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Q1. Blood is capable of carry excess energy from the interior to the surface of the body, where the energy is dispersed in a number of ways. As a person is exercising 0,6kg of blood flows to the surface of the body and releases 2000J of energy. The blood arriving at the surface has the temperature of the body interior (37 degrees Celsius) assume that the blood has the same heat capacity as water, establish the temperature of the blood that leaves the surface and returns to the interior.
Q2. A 35.0-g bullet moving at 475 m/s strikes a 2.7-kg bag of flour that is on ice, at rest. The bullet passes through the bag, leaving at 250 m/s. How fast is the bag moving while the bullet exits?
Q3. The path of an electron, travelling at 3.7 × 104 meters/second, is making the right angle to a magnetic field. A single electron experiences a force of 2.2 × 10-15 Newton's while in the field. What is strength of the magnetic field? The value of q = -1.6 × 10-19 coulombs.
An athlete completed a marathon in 2 h, 39 min, 41 s. Determine the average speed (in miles per hour) of the athlete.
A mass m1 = 3.2 kg rests on a frictionless table and connected by a massless string over a massless pulley to another mass m2 = 4.3 kg which hangs freely from the string, How much work is done by gravity on the two block system
a 12.0 g plastic ball is dropped from a height of 2.50 m, How much mechanical energy was lost during the balls fall
The second person, on the opposite side of the lock, pulls at an angle of 45o. Illustrate with what force should the second person pull so that the net force on the raft is in the forward direction?
A U-shaped tube is open to the air at both ends and is partially filled with Mercury (density = 13,600 kg/m3). Water (density = 1000 kg/m3) is poured into the left arm until the water is 10 cm deep. How long upward from its initial position does t..
The work done by an engine equals one-half the energy it expels to a cooler at 0C. what is the temperature of the heater
Jack and Jill exercise in a 25.0-m-long swimming pool. Find the average velocity and average speed of each swimmer
A 120-N child is in a swing that is attached to ropes 2.20 m long. Find out the gravitational potential energy associated with the child relative to her lowest position at the following times.
A motorist drives along a straight road at a constant speed of 22.0 m/s. Just as she passes a parked motorcycle police officer, Find the speed of the officer as he overtakes the motorist
A brave but inadequate rugby player is being pushed backward by an opposing player who is exerting a force of 800 N on him, What is the force of friction between the losing player's feet and the grass
You are given a parallel plate capacitor that has plates of area 4.00 m2 which are separated by 0.0100 mm of nylon, Calculate what the applied voltage in kV should be for this capacitor
A 0.810 kg particle has a speed of 2.60 m/s at point A and kinetic energy of 8.80 J at B. What is its speed at B? reply in units of m/s.
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