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2 years ago

Which of the following is not true of the seasons?

Physics

1 answer:

Anit [1.1K]2 years ago

3 0

Summer does not start on the same day in every country on the earth

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A bike, a truck, and a train—all without passengers, motors, or engines—roll down the same hill. Put the vehicles in order from

Pepsi [2]

Answer: WAIT WHATTTT i have that same test due today and the answer is in explanation

Explanation:

Bike, truck train. we are in the same school i think. Its imma say the incisal JMES Im Lusi i used to help in the library

4 0

2 years ago

A ball of mass m on a string of length L is attached to a pivot. The ball is released from rest while the string is parallel to

mash [69]

Answer:

L/2

Explanation:

Neglect any air or other resistant, for the ball can wrap its string around the bar, it must rotate a full circle around the bar. This means the ball should be able to swing to the top position where it's directly above the bar. By the law of energy conservation, this happens when the ball is at the same level as where it's previously released vertically. It means the swinging radius around the bar must be at least half of the string length.

So the distance d between the bar and the pivot should be at least L/2

8 0

2 years ago

A mass of 3.6 kg oscillate on a horizontal spring with a spring constant of 160 N/m.

Darya [45]

Answer:

48.7 J

Explanation:

For a mass-spring system, there is a continuous conversion of energy between elastic potential energy and kinetic energy.

In particular:

- The elastic potential energy is maximum when the system is at its maximum displacement

- The kinetic energy is maximum when the system passes through the equilibrium position

Therefore, the maximum kinetic energy of the system is given by:

$KE=\frac{1}{2}mv^2$

where

m is the mass

v is the speed at equilibrium position

In this problem:

m = 3.6 kg

v = 5.2 m/s

Therefore, the maximum kinetic energy is:

$KE=\frac{1}{2}(3.6)(5.2)^2=48.7 J$

6 0

2 years ago

What is the power of a machine that pushes with a force of 3 n for a distance of 9 m in 8 s?

dalvyx [7]

The work done by the machine is equal to the product between the force applied and the distance over which the force is applieds, so in this case:
$W=Fd=(3 N)(9 m)=27 J$

And the power of the machine is equal to the ratio between the work done by the machine and the time taken:
$P= \frac{W}{t}= \frac{27 J}{8 s}=3.38 W$

4 0

2 years ago

Social science is a branch of science that deals with the nature of

prohojiy [21]

The answer is A. Human Society.

6 0

3 years ago