A batter hits a home run in which the ball travels 110 m horizontally with no appreciable air resistance. If the ball left the bat at 50° above the horizontal just above ground level, how fast was it hit?
What will be an ideal response?
33 m/s
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An exerciser lifts 10.00 N weights a vertical distance of 50.00 cm. How many times would the exerciser have to lift the weight to use 10.00 Calories of energy?
A. 7,503 B. 4,125 C. 5,170 D. 8,370 E. 9,670
Genetic studies indicate that every living organism on Earth today shares a common ancestor
Indicate whether the statement is true or false
Chemically, helium is
A) an isotope. B) an element. C) a mixture. D) a solid. E) a compound.
A current-carrying loop of wire lies flat on a horizontal tabletop. When viewed from above, the current moves around the loop in a counterclockwise sense. For points on the tabletop inside the loop, the magnetic field lines caused by this current
A) circle the loop in a clockwise direction. B) circle the loop in a counterclockwise direction. C) point straight up. D) point straight down.