What is Hunter the dog's centripetal acceleration when he runs along a circular path of radius 2.0 meters with a tangential speed of 2.2 meters/second?

Why does a magnet exert a force on another magnet when the two magnets are not in contact?

What is the value of free falling acceleration?

Which of the following was confirmation that Wegener's hypothesis was correct? A. Magma in the asthenosphere B. Seafloor spreading C. Mountain belts on different continents match up

Which of the following would be best used as an electrical insulator? A. copper B. silver C. salt water D. wood

A laptop can convert 400J of electrical energy into a 240J of light and sound. What is the efficiency? Where does the rest of the energy go?

Suppose a large truck on a hydraulic lift exerts 7,000 N of force on a piston with an area of 0.4 m2. The piston can only support 16,000 Pa of pressure. How much pressure is exerted by the truck on the piston?

A lamp hangs vertically from a cord in a descending elevator that decelerates at 1.7 m/s2. (a) if the tension in the cord is 63 n, what is the lamp's mass? (b) what is the cord's tension when the elevator ascends with an upward acceleration of 1.

A possible means of space flight is to place a perfectly reflectingaluminized sheet into orbit around the Earth and then use the lightfrom the Sun to push this "solar sail." Suppose a sail of area5.

Why must indirect evidence be used to study the structure of atoms?

Which of the following refers to the change in wavelength that occurs when an object moves toward or away from a source? A) Doppler effect B) Chromatic aberration C) Spectroscopy D) Wave theory of light