What happens to an object's velocity if there is work done by a friction force? Why?

Identify two forms of friction that oppose the motion of a moving car

Measuring which physical property is most likely to produce the most precise results when trying to identify a substance? luster hardness density viscosity

A student places two charged objects in your each other. The objects repel each other. The student concludes that the object must both the negative. Do you agree? Explain.

One job of the ___ gland is to secrete hormones that begin the production of eggs and sperm.

All BUT one of these factors influence the intensity of a sound wave. That is A) the density of the medium. B) the amplitude of the wave. C) the source of the sound wave. D) your distance from the sound source

The acceleration of an object is proportional to which of the following? the mass the energy of the object the inverse of the mass the inverse of the force applied

Suppose you squeeze a sponge into a small ball. does the mass of the sponge change? Does it's density change?

A solid round bar with diameter of 2-in has a groove cut to a diameter of 1.8-in, with a groove radius of 0.1-in. the bar is not rotating.

If a pilot pulls her 12.0 kg rollaboard suitcase along the ground with a force of 25. N for 10 M. The handle she pulls on makes an angle of 36.5 degrees with the horizontal. How much work does she do over the ten meter distance?

What happens to the density when water is poured into a empty glass?