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A steel rod is used to transfer heat from a chamber at 300 K to a chamber at 250 K. Which of the following changes in the setup will result in the greatest increase in the rate of heat transfer?
a what would be the length of one day if the earth spun so fast that bodies floated at the equator? radius of the earth
A particle moves along the x axis. It is initially at the position 0.330 m, moving with velocity 0.250 m/s and acceleration -0.280 m/s2. Find its velocity at the end of this time interval
Consider three identical metal spheres, A, B, and C. Sphere A carries a charge of +10q. Sphere B carries a charge of -7q. Sphere C carries no net charge. How much charge ends up on sphere C
A silver coin lies on the bottom of a clear lake 5.5 m deep. The coin is 4 cm in diameter. What is the angle of refraction
A 29 cm long solenoid, 1.8 cm in diameter, is to produce a 0.24 T magnetic field at its center. If the maximum current is 5.7 A, how many turns must the solenoid have
A person who weighs 715 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. find the area of contact between each tire and the ground
A 2.00-m tall basketball player is standing on the floor 10.0 m from the basket. If he shoots the ball at a 40 degree angle from the horizontal, at what initial speed must he throw the ball so that it goes through the basket without striking the b..
As measured in an inertial coordinate system S, what are the initial velocities of the protons measured in an inertial coordinate system S' in standard orientation and moving as speed V=0.9c relative to S
Light from an argon laser strikes a diffraction grating that has 5 310 grooves per centimeter. calculate vthe wavelength of the laser light
Snowboarder Sherry of mass m is pulled up a slope at constant velocity v by a tow bar. The force of the tow bar is parallel to the slope, find the force that the two bar exerts on Sherry
An object is 24.2 cm from the center of a silvered spherical glass Christmas tree ornament 5.90 cm in diameter. What is the magnification of its image
An airplane has a mass of 1.7x10^6kg and the air flows past the lower surface of the wings at 96 m/s. If the wings have a surface area of 1200m^2, how fast must the air flow over the upper surface of the wing if the plane is to stay in the air?
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