A laser beam takes 24 ms to travel from a rocket to the reflective surface of a planet and back to the rocket. How far is the rocket from this planet's surface? (c = 3.0 × 108 m/s)
A) 1800 km B) 1200 km C) 3600 km D) 4800 km E) 2400 km
C
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In each of the cases shown below, determine the direction of the magnetic field that is causing the charged particle to experience the magnetic force shown.
A. Forward
B. Backward
C. Rightward
D. Leftward
E . Into the paperF . Out of the paper
T . Impossible
The Kepler mission has been able to measure dimmings of less than 0.01% in a star's brightness. This has allowed us to detect what size planets?
A) planets smaller than Earth B) planets Earth-size only C) only planets larger than Earth D) any size planet, as long as they are in binary star systems
A 1200-kg automobile moving at 25 m/s has the brakes applied with a deceleration of 5.0 m/s2 . How far does the car travel before it stops?
a. 39 m c. 55 m b. 31 m d. 63 m
Which of the following wavelengths could NOT be present as a harmonic on a 2 m long string?
a. 4 m b. 2 m c. 1 m d. 0.89 m e. 0.5 m