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.

The black mamba is one of the world's most poisonous snakes, and with a maximum speed of 18.0 km/h, it is also the fastest. Suppose a mamba waiting in a hide-out sees prey and begins slithering toward it with a velocity of + 18.0 km/h. After 2.

A 1.30 m cylindrical rod of diameter 0.550 cm is connected to a power supply that maintains a constant potential difference of 14.0 V across its ends, while an ammeter measures the current through it. You observe that at room temperature (20.

Determine the mechanical energy of this object; a 1-kj ball rolls on the ground at 2m/s a. the ball is on the ground, so the mechanical energy is zero b. 2j c. 1j d. 4j

Why does blood make a complete loop in our bodies?

What is any energy resource that can be used in place of fossil fuels called

if 100 grams is equal to 1 newton of force, and the water displaced by an object would have a mass of 40 grams, what is its buoyant force on that object?

A charge if 2 nC is placed 10cm to the right of a conducting sphere with a diameter of 2 cm. A charge of 5 nC is placed 10 nC to the left of the same sphere. determine the charge at the center of the sphere.

1) How is chemical energy transformed into potential energy?

A double-paned window has two glass panes separated by a layer of air. Why is air, rather than glass, used to fill this space?

To determine waves frequency you must know the what