A motorboat that normally travels at 8 km/h in still water heads directly across a 6-km/h flowing river. The resulting speed of the boat is about
A) 6 km/h.
B) 8 km/h.
C) 10 km/h.
D) 20 km/h.
Answer: C
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An automobile gas tank is filled to its capacity of 22.0 gallons with the gasoline at an initial temperature of 15.6°C. The automobile is parked in the Sun causing the gasoline's temperature to rise to 73.6°C. If the coefficient of volume expansion for gasoline is 9.60 × 10^?4/C°, what volume runs out the overflow tube? Assume the change in volume of the tank is negligible
a. 0.329 gallons b. 1.55 gallons c. 1.22 gallons d. 1.53 gallons e. 0.919 gallons
"I live 20 minutes from Center City." How is this statement similar to giving astronomical distances in light-years?
What will be an ideal response?
Mars' mass is only a tenth of the Earth's, and its density is also less than the Earth's
Indicate whether the statement is true or false
Three identical 50-kg balls are held at the corners of an equilateral triangle, 30 cm on each side
If one of the balls is released, what is the magnitude of its initial acceleration if the only forces acting on it are the gravitational forces due to the other two masses? (G = 6.67 × 10-11 N ? m2/kg2 ) A) 4.2 × 10-8 m/s2 B) 3.7 × 10-8 m/s2 C) 1.9 × 10-8 m/s2 D) 6.4 × 10-8 m/s2 E) 2.5 × 10-8 m/s2