just started physics, but I think I have the answer right... Hopefully.
starting with your knowns, we know velocity is 25 m/s from the problem. you also can figure out your acceleration, -2 m/s.
You're looking for the time it takes until the ball stops rolling. Your time is unknown.
Your equation would be a=v/t (acceleration being a, velocity being v, and time being t)
You have to solve for t giving you t=v/a
Now you have to fill in your numbers. t=25m/s divided by -2m/s^2
Your answer should end up as -12.5
You have to solve for your units, but since you're finding time it's pretty straightforward in knowing you're dealing with seconds.
Hope this helped... :) sorry if it didn't-
in a pulsating variable stars which characteristic of the star changes dramatically with time
Answers
Pulsating variable stars are stars that exhibit periodic changes in their brightness or luminosity. These changes occur due to the expansion and contraction of the star's outer layers.
The characteristic of the star that changes dramatically with time is its radius. As the star expands and contracts, its radius changes, causing its luminosity to vary. This pulsating behavior is caused by the star's internal pressure and temperature fluctuations, which drive the expansion and contraction of its outer layers. The pulsation period of these stars can range from minutes to years, depending on the star's mass and other physical properties.
The study of pulsating variable stars has been crucial in advancing our understanding of stellar evolution and the structure of the universe. By observing the pulsations of these stars, astronomers can determine their distances and other important parameters, such as their ages and chemical compositions.
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write any two uses of a wedge.
Answers
Answer: two uses of a wedge can be to tighten things as well as to lift things.
Explanation: because that is some things wedges (a mechanical tool) can do.
How to tells when lines are parallel?
Answers
2. does the power spectrum depend on the fundamental frequency? explain!
Answers
Yes, the power spectrum does depend on the fundamental frequency.
The fundamental frequency is the lowest frequency of a periodic waveform, and it determines the overall shape of the power spectrum. The power spectrum is a representation of the energy distribution of a signal across different frequencies.
When the fundamental frequency is high, the power spectrum will have more energy concentrated at higher frequencies. Conversely, when the fundamental frequency is low, the power spectrum will have more energy concentrated at lower frequencies.
In summary, the fundamental frequency is an important factor that determines the shape of the power spectrum. By analyzing the power spectrum, we can gain insight into the frequency components of a signal and how they are distributed.
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