A soccer ball is released from rest at the top of a grassy incline. After 8.6 seconds, the ball travels 87 meters and 1.0 s after this, the ball reaches the bottom of the incline
(a) What was the magnitude of the ball's acceleration, assume it to be constant?
(b) How long was the incline?
a) 2.4 m/s2 b) 110 m
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At about what frequency is Earth struck by a meteorite large enough (about 10 km in diameter) to cause mass extinctions?
A) about every 1 million years B) about every 10 million years C) about every 100 million years D) This has yet to occur on Earth.
If the orbital velocity of an eclipsing binary is 97 km/sec and the smaller star is completely eclipsed in 2 hours, what is the diameter of the smaller star?
a. 175,000 km b. 350,000 km c. 194 km d. 700,000 km e. 4656 km
If the redshift of a quasar were 3, at what wavelength would the 486.1-nm line of hydrogen appear in the quasar's spectrum?
What will be an ideal response?
What is the self-inductance of an ideal solenoid that is 300 cm long with a cross-sectional area of 1.00 × 10-4 m2 and has 1000 turns of wire? (?0 = 4? × 10-7 T ? m/
A) A) 4.19 nH B) 4.19 pH C) 4.19 ?H D) 41.9 nH E) 41.9 µH