A non reactive metal can be identified from other metals because it's surface is?

A rock slides down from A to B along the inside surface of a frictionless hemispherical bowl. As the rock slides, mechanical energy is conserved (ignoring air resistance) because: (Mark all that apply.

What is the S. I. unit of drift velocity and electron mobility?

Ludo doesn't believe in cheating on school work, but then he took a French test and everyone else was cheating, so he did it, too. Now, he tells himself that cheating is usually bad, but sometimes it is O. K. This is an example of:

Priscilla is driving her car on a busy street and Harvey passes her on his motorcycle. What will happen to the sound from his motorcycle after it passes her car? O A. The frequency of the sound will decrease. OB.

Sam, whose mass is 75 kg, straps on his skis and starts down a 50-m-high, 20 frictionless slope. A strong headwind exerts a horizontal force of 200 N on him as he skies. Use work and energy to find Sam's speed at the bottom.

A hot-air balloon is 150 feet above the ground when a motorcycle passes directly beneath it (traveling in a straight line on a horizontal road). The motorcycle is traveling at 40 mph.

How do I calculate initial speed by using the slope of a graph? The graph shows the relationship between S { (sin2ϴ) / g} and the average range of a projectile in meters.

You push a 50 kg wooden box across a wooden floor at a constant speed of 1.0 m/s. The coefficient of kinetic friction is 0.15. Now you double the force on the box. How long would it take for the velocity of the crate to double to 2.0 m/s?

A star is in hydrostatic equilibrium when the outward push of pressure due to core burning is exactly in balance with the inward pull of gravity.

How are mass and weight different? a. Mass is the space an object takes up and weight is the effect of gravity on mass. b. Mass is the amount of matter and weight is the effect of gravity on mass. c.