Arace car, traveling at constant speed, makes one lap around a circular track of radius r in a time t. the circumference of a circle is given by c = 2(π)r. which one of the following statements concerning this car is true? the average speed of the car over any time interval is equal to the magnitude of the average velocity over the same time interval. the average velocity of the car is the same over any time interval. the average speed of the car is the same over any time interval the displacement of the car does not change with time. the instantaneous velocity of the car is constant.

the chart show the masses and velocities of two colliding objects that stick together after a collision.

according to the law of conservation of momentum, the momentum of the object after the collision is  

answer

1,500

kg • m/s.

i think the answer is a, hope this : )

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.