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A boy throws a ball vertically up wards with a velocity of 25 m/s while he was standing on a cliff on the way down it just misses the thrower and falls down on the ground if the height of the building was 49 m. Determine
a) the total time of flight?
b) the velocity which with it reaches the ground?
A ray of light is incident at an angle of 30 deg. to the normal on an air glass interface. find the angle the refracted ray makes to normal
A 100 g ball attached to a spring with spring constant 2.50N/m oscillates horizontally on a frictionless table. Its velocityis 20.0 cm/s when x = -5.00 cm. What is the amplitude of oscillation?
Jill has just gotten out of her car in the grocery store parking lot. The parking lot is on a hill and is tilted 3 degrees. How far has the cart rolled before Jill catches it
A water pump lifts water from a well depth of 30 to ground level. How much work does the pump do by moving 3 m^3 of water
Two charged dust particles exert a force of 6.5 x 10-2 Newton's on each other. Evaluate what will be the force if they are moved therefore they are only 1/8th as far apart
Constructive interference of sound waves occurs when:
a massless spring of spring constant 50 N/m is suspended vertically. Set the vertical origin to the natural length of the spring. what are the amplitude and frequency of the oscillations
A resistor (R = 900 ?), a capacitor (C = 0.25 µF), and an inductor (L = 2.0 H) are connected in series across a 240 Hz AC source for which ?Vmax = 125 V. compute the phase angle between the current and voltage
Two capacitors, C1 = 2x10^-6 F and C2 = 4x10^-6 F, are connected in series with an 18 V battery. Find the final charge and potential difference for each capacitor
Positive pressure is used in blood transfusions. Suppose a container of blood is placed 1m above a vein where the venous pressure is 0.3 kPa
A point source of light is located 6.6 m below the surface of a large pool of water. Find the area of the largest circle on the pool's surface through which light coming directly from the source can emerge
A cheetah is traveling across the African countryside, initially moving at a constant velocity of 15 m/s. What is the average acceleration of the cheetah from t = 0 to t = 4.0 seconds
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