wich following is not use of doppler effect? a, radar b, astronomy c, energy transmission d, blood floe measurment

A car goes around in a circular curve on a horizontal road at constant speed. what is the direction of the friction force on the car due to the road?

A 0.22 kg air track glider moving at 0.60 m/s a collides elastically into a 0.44 kg glider at rest. After collision the 0.22 kg glider is moving with velocity - 0.20 ms. What is the speed of the 0.44 kg glider after collision

What is the role of plants in the oxygen and nitrogen cycle

A speaker fixed to a moving platform moves toward a wall, emitting a steady sound with a frequency of 235 Hz. A person on the platform right next to the speaker detects the sound waves reflected off the wall and those emitted by the speaker.

What is a light-year equal to? A. the distance light travels in one year B. the time it takes light to travel 10 trillion kilometers C. the mean distance between the Sun and the center of our galaxy D.

A plane is flying east at 135 m/s. The wind accelerates it at 2.18 m/s^2 directly northeast. After 18.0s, what is the magnitude of the displacement of the plane?

The same constant force, F, is applied to two blocks. The first block has a mass of M and the second block has a mass of 2M. Both blocks are initially at rest and the force acts on each of them for the same period of time, t.

Which of the following is an example of the strong nuclear force acting in an atom? A. A proton repelling a proton B. A neutron attracting a neutron C. A neutron repelling an electron D. An electron attracting a proton

Does the air in our atmosphere have mass?

Your instructor hands you a closed flask partly filled with room-temperature water. When you hold it, the heat transfer between your bare hands and the flask causes the water to boil. Quite impressive! How is this accomplished?