A hummingbird flies in circles around a bush. if the velocity of the hummingbird is 720 cm/s and the radius of the circular path is 9.0 cm, what is the centripetal acceleration of the hummingbird?

Sheila did 110 J of work to move a chair 2 m to the right. How much force did Sheila use to move the chair?

A 12 volt car battery produces more current than a 1.5 volt battery for a TV remote because ... A. the tv remote has more kinetic energy. B. the tv remote has a greater difference in electric potential energy. C.

How far is it to the stars

What does isotonic resistance training mean?

A student makes measurements from which she calculates the speed of sound as 327.66m/s She estimates that her result is accurate to + - 3% Which of the following gives her result expressed to the appropriate number of significant figures. A. 327.

A 68kg man is carrying a box with a mass of 7 kg what is the weight of the man and the box together

What does Newton's third law say about why momentum is conserved in collisions? 1. Equal forces act for unequal times, so the change in momentum for both objects must be equal. 2.

A notebook sitting on a desk has 19 j of potential energy. What is the total mechanical energy of the notebook?

If an electric circuit is not grounded, it is best to reach out and touch it to provide the ground

A 1.41 µF capacitor charged to 51 V and a 2.49 µF capacitor charged to 31 V are connected to each other, with the two positive plates connected and the two negative plates connected. What is the final potential difference across the 2.