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Q1. To calculate the program, suppose she runs up a flight of 85 steps, each 0.150 m high, in 69.0 s. For ease, ignore an energy she uses in coming down (which is small). Assume that a typical efficiency for human muscles is 20.0 percent. This means that while your body converts 100 J from metabolizing fat, 20 J goes into doing mechanical work (here, climbing stairs). The remainder goes into internal energy. Assume the student's mass is 53.0 kg.
Q2. An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 37 mm and 92 mm. The electric potential of the inner conductor regarding the outer conductor is -574 V.
In bouncing off a racket, a 50 g tennis ball had its velocity changed from 15 m/s in the forward direction to 20 m/s, how long was the ball in contact with the racket
Two 14.0cm -diameter electrodes 0.50cm apart form a parallel-plate capacitor, What is the potential difference between the electrodes after insulating handles are used to pull the electrodes away from each other until they are 1.9cm apart
a proton is moving in a circular path with a radius of 8.28 cm and is moving perpendicular to a magnetic field of 57.9 mT. determine the kinetic energy of the proton
A proton initially at rest is accelerated by a uniform electric field. Find the voltage drop through which the proton moves
A 0.289-kg coffee mug is made from a material that has a specific heat capacity of 990 J/kg C° and contains 0.304 kg of water. determine the minimum power rating of this heater
A 100-W electric-resistance heater inside the tank is energized for 10 minutes. Calculate the mass of CO2 in the tank and the temperature and pressure in the tank at the end of the 10 minutes period
The objective lens of a telescope is a symmetric glass lens with 100cm radii of curvature. The eyepiece lens is also a symmetric glass lens. What are the radii of curvature of the eyepiece lens
If the rocket gases are expelled at a speed of 2010 m/s, explain how much mass must be expelled?
Starting from the top left corner and moving clockwise the charges are -10 uC, -10 uC, 5 uC, and 5 uC. What is the electric force on the top left charge due to all the other charges
03.3 A boat is heading upstream when a float is dropped overboard and carried downstream. What is the boat's speed in still water?
When light of a certain waveleght is incident normally on a certain diffraction grating the line of order 1 ia at a diffraction angle 25 Degrees
An engine absorbs 1.69 kJ from a hot reservoir at 277 °C and expels 1.24 kJ to a cold reservoir at 27 °C in each cycle. What is the power output of the engine if each cycle lasts 0.298 s
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