An antitank weapon fires a 3.0 kg rocket which acquires a speed of 50. m/s after traveling 90. cm down a launching tube. Assuming the rocket was accelerated uniformly, what force acted on it?
A) 4.2 kN
B) 3.6 kN
C) 2.8 kN
D) 2.0 kN
E) 5.8 kN
A
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If two objects are the same size, but one object has a temperature 3 times as hot (in Kelvin) as the other object, the hotter object emits
A) 3 times as much energy. B) 9 times as much energy. C) 12 times as much energy. D) 81 times as much energy. E) 27 times as much energy.
A 2.00-g bullet traveling at 700 m/s hits and becomes embedded in a stationary 5.00-kg wood block. What is the speed of the block immediately after the bullet has stopped moving relative to the block?
What will be an ideal response?
How wide must a narrow slit be if the first diffraction minimum occurs at ±12° with laser light of 633 nm?
a. 3.0 × 10^?6 m b. 3.0 × 10^?5 m c. 6.1 × 10^?6 m d. 6 .1× 10?5 m e. 1.5 × 10^?6 m
The eccentricity of a planet's orbit describes
a. westward motion in the night sky when observed on successive nights. b. the deviation in shape when compared to a circle. c. its tilt with respect to the ecliptic plane. d. the tilt of the planet's rotational axis with respect to the ecliptic.