A child throws a ball with an initial speed of 8.00 m/s at an angle of 40.0° above the horizontal. The ball leaves her hand 1.00 m above the ground. How long is the ball in flight before it hits the ground?
A)
1.22 s
B)
6.79 s
C)
7.45 s
D)
9.14 s
E)
2.44 s
A
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A) 3,500 K B) 5,800 K C) 12,300 K D) 300,000 K E) 15 million K
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A particle (mass = 6.7 × 10?27 kg, charge = 3.2 × 10?19 C) moves along the positive x axis with a speed of 4.8 × 105 m/s. It enters a region of uniform electric field parallel to its motion and comes to rest after moving 2.0 m into the field. What is the magnitude of the electric field?
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