The horizontal and vertical components of the initial velocity of a football are 16 m/s and 20 m/s respectively. How long does it take for the football to rise to the highest point of its trajectory?

A) 1.0 s
B) 2.0 s
C) 3.0 s
D) 4.0 s
E) 5.0 s


B

Physics & Space Science

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A. 1.98 K B. 0.180 K C. 157 K D. 0.160 K

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Why doesn't the Moon have an atmosphere?

A. The blasts that formed the craters blew it away. B. The Moon's atmosphere was drawn away from it by Earth's stronger gravitational force. C. It had very few volcanoes and the gravity is too weak to hold a substantial atmosphere. D. The solar wind evaporated the Moon's atmosphere.

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Indicate whether the statement is true or false

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An ideal solenoid having 200 turns and carrying a current of 2.0 A is 25 cm long. What is the magnitude of the magnetic field at the center of the solenoid? (?0 = 4? × 10-7 T ? m/A)

What will be an ideal response?

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