Heat is thermal energy that flows due to
A) molecular speed.
B) calorie imbalance.
C) temperature differences.
Answer: C
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A boy throws a ball with an initial velocity of 25 m/s at an angle of 30° above the horizontal. How high above the projection point is the ball after 2.0 s?
A) 5.4 m B) 13 m C) 25 m D) 43 m E) 50 m
Pressure is
A) proportional to both force and area. B) proportional to force and inversely proportional to area. C) inversely proportional to force and proportional to area. D) inversely proportional to both force and area. E) proportional only to area.
The pressure inside a commercial airliner is maintained at 1 ATM (1.01 × 10^5 N/m2). What is the outward force exerted on a 1.0 m × 2.0 m cabin door if the outside pressure (at 10 km height) is 0.3 ATM?
a. 1.4 × 10^2 N b. 1.4 × 10^3 N c. 1.4 × 10^4 N d. 1.4 × 10^5 N e. 7.0 × 10^3 N
Consider the events A, B, C, and D shown in the space time diagram below. What is the space time interval between events A and B?
A. 0 s
B. 2 s
C. 3 s
D. 4 s
E. 5 s
F. Other (specify)