Mary is trying to determine the charge of an object in the lab. She observes that it is repelled by a positively charged rod. What can you say about the charge of the object?

Two objects are moving at equal speed along a level, frictionless surface. the second object has twice the mass of the first object. they both slide up the same frictionless inclined plane. which object rises to a greater height?

Complete this equation that represents the process of nuclear fusion. Superscript 226 Subscript 88 Baseline R a yields Superscript A Subscript B Baseline R n + Superscript 4 Subscript 2 Baseline H e A: B:

Whats the velocity of a ball falling with 100joules of kinetic energy and a mass of 2 kilograms?

What is a circuit, s resistance if 12v produces 2A of current?

As your rockets went upwards how would you describe how the energies changed?

Two forces of intensities 3 N and 4 N act simultaneously on a body. If these forces have the same direction and sense, what is the intensity of the resulting force?

Ch 31 HW Problem 31.63 10 of 15 Constants In an L-R-C series circuit, the source has a voltage amplitude of 116 V, R = 77.0 Ω, and the reactance of the capacitor is 473 Ω. The voltage amplitude across the capacitor is 364 V.

Calculate the force at sea level that a boy of mass 50 kg exerts on a chair in which he is sitting.

A 25 kg girl steps off a diving platform that is 2 m high. Neglecting the effects of friction, what is the girl's speed just before she hits the water? A. 2.0 m/s B. 6.3 m/s C. 39 m/s D. 490 m/s

What three ways does the respiratory system modify air before it reaches the lungs?