Which would you expect to have the greatest amount of friction?

a - a smooth surface on a smooth surface

b-a smooth surface on a rough surface

c-a rough surface and air

d-a rough surface on a rough surface

James Prescott Joule demonstrated that work could generate heat using his churn. In order to truly demonstrate that energy is conserved, the next logical step would have been to convert that heat entirely back to work. why was this not done?

f the plasma membrane of an animal cell was made entirely permeable to Na, the Na / K pump would continue to pump ions and hydrolyse ATP, but not build a Na gradient. True or False

The ratio of displacement to distance is

What is a property of matter that can be measured or observed using the 5 senses

A stockroom worker pushes a box with mass 11.2 kg on a horizontal surface with a constant speed of 3.30 m/s. The coefIficient of kinetic friction between the box and the surface is 0.25.

What is the density of watermelon juice

If the energy of the wave becomes part of the internal energy of the object, then the wave's energy is

3. A stone is thrown upward at an angle. What happens to the horizontal component of its velocity as it rises

A sealed of gas at 101,000 Pa is expanded, reducing the volume from 0.5m3 to 0.25m3.

Explain one effect that burning fossil fuel has on the environment