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A boy standing on top of a building throws a small ball from a height of H1 = 24.2 m. The ball leaves with a speed of 28.6 m/s, at an angle of 83.0° to the horizontal, and lands on a building with a height H2 = 38.0 m. Neglect air friction, and calculate for how long the ball is in the air?
A neutron star has a mass of 2.20 × 10^30 kg (about the mass of our sun) and a radius of 5.20 × 10^3 m. Assume an object falls from rest near the surface of such a star. How fast would it be moving after it had fallen a distance of 0.0083 m.
A 2 kg ball has been thrown vertically upward. If we ignore the air resistance, what are the direction and size of the net force acting on the ball while it is traveling upward?
A 5.0-, 0.732- wire is used to support two uniform 235- posts of equal length, What is the frequency of the sound this wire produces
q1. consider a person of mass 72 kg. what would his mass be if he was composed entirely of neutron-star material of
In a blade with an airfoil profile the total aerodynamic force acting on the blade when wind speed is 25 ft /sec is 50 lb, find the torque generated in the shaft
An RLC series circuit has a 202 ? resistor and a 25.0 mH inductor. At 8220 Hz, the phase angle is 45.0°. Find the minimum possible capacitance of the circuit
An isolated cylindrical capacitor consists of two concentric conducting cylinders of length L. The innder cylinder has a radius Ra and the outer cylinder has a radius Rb.
A 15 kg box is being pushed across the floor at 1.7 m/s to the right. When the pushing force is removed, find the frictional force exerted on the box by the floor
The collision is not head-on. After the collision, the two pucks fly apart with the angles shown in the drawing. Find out the final speed of puck A also Find out the final speed of puck B. m/s
A balloon inflated with helium (density .2 kg/m^3). If the density of air is 1.3 kg/m^3, what is the bouyant force exerted on the balloon
A ball is thrown directly downward with an initial speed of 8.60 m/s, After what time interval does it strike the ground
A pilot claims to have seen a UFO moving initially at a speed of about 465 m/s in an easterly direction and then, Compute the UFO's average acceleration during the turn
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