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Q1. An archer shoots an arrow with a velocity of 45.0m/s at an angel of 50.0 with the horizontal. An assistant standing on the level ground 150m downrange from the launch point throws an apple straight up with the minimum initial speed necessary to meet the path of the arrow. - What is the initial speed of the apple? b- At what time after the arrow launch should the apple be thrown so that the arrow hits the apple?
Q2. A jewel thief hides a diamond by placing it on the bottom of a public swimming pool. He places a circular raft on the surface of the water directly above and centered over the diamond.If the surface of the water is calm and the pool is h = 1.52 m deep, find out the minimum diameter of the raft that would prevent the diamond from being seen.
suppose a gas that absorbs solar radiation has a uniform mixing ratio of 1g kg^-1 and an absorption cross section of 5m^2kg^-1. At what altitude will the maximum rate of energy absorption per unit volume occur
Find maximum height reached by the diver using the equation of motion.
At what angle should the road bank on the curve so that no frictional force is required by a vehicle travelling around the curve at the speed limit.
Three 18-cm-long rods form an equilateral triangle. find the electric field strength at the center of the triangle
To help you think about how illuminance varies with distance, suppose a small light source is placed at the center of two transparent spheres. how much of the light passes through the first sphere
The top and bottom margins of a poster are 4 cm and the side margins are each 5 cm. find the dimensions of the poster with the smallest area
A light beam is incident on heavy flint glass (n = 1.62) at the polarizing angle. Calculate the angle of refraction for the transmitted ray
What is the electric potential energy of three equal positive charges of 1.33 µC while they are arranged to form a triangle 2.10 x 10-3 m on a side.
A centrifuge is rotating at 10,000 revolutions/minute. It is brought to rest in 4.00 seconds under a constant acceleration. Determine the initial angular velocity of the centrifuge in rad/sec
A 2.1 kg solid sphere ( I= 0.4mR2 ) rolls along a horizontal surface with a speed of 7.8 m/s. What is the total kinetic energy of the sphere
The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates.
Two small non conducting spheres have a total charge of 85.2. When placed 1.09 apart, the force each exerts on the other is 10.4 and is repulsive. What is the charge on each.
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