Answer:
1 st one
Explanation:
The interactions between water molecules as the temperature in the system decreases b) The interaction between the molecule will become stronger
What is molecular interaction?
Molecular interactions are attractive or repulsive forces between molecules and between non-bonded atoms
When temperature of the system decreases the average kinetic energy of the molecules decreases and they move slowly , the molecular motion get decreased , if the molecules are near each other , the slower they go , more will be molecular interactions , the intermolecular forces attract them to each other .
the correct answer is :
b) The interaction between the molecule will become stronger
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Neptune circles the Sun at a distance of 4.50 × 1012 m once every 164 years. Saturn circles the Sun at a distance of 1.43 × 1012 m. What is the orbital period of Saturn?
The orbital time period of the Saturn is 29.6 years
We are given that,
Distance from Sun to Saturn is = a = 1.43 × 10¹²
The mass of the Sun is = M =1.99 × 10³⁰kg
The Gravitational constant = G = 6.67 × 10⁻¹¹N-m²kg⁻²
To find the orbital period of Saturn we can use the equation ,
\(T^{2} = \frac{4\pi }{GM}a^{3}\)
Where, T is the orbital time period of the of the Saturn , M is the mass of the sun , G is the gravitational constant.
Therefore, after putting the value in above equation we can get,
\(T^{2} = \frac{4(\(3.14)^{2} }{(6.67*10)^{-11} )N-m^{2} kg^{-2}}(1.43*10^{12}) ^{3}m\)
\(T^{2} = \sqrt{8.688*10^{17} } s\)
\(T = 932094415.818s\)
So that , from above to convert the orbital time period of Saturn from second into year i.e. above seconds divided by seconds (1 sec = 3.154 ×10⁷ Earth years)
Thus, the orbital time period can be ,
\(T = 29.6 years\)
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A gymnast launches off a springboard an angle of 40 degreeswith an initial velocity of 8 m/s. a.What is his horizontal velocity?
b.What is his initial vertical velocity?
c.How long does he remain in the air?
d.How far does he travel horizontally?
. A mass m is traveling at an initial speed of 25.0 m/s. It is brought to rest in a distance of 62.5 m by a net force of 15.0 N. The mass is
Answer:
m = 3 kg
The mass m is 3 kg
Explanation:
From the equations of motion;
s = 0.5(u+v)t
Making t thr subject of formula;
t = 2s/(u+v)
t = time taken
s = distance travelled during deceleration = 62.5 m
u = initial speed = 25 m/s
v = final velocity = 0
Substituting the given values;
t = (2×62.5)/(25+0)
t = 5
Since, t = 5 the acceleration during this period is;
acceleration a = ∆v/t = (v-u)/t
a = (25)/5
a = 5 m/s^2
Force F = mass × acceleration
F = ma
Making m the subject of formula;
m = F/a
net force F = 15.0N
Substituting the values
m = 15/5
m = 3 kg
The mass m is 3 kg
in the double-slit experiment, fringes are more widely spaced when illumination is with monochromatic
The double-slit experiment, fringes are more widely spaced when illumination is with monochromatic is low frequency light
What is low frequency light?
Light waves have a frequency that is proportional to their energy: Low frequency light is less energetic than high frequency light. Gamma rays therefore have the highest energy, which contributes to their high hazard to humans, whereas radio waves have the lowest energy.
Since the letters in the word "VIBGYOR" are written in decreasing frequency sequence, we can see that Orange has the lowest frequency among the alternatives while Red generally has the lowest frequency.
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is V² = KS² chimensionaty homogeneous?
No, V² = KS² is not dimensionally homogeneous because the dimensions of the left-hand side (L²/T²) are not equal to the dimensions of the right-hand side (ML²/T²).
In the equation V² = KS², V represents velocity (L/T), K represents a dimensionless constant and S represents distance (L). Therefore the dimensions of the left-hand side are (L/T)² which simplifies to L²/T². The dimensions of the right-hand side are K(L)² which simplifies to ML²/T².
Since the dimensions of the left-hand side are not equal to the dimensions of the right-hand side: the equation is not dimensionally homogeneous.
Dimensional homogeneity means that all terms in an equation have the same physical dimensions. In other words: each term in an equation must have the same units of measurement so that the equation is consistent and physically meaningful.
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You've been waiting for the bus and your hands become cold. When you get onto the bus and sit down, you put your hands under your legs to warm up. After a while your hands feel warmer but your legs feel colder. Explain this with regards to what you know about thermal energy transfer
All metabolic process requires the transmission of energy. Because total energy is conserved, there will be no energy loss or gain in a system, and to maintain this balance, energy will be transferred from a lower energy location to a higher energy place.
What is thermal energy?Thermal energy is energy in the form of heat that may be transferred from one component to the other in the same way that any other energy type can.
When energy is conserved in a system, there is no net gain or loss of energy. As a result, energy lost in one area flows to the other sections. Any energy form can go from a low-intensity area to a high-intensity area.
When our hands chill, we may warm them up by rubbing them on our legs. Where heat energy is transmitted from our legs to our hands in order to warm them. Thus, the temperature is delivered to a cooler component from a hot part in this case.
This is an example of heat transfer, thus our legs cool down because part of their temperature is transferred to our hands, but our body's total temperature remains balanced.
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an electricity company claims to generate all of its electricity from environmently friendly energy sources.
the energy sources used by the company are shown in the pie chart
Do you think that the claim made by the company is correct?
The claim made by the company is not correct because gas and nuclear are energy source of pollution.
It is sometimes referred to as a non-conventional or renewable source of energy. For instance, geothermal energy, solar energy, and wind energy. Conventional Source of Energy – Energy sources that are finite and exhaustible are referred to as conventional sources of energy. For instance, fossil fuels like coal, petroleum, etc.
Wind mills may use the kinetic energy that the wind has in large amounts. The windmill's rotation is programmed to drive the turbine, which ultimately produces electricity. In Denmark, more than 25% of all electrical needs are met by electricity. It is referred to as the "country of winds" since a massive network of windmills is used to generate the energy.
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What is generally TRUE about diagnosing psychological disorders?
A.
High levels of neurotransmitters have been linked to depression.
B.
Diagnoses are not based on opinion or personal assessment.
C.
Doctors agree about what behaviors make up each disorder.
D.
Psychological disorders can be very difficult to diagnose.
The statement that says "Psychological disorders can be very difficult to diagnose" is true about diagnosing psychological disorders.
What are psychological disorders?Psychological disorders are those mental, behavioral, emotional and thinking conditions that interfere with the normal performance of the individual in society.
Mental disorders are psychiatric conditions that are expressed in a syndrome, verifiable from different diagnostic criteria.The steps to obtain a diagnosis include a medical history, physical examination, and possibly laboratory tests and a psychological evaluation.Therefore, we can conclude that a psychological disorder is an alteration in the mental balance of a person that requires specialized attention adapted to the characteristics of the dysfunction.
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four point charges are arranged to fomr a rectangle as shown. find the magnitude and direction of the net field at the center
To find the net electric field at the center of a rectangle formed by four point charges, the principle of superposition can be used.
What is "The principle of Superposition"?The principle of superposition is a fundamental concept in physics and engineering that describes the way that linear systems interact with one another. It states that when two or more linear systems are combined, the resulting effect of their combined inputs is equal to the sum of their individual effects. This means that the output of the system in response to the combined inputs is simply the sum of the outputs that would result from each input separately.
The principle of superposition is a powerful tool for solving complex problems in physics and engineering. It allows engineers and scientists to break down a complex system into smaller, more manageable parts and to calculate the overall effect of each part separately before combining them to find the overall effect of the system as a whole.
To find the net electric field at the centre of a rectangle formed by four point charges.
Assuming the rectangle has sides of length L and the charges are all equal in magnitude, with value q, we can find the electric field at the center of the rectangle as follows:
1. For each corner charge, the distance to the center of the rectangle is sqrt(2) * L / 2, since this is the diagonal distance from one corner to the center.
2. Using Coulomb's law, we can calculate the electric field created by each corner charge at the centre of the rectangle as follows:
E = k * q / r^2
E = k * q / (sqrt(2) * L / 2)^2
E = (2 * k * q) / L^2
3. Since two of the electric fields will point in the same direction and two will point in the opposite direction, subtract the magnitudes of the two opposing electric fields and add the two remaining electric fields together to find the net electric field at the center of the rectangle.
Net electric field = (2 * k * q) / L^2 - (2 * k * q) / L^2 + (2 * k * q) / L^2 - (2 * k * q) / L^2
Net electric field = 0
4. In this case, since the magnitudes of the opposing electric fields cancel out, the net electric field at the center of the rectangle is zero.
Note that this is just an example calculation and the specific values and dimensions of the rectangle and charges will affect the final result.
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Given the two displacement
D=(6i +3j -k )
E=(4i - 5j +8k)
Find the magnitude of displacement 2D -E
The approximate value of the magnitude of the displacement vector 2D - E is roughly 16.88.
How to find the magnitude of the displacementIn order to find out the magnitude of the displacement vector 2D - E, you can use these steps:
multiplying D by 2. this would result to
12i + 6j - 2k
subtracting E from 2D. this would result to
8i + 11j - 10k
The calculation of Step three entails computing the magnitude of 2D - E where |V| = sqrt(Vi^2 + Vj^2 + Vk^2)
|2D - E| = sqrt((8^2) + (11^2) + (-10^2))
|2D - E| = sqrt(64 + 121 + 100)
|2D - E| = sqrt(285),
|2D - E| = 16.88 when rounded off to two decimal places.
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identify the factor that are causing change in habitat
Answer:
There are many factors that are causing change in habitats. But, the main one would be deforestation. Deforestation is where, people go and chop down a whole bunch of trees in a specific area to create more land, and for wood. But, this isn't always good, because it destroys animal's homes that are living either in the tree, or on top of the tree, etc.
Explanation:
Answer:
these changes can happen for different reasons. Some of the changes happen because something that people do or because of weather patterns or a natural disaster. Animals and plants in habits are affected by any change that happens to an environment
Calculate the radius of each ball to the nearest tenth. Use the formula r = d/2 where r is the radius and d is the diameter. Record the average in Table A of your Student Guide. What is the radius of the table tennis ball? cm What is the radius of the golf ball? cm
Answer:
What is the radius of the table tennis ball?
⇒ 2.1 cm
What is the radius of the golf ball?
2.0 cm
Explanation:
divide the radius and round it to the nearest 10th place..... but hope that help ;)
Answer:
1) What is the radius of the table tennis ball?
2.1 cm
2) What is the radius of the golf ball?
2.0 cm
Explanation:
Did this on Edge 2023 and got it right. Hope this helps :)
at which point is the object most likely to land assuming that it was subject to air resistance
The point at which the object from a free fall is mostly likely to land on the ground assuming that it was subject to air resistance is that point when the upward force of the air resistance of the object equals the force of gravity downward wise.
What is meant by air resistance?Air resistance simply refers to that special force which is made manifest in an opposite direction to an object moving through air. In order words, it is a kind of force which exert a frictional force against an object in motion.
That being said, from the context of the problem given above, this body will land the moment it attains what we call a terminal velocity.
In conclusion, we can now confirm and deduce from the explanation made from above that until the terminal velocity is achieved before the object on a free fall will be able to land ignoring air resistance.
The complete image is attached.
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Mrs Turner has a scale drawing of her apartment.IN the scale drawing the lenght of her apartment is 6.25 inches and the width is 2.75 onches. If Mrs. Turner used the scale factor 1 inc/18ft, what would the area of the apartment be?
The area of Mrs. Turner's apartment is approximately 0.05304 square feet.
To find the area of Mrs. Turner's apartment, we need to convert the measurements from the scale drawing to the actual measurements in feet, using the given scale factor of 1 inch/18 feet.
Length of apartment in feet = 6.25 inches × (1 foot/18 inches) = 0.34722 feet
Width of apartment in feet = 2.75 inches × (1 foot/18 inches) = 0.15278 feet
Now, we can calculate the area of the apartment in square feet by multiplying the length and width:
Area of apartment in square feet = Length × Width = 0.34722 feet × 0.15278 feet = 0.05304 square feet
Therefore, the area of Mrs. Turner's apartment is approximately 0.05304 square feet.
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Which of the following best explains the greater difficulty in stopping a 1000-kg car
moving at 174 km/h compared to an identical 1000-kg car moving at 100 km/h?
Stopping a 1000 kg car moving at a speed of 174 km/h will be more difficult than stopping an identical car moving at 100 km/h.
This can be explained by using Newton's second law of motion which says that the rate of change of momentum of a body is equal to the force applied.
We know that momentum of a body is the product of its mass and velocity.The momentum of the car moving at 174 km/h = \(1000\, kg \times 174\, km/h = 174000 \, kg.km/h\).The momentum of the car moving at 100 km/h = \(1000\, kg \times 100\, km/h=100000 kg.km/h\).Therefore, the car moving at 174 km/h has higher momentum and from Newton's second law of motion, a higher force would be required to stop this car.
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Galaxies that are 400 million light years away have a red shift of 0.03 approximately. A radio wave coming from one of these galaxies has an observed wavelength of 125 meters. What is the emitted wavelength in meters and the observed frequency in Megahertz
Answer:
The correct answer is "121.36 meters and 2.40 MHz".
Explanation:
Given:
Red shift,
\(\frac{v}{c}=\frac{\lambda - \lambda_0}{\lambda_0} = 0.03\)
Wavelength,
\(\lambda = 125 \ meters\)
The observed frequency will be:
⇒ \(f = \frac{c}{\lambda}\)
\(=\frac{3\times 10^8}{125}\)
\(=24\times 10^5\)
\(= 2.40\times 10^6\)
\(=2.40 \ MHz\)
hence,
The Emitted wavelength will be:
⇒ \(\frac{125-\lambda_0}{\lambda_0} =0.03\)
\(\frac{125}{\lambda_0}-1 =0.03\)
\(125=1.03 \ \lambda_0\)
\(\lambda_0=\frac{125}{1.03}\)
\(=121.36 \ m\)
how do all organisms begin life
Answer:
All organisms begin their lives as single cells.Overtime,these organisms grow and take on the characteristics of their species...All organisms grow,and different parts of organisms may grow at different rates.Organisims made out of only one cell
may change little during their lives, but they do grow
Explanation:
brainlest me please
Propose 4 reasons why society should support scientific research (use an example to support each of your reasons).
Answer:
Scientific research can promote the raise of the productivity of the society.Which means it can help people produce more goods in a much shorter time and better quality.
From the perspective of a country, if scientific research will not be supported, that country will face a highly pressure and threaten from other counties due to the technology advancement.Technology development will largely determine the military and economic power of a country.
From personally view,our next generation need to be good educated with support.A large part of the area will focus on scientific research,so if we want our children to perform better than us and create a better future.We need to support the scientific research.Nowadays, the AI technology is a very good example that society should support the scientific research. In the long run, we not only benefit from the progress and facility,but we can harvest from the investment into the AI scientific research.
Not the least,scientific research will help human being to know the unknown things in the society,that deep understanding will contribute ourselves to get better way to get along with the new environment and new world.
Explain how gravity is at the center of many of the motion and force equations. How does gravity impact sound waves.
Answer:
Gravity is at the center of many motion and force equations because it is a fundamental force that affects the motion of objects in the universe. The force of gravity can be described by Newton's law of gravitation, which states that two objects in the universe are attracted to each other with a force proportional to the product of their masses and inversely proportional to the square of the distance between them.
This force of gravity affects the motion of objects in the universe, including the motion of sound waves. Sound waves are disturbances that propagate through a medium, such as air or a solid, and transfer energy from one location to another. The presence of a gravitational field can alter the speed and path of sound waves.
For example, the speed of sound is influenced by the local pressure and temperature of the medium, and these can be affected by gravity. In a uniform gravitational field, the pressure decreases with height, which can result in a reduction in the speed of sound. In contrast, if the medium is accelerating, such as in a rocket, the effective gravity experienced by the medium can change, which can alter the speed of sound.
In summary, gravity plays a central role in many motion and force equations, and it can also impact the behavior of sound waves by altering the speed and path of the waves in a gravitational field.
Explanation:
Gravity is one of the four fundamental forces and it attracts all the matter with mass.
What is the interaction between gravity and sound wave?Contrary to popular belief, heavy metal music isn't actually heavy. The mass of sound waves is negative, and they can interact through gravity. So, sound rises, to put it another way.
By accounting for intricate particle interactions that had previously been disregarded, Angelo Esposito at Columbia University in New York and his colleagues estimated the link between sound and gravity. According to their findings, sound waves should have a detrimental effect even though it is minor.
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7. Imagine you could look at the flashlight from behind your object, looking
from the darkest and lightest parts of the object's shadow. How much of
the light source do you think you could see from each location?
From the darkest part of the object's shadow, you would be able to see a small amount of the light source. There would be a small amount of light that is visible, but it would be faint. On the other hand, from the lightest part of the shadow, you would be able to see much more of the light source. The light source would be far brighter and more visible, and you would be able to identify the source of the light.
Hope this helps! Have a nice day. :)find iy, va, vb, and vc in the circuit below. you can use any teachnique you learned to solve this problem
To find iy, va, vb, and vc in the circuit below, you can use the techniques of Kirchhoff's Voltage Law (KVL) and Kirchhoff's Current Law (KCL). By using these two laws, you can find the unknowns in the circuit by setting up a system of equations.
KVL states that the algebraic sum of all the voltages around any loop of a circuit must equal zero. KCL states that the algebraic sum of all the currents into and out of any node must equal zero.
For example, if the circuit is labeled in a clockwise direction, the equation for KVL can be written as V1 + V2 + V3 = 0, and the equation for KCL can be written as I1 + I2 = I3.
Once the equations are set up, you can solve for iy, va, vb, and vc by using substitution or elimination.
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PLEASE SAVE ME FROM THIS PHYSICS QUESTION (WILL MARK BRAINLIEST)
A 21 kg child is riding a 5.9 kg bike with a velocity of 4.5 m/s to the northwest.
- What is the total momentum of the child and the bike together?
- What is the momentum of the child?
- What is the momentum of the bike?
Answer:
See Below
Explanation:
Mass of child = 21 kg
Mass of bicycle = 5.9 kg
Total mass = 22 + 5.9 = 27.9 kg
Velocity = 4.5 m/s
1) Total momentum of the child and the bike together
= Total mass * Velocity
= 27.9*4.5
= 125.55 kg m per second
2) Momentum of the child
= Mass of child*Velocity
= 21*5.9
= 123.9 kg m per second
3) Momentum of the bike
= Mass of bike*Velocity
= 5.9*4.5
= 26.55 kg m per second
String 1 in the figure has linear density 2.60 g/m and string 2 has linear density 3.30 g/m. A student sends pulses in both directions by quickly pulling up on the knot, then releasing it. She wants both pulses to reach the ends of the strings simultaneously.
What should the string length L1 be?
What should the string length L2 be?
Explanation:
We can use the formula for the speed of waves on a string:
v = sqrt(T/μ)
where v is the speed of the wave, T is the tension in the string, and μ is the linear mass density (mass per unit length) of the string.
Let's denote the tension in both strings by T. Since the pulses must reach the ends of both strings simultaneously, we must have:
L1/v1 = L2/v2
where L1 and L2 are the lengths of the strings, v1 is the speed of the wave on string 1, and v2 is the speed of the wave on string 2.
Using the formula above and solving for T, we can eliminate T from this equation to get:
sqrt(μ1/ T)/ L1 = sqrt(μ2/T)/ L2
Squaring both sides and rearranging, we obtain:
L2/L1 = sqrt(μ2/μ1)
Substituting the given values for μ1 and μ2, we get:
L2/L1 = sqrt(3.30/2.60) = 1.126
Solving for one of the lengths, say L1, in terms of the other, we get:
L1 = L2/1.126
Now we need to find the values of L1 and L2 that satisfy the condition that both pulses reach the ends of the strings simultaneously. To do this, we can use the fact that the time it takes for a wave to travel a distance L on a string is given by:
t = L/v
where v is the speed of the wave on the string.
Therefore, if the pulses are to arrive at the ends of the strings simultaneously, we must have:
L1/v1 + L2/v2 = 2L1/v1
Simplifying this equation using the relation L1 = L2/1.126 and the formula for v, we get:
sqrt(T/μ1)L2/1.126/2.60 + sqrt(T/μ2)L2/3.30 = 2L2/1.126sqrt(T/μ1)
Simplifying further and eliminating T, we obtain:
L2 = (2.60/3.30)^2(1.126) L1
Substituting the expression for L1 in terms of L2 that we found earlier, we get:
L2 = (2.60/3.30)^2(1.126) L2/1.126
Solving for L2, we find:
L2 = 2.196 L1
Finally, using the relation L1 = L2/1.126, we get:
L1 = 1.91 m
L2 = 4.20 m
Therefore, the length of string 1 should be 1.91 m and the length of string 2 should be 4.20 m in order for both pulses to reach the ends of the strings simultaneously.
What is the total charge of barium oxide?
2. You are traveling along a highway at night at a speed of 100 km/h when you spot an object directly in front of you in the road at the limit of your headlights. (10 Marks)
a) If the maximum braking deceleration that your car can provide is 7 m/s2, and if your headlights extend out to a range of 30 m, will you hit the object before coming to a stop?
b) How long will it take to stop?
a) To determine if the car will hit the object before coming to a stop, we need to calculate the distance required to stop the car, assuming maximum braking deceleration. We can use the following formula:
d = (v^2) / (2a)
where:
d = distance required to stop
v = initial velocity
a = acceleration/deceleration
In this case, v = 100 km/h = 27.78 m/s (converted from km/h to m/s)
a = -7 m/s^2 (negative sign indicates deceleration)
We know that the car's headlights extend out to a range of 30 m, so if the distance required to stop the car is greater than 30 m, the car will hit the object before coming to a stop.
Plugging in the values to the formula, we get:
d = (27.78^2) / (2 x -7) = 108.61 m
Since 108.61 m is greater than 30 m, the car will hit the object before coming to a stop.
b) To calculate the time required to stop, we can use the following formula:
t = v / a
where:
t = time required to stop
v = initial velocity
a = acceleration/deceleration
Plugging in the values, we get:
t = 27.78 / 7 = 3.97 s
Therefore, it will take 3.97 seconds to stop the car.
On a map each inch represents 25 miles what is the length of a highway if it is 6 inches long on a map
Answer:
150 hope this helps
Explanation:
Answer:
150
Explanation:
Two gliders collide on an air track. Glider 1 has a mass of 7.0 kg, and glider 2 has a mass of 4.0 kg. Before the collision, glider 1 had a velocity of 2.0 m/s, and glider 2 had a velocity of -5.0 m/s. If the collision is perfectly elastic, what is the total kinetic energy of both gliders after the collision?
A. -36.0 J
B. 36.0 J
C. 64.0 J
D. 128.0 J
Answer:
Its C
Explanation:
My teacher did it for me and it was right.
A bullet train traveling at 2.5m/s, takes 30 minutes to get to the station.
What was the train's acceleration in m/s^2?
Answer:
\(a=-0.001388\ m/s^2\)
Explanation:
Given that,
Initial speed of a train, u = 2.5 m/s
Finally, it reaches the station, v = 0 (at rest)
Time, t = 30 minutes = 1800 s
Acceleration is equal to the rate of change of velocity. So,
\(a=\dfrac{v-u}{t}\\\\a=\dfrac{0-2.5}{1800}\\\\a=-0.001388\ m/s^2\)
So, its acceleration is \(0.001388\ m/s^2\).
crane lifts a 400 kg crate upward with an acceleration of 3.00 m/?. Determine the force on the crane.
The crane is under 5120 N of force. The crane touches the rock boulder and uses mechanical force to lift it.
What are the units of a force?Force is a physical phenomenon that can change an object's shape as well as its state of motion or rest. The SI unit of force is the Newton.
Cranes fall under which of the following three forces?Jib, gantry, and overhead cranes are the three pieces of machinery used most frequently in the industry. Depending on the type of item to be moved, either a chain or wire rope hoist will be used. In the shipbuilding sector, material handling is the main use of overhead cranes during the assembly process.
Briefing:
Mass (m) = 400kg
Acceleration (a) = 3.00 m/s^2
Gravitational acceleration (g) = 9.81 m/s^2
Force (F) = mg + ma
Force (F) = m (g + a)
Force (F) = 400 (9.81+3)
Force (F) = 5120 N
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M ộ t canô xuôi dòng t ừ b ế n A đế n b ế n B v ớ i t ố c độ v 1 = 30km/h; r ồ i ng ượ c dòng t ừ B v ề A v ớ i t ố c độ v 2 =20km/h. Tính t ố c độ trung bình trên l ộ trình đ i – v ề c ủ a canô
Answer:
fslkgndfjlxbndxvb, xn
Explanation: