Valleys form mainly from

Total charge is uniformly distributed on a spherical surface of radius R. The sphere is centered at the origin and spins around the z axis with angular velocity 0. Assume magnetic permeability u, everywhere.

What is the best description of black body radiation? Select the correct answer. radiation that comes from a heated object radiation that's always invisible radiation from an object with a high electrical charge gamma radiation from interstellar

A 55-kg person on skis starts from rest down a hill sloped at 35° from the horizontal. The coefficient of friction between the skis and the snow is 0.12. After the skier had been moving for 5.

Which object has the greatest inertia? * 6-kg bag of feathers 5-kg rock 8-kg bowling ball 7-kg bag of groceries

A student is standing 8 m from a roaring truck engine that is measured at 20 dB. The student moves 4 m closer to the engine. What is the measured sound intensity at the new distance? dB

Imagine you are on a bus with a helium balloon tied on a string tied to the seat in front of you. the bus stops short to avoid running over a rabbit and you are thrown forward. what happens to the balloon in relation to the bus? 1. the balloon pops.

Give one reason why the density of iron is higher than the density of oxygen

In which region of the periodic table do the elements NOT normally react chemically with other elements? A. metals B. metalloids C. nonmetals D. noble gases

A hot air ballon was a mass of 400 kilograms moves across the sky with 3200 joules of kinetic energy. the velocity of the balloon is

What Is a mineral made of oxidized hydrogen