When a device is used in a circuit in which the voltage is 81 V, the current flowing through the device is 3a. what is the resistance of the device?

A proton moves in a region of constant electric field. Does it follow that the proton's velocity is parallel to the electric field? Does it follow that the proton's acceleration is parallel to the electric field? Explain.

Ice tells scientists when global warming has occurred is like a book

Describe the main distinguishing features of spiral, elliptical, and irregular galaxies.

A 15,000-kg train car moving due east at 23 m/s collides with and couples to a 10,000-kg train car that is initially at rest. Find the common velocity of the two-car train after the collision. (East is defined as positive.

How does the nervous system allow you to run

Which of the following descibes the refraction of a wave?

A 590-kg rocket is at rest on the launch pad. what upward thrust force is needed to accelerate the rocket uniformly to an upward speed of 28 m/s in 3.3 s?

Is work being done when a hiker puts on a bag

run at the same speed and in the same direction, and they both run for the same amount of time, what can you say about the distance they travel?

How can you show positive body languages with your mouth