If an object falls with constant acceleration, the velocity of the object must
A) be constant also.
B) continually change by the same amount each second.
C) continually change by varying amounts, depending on its speed.
D) continually decrease.
E) none of the above
Answer: B
You might also like to view...
When a microwave filter consisting of vertical parallel metal rods is in the absorbing position, oscillating currents are set up in the rods. At any one instant, the current in each rod has the same magnitude and direction. At that instant
A. the rods will try to move apart horizontally. B. the rods will try to move together horizontally. C. the rods will try to shift vertically upwards. D. the rods will try to shift vertically downwards. E. the rods will not be affected because the source of current is not a battery.
You are moving past the Earth at 0.990c and notice your heart beating 88 beats per minute
(a) If a doctor on Earth measures your heart rate as you zip past, what will the measured rate be? (b) If you had been moving 99.99% the speed of light, what rate would you have observed your heart beats?
Most astronomical objects emit light over a broad range of wavelengths
Indicate whether the statement is true or false
A gas of helium atoms (each of mass 6.65 × 10-27 kg) are at room temperature of 20.0°C. What is the de Broglie wavelength of the helium atoms that are moving at the root-mean-square speed?
(h = 6.626 × 10-34 J • s, the Boltzmann constant is 1.38 × 10-23 J/K) A) 5.22 × 10-11 m B) 7.38 × 10-11 m C) 1.04 × 10-10 m D) 2.82 × 10-10 m E) 3.99 × 10-10 m