How much energy does the paper require igniting
A convex lens having a 5 cm radius is employed to focus sunlight on a piece of paper to a spot 1 mm in diameter. When it takes 5 second for the paper to begin burning, then find out how much energy does the paper require igniting?
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A student bends out of a window 50 feet above the ground beneath and drops from his left hand a 1 lb lead sphere and from his right hand a 10 lb lead sphere concurrently. i) Determine how long will it take 1 lb sphere to strike the ground?
The person sees the ray as it skims just over the surface of the liquid. Find out how fast is the light traveling in the liquid? (x = 3.00 cm)
Draw cost and revenue functions and locate regions of profit and loss. Compute break even points using quadratic formula before you create graph.
The bat does 70.0 J of work on the ball in hitting it and applies a non-conservative force. Avoiding air resistance, find out the speed of the ball after the ball leaves the bat and is 25.0 m above the point of collision.
The roller-coaster car is moving at 20 m/s all along a straight horizontal track. Determine what will be its speed after climbing a 15 m hill, when friction is ignored?
The uniform electric field having a magnitude of 125 000 N/C passes via a rectangle with sides of 2.50 m and 5.00 m. The angle among the electric field vector and the vector normal to the rectangular plane is 65.0°. Determine the electric flux
The worker on the left weighs 275 N and the worker on the right weights 325 N. The scale measures the force on the tight rope at 425 N. Determine what would be the reading of a scale measuring the force on the left rope?
A radiant heater of 1500 W is build to operate at 110 V. Determine how much thermal energy is generated in 1 hour by the heater? Deduce the answer in calories and joules.
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