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A baseball is hit so that it travels straight upward after being struck by the bat. A fan observes that it takes 3.20 s for the ball to reach its maximum height.
(a) Find the ball's initial velocity.
(b) Find the height it reaches.
An air column in a glass tube is open at one end and closed at the other by a movable piston. The air in the tube is warmed above room temperature, and a 356 Hz tuning fork is held at the open end. Resonance is heard when the piston is at a distan..
A child goes down a playground slide with an acceleration of 1.22. Find out the coefficient of kinetic friction between child and slide if the slide is inclined at an angle of 31.0 below the horizontal.
The spacecraft's mass is 291 kg and the thrust (force) of the rocket engines is 59 N. If the speed of the spacecraft should be decreased by 128 m/s, how long the engines should be fired. (Ignore the change in mass as a result of the rocket engines..
What is the velocity of each ball. while both pipes vibrate at their fundamental frequencies, a beat frequency of 15 Hz is heard. How many centimeters were cut off the end of the second pipe? The speed of sound is 343 m/s.
A block of wood with volume V floats in water with 0.68V submerged. determine the density of the oil and wood
What is magnitude of the unknown force
A Toyota Prius driving north at 61 and a VW Passat driving south at 42 are on the same road heading toward each other.
At an outdoor market, a bunch of bananas attached to the bottom of a vertical spring of force constant 16.0 N/m, What is the weight of the bananas in newtons
If a person radiates about 67 W of power at room temperature, how long does it take for a person to radiate away the energy acquired by consuming a 260 Calorie donut?
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
An oscillating LC circuit has a current amplitude of 7.50 mA, a potential amplitude of 250 mV, and the capacitance of 220 nF. What are (a) the period of oscillation.
They then turn together around the spindle with their centers superposed. What is an angular frequency in of the combination.
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