A racecar driver steps on the gas, and his racecar travels 20 meters in 2 seconds starting from rest. The acceleration of the racecar is __________
Fill in the blank(s) with correct word
10 m/s2
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In the H-R diagram, what are the two most important types of data plotted?
A) sizes and temperatures B) luminosities and masses C) absolute and apparent magnitudes D) apparent magnitudes and temperatures E) spectral classes and absolute magnitudes
Two fireworks explode at the same position on the 4th of July. A stationary observer notices that the time interval between the two events was 5.00 seconds. A second observer flies past the fireworks at a speed of 0.600c. What value does she obtain when she measures the time interval between the two explosions?
a. 8.33 s b. 6.25 s c. 4.00 s d. 3.00 s e. 5.00 s
Uniform Circular Motion: A runner runs on a circular path of radius 10 m. What is the magnitude of the displacement of the jogger if he runs(a) half-way around the track?(b) all the way around the track?
Fill in the blank(s) with the appropriate word(s).
A spherical fruit has a radius of 3.23 cm. What is the volume of the fruit in cubic meters?
A) 1.41 × 10-4 m3 B) 1.41 m3 C) 4.23 × 10-4 m3 D) 4.23 m3