A horizontal line on the time axis of a speed vs. time graph means an object is ___.

a) not moving

b) moving in a constant speed

c) moving at a constant velocity

A 1500kg car moves foward with 30kg•m/s of momentum. What is its velocity Select one •-1470m/s •0.02m/s •45,000m/s •-50m/s

Why does a moving object come to a stop on a frictional surface? a. The object's kinetic energy is transformed into mainly heat energy. b. The object's potential energy is transformed into mainly kinetic energy. c.

Give the general name for the type of quantity that has magnitude and acts in a particular direction.

A flat (unbanked) curve on a highway that has a radius of 50 m. A car rounds the curve. The car has mass 4,907 kg. The static coefficient of friction between the curve and the car is 0.35. What is the maximum speed of the car to prevent sliding?

Identify the number of protons, neutrons, and electrons in a natural atomof a given element.

How does increasing the amount of charge on an object affect the electric force it exerts on another charged object?

A diffraction grating is illuminated simultaneously with red light of wavelength 670 nm and light of an unknown wavelength. The fifth-order maximum of the unknown wavelength exactly overlaps the third-order maximum of the red light.

Four soccer players are running down the field at the same speed. Player 1 weighs 145 lbs and is running toward the north goal, player 2 weighs 175 lbs and is running toward the south goal, player 3 weighs 155 lbs and is running toward the south

Pure water has a hydrogen ion concentration of 1 x 10 (-7) M and a ph of 7. A student measures a basic solution and finds that it has a hydrogen ion (H+) concentration of 1 x 10 (-3).

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