What force causes riders to feel heavy and weightless on a roller coaster?

a. the force of gravity

c. the normal force

b. a combination of air resistance and friction

d. None of the above.

You have measured the distance from Syene to Alexandria to be 493 miles, and you approximate Alexandria to be due north of Syene. This distance is the same fraction of Earth's circumference as the fraction of the full circle from part B is.

An aircraft maintenance technician walks past a tall hangar door that acts like a single slit for sound entering the hangar. Outside the door, on a line perpendicular to the opening in the door, a jet engine makes a 610 Hz sound.

Is a compound a pure substance? Why or why not

When you let go of a rubber band, stored elastic energy is transformed into what kind of energy?

A hole is drilled to the center of the earth and a ball is dropped into it. When the ball is at the earth's center, compared with their respective values at the earth's surface,

Which type of electromagnetic waves have longer wavelengths that the waves that make up visible light.

A charge of 11 mu or micro CC is 10 cm above the center of a square of side length 20 cm. Find the flux through the square.

A 12.0 khz, 16.0 v source connected to an inductor produces a 4.00 a current. what is the inductance?

The personal cost per smoker per year is estimated to be $2,500.

A tight rope walker traverses a wire with the aid of a balancing pole. The moment of inertia of the person about their COG (Iperson) is 15 kg m^2. The moment of inertia of the pole about its COG (Ipole) is 250 kg m^2.