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Although there are many mechanisms that help large mammals (such as elephants) keep cool in hot climates, the size of ears is a big factor. The Asian elephant's ears are about 20% smaller than the ears of the African elephant. If the radiant loss of heat through the billions of capillaries in elephant ears is the primary means of staying cool, estimate the relative temperature difference between the territory of African elephants versus the territory of Asian elephants.
When you push a 1.95kg book resting on a tabletop it takes 2.50N to start the book sliding. Once it is sliding, though, it takes only 1.50N to keep the book moving with constant speed. What are the coefficients of static and kinetic friction betwe..
A ball is thrown upward from a platform 4.6 m high with a speed of 16 m/s, What is the magnitude of its velocity when it hits the ground
An image of a biological sample is to have a resolution of 5 nm. (i) What is the kinetic energy of a beam of electrons with a de Broglie wavelength of 5.0nm.
a base for a building column measures 18.0 in. by 18.0 in. on a side and 12 in. high. compute the cross-sectional area
A 7 kg ball has a velocity of 16 m/s. How much work would be required to stop the ball
A 12 V battery is connected by a switch (not shown) in series to an inductor (inductance 400 mH) and a resistor (resistance 250 ohms). what is the rate of change of current
Two boxes of mass 6.10 and 5.00 kg are in contact and are accelerated across a horizontal surface by an force of 43.17 N applied parallel to the surface and pushing on the lighter box. What is the magnitude of the force exerted by the heavier box o..
Treating the pulley as a uniform disk, determine the speeds of the two objects as they pass each other.
If you throw a .038 kg ball at a speed of 10.9 m/s and at an angle of 43.5 above the horizontal from a 14.8m high building, what will its kinetic energy be when it hits the ground
A top loading washing machine has a spin cycle that rorates at frequency f. The spinning drum that holds the clothes has a radius R, Find an expression for the magnitude of the wall's normal force acting on the piece of clothing as the drum spins
Two teams of nine members each engage in a tug of war. The first team's members have average masses of 70 kg and exert average forces of 1350 N horizontally, What is the acceleration of the two teams
An automobile tire has a radius of 0.325 m, and its center moves forward with a linear speed of v = 24.8 m/s. Determine the angular speed of the wheel
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