A bicyclist starts down a hill with an initial speed of 2.0 m/s. She moves down the hill with a constant acceleration, arriving at the bottom of the hill with a speed of 8.0 m/s. If the hill is 12 m long, how long did it take the bicyclist to travel down the hill?


2.4 s

Physics & Space Science

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An electric razor in Europe completes 50 vibrations in 1 s. The frequency of these vibrations is

A) 50 Hz with a period of 1/50 s. B) 1/50 Hz with a period of 50 s. C) 50 Hz with a period of 50 s. D) 1/50 Hz with a period of 1/50 s.

Physics & Space Science

Group characteristics - Lewis symbol

The Lewis symbol SCM1 would be characteristic of which group?

a. 2A
b. 4A
c. 3A
d. 5A

Physics & Space Science

If molecules in the sky scattered orange light instead of blue light, sunsets would be colored

A) orange. B) yellow. C) green. D) blue. E) none of the above

Physics & Space Science

An aluminum foil 0.10 mm thick has how many aluminum atoms per square cm? (The density of aluminum is 2.7 × 103 kg/ m3 and the atomic mass of aluminum is 27.)

A) 6 × 1017 B) 6 × 1020 C) 6 × 1024 D) 6 × 109 E) 6 × 1030

Physics & Space Science