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A projectile is launched from ground level at 90 m/s at an angle of 48.0 degrees above the horizontal, and it is subject only to gravity (in free fall, air resistance ignored).
a) What is the time the rocket reaches the peak height of its trajectory.
b) The horizontal range of the rocket from the launch point.
c) The max height above the ground the rocket reaches.
d) Horizontal and vertical speeds of the rocket from the top trajectory.
A sample of 23892U is decaying at a rate of 455 decays/s . The half-life is 4.468E9yr. compute the mass of the sample
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q1. a ball on a porch rolls 60 cm to the porchs edge drops 40 cm continues rolling on the grass and ultimately stops 80
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