A pendulum clock has a pendulum shaft made of aluminum which has a coefficient of linear expansion of 24.0 × 10-6 K-1. At 22°C the period of swing of the pendulum is 1.00 s
If the temperature is reduced to 5°C, how much time does the clock gain or lose in one day? A) It gains 18 s per day.
B) It loses 18 s per day.
C) It gains 9.0 s per day.
D) It loses 9.0 s per day.
E) It neither gains nor loses time.
A
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The nuclear reactions in a star's core remain under control so long as
a. luminosity depends on mass. b. pressure depends on temperature. c. density depends on mass. d. weight depends on temperature. e. temperature depends on mass.
Jamal pulls a 250-N sled up a 29.0° slope at constant speed by a force of 200 N. Near the top of the hill he releases the sled. With what acceleration does the sled go down the hill?
a. 7.84 m/s2 b. 9.30 m/s2 c. 3.32 m/s2 d. 1.66 m/s2 e. 2.66 m/s2
The two moons of Mars are known as ____________________ and ____________________
Fill in the blank(s) with correct word
Vector V1 is (5i + 7j - 3k) and vector V2 is (7i + 2 j + 14k). The component of V1 parallel to the line of action of vector V2 is:
(A) -0.25i + 0.12j + 0.43k (B) 0.20i + 0.06j + 0.39k (C) -0.20i + 0.22j + 0.39k (D) -0.35i + 0.02j + 0.13k