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A man normally consumes 8.4 MJ of food energy per day. He then begins running a distance of 9four times per week. If he expends energy at the rate of 450 W while running at 12 km/hr, how much more food energy should he consume daily in order to maintain constant weight?
Imagine a figure that shows a system of two masses connected by a string. As m falls a distance h, M accelerates up the plane. What is the work done by friction on the system
A student decides to move a box of books into her dormitory room by pulling on a rope attached to the box. The student now starts moving the box up a 10.0° incline, what is the new acceleration of the box
Consider a tennis ball cannon people use to practice their game: what is the approximate wavelength of these tennis balls
What is the wavelength of the spectral line? B) Assuming this line is from a transition from level n1 = 3 to level n2 = 2 (i.e. the longest wavelength Balmer series transition), what do you calculate for the value of Rydberg constant.
find the magnitude of her centripetal acceleration. A small box is held in place against a rough vertical wall by someone pushing on it with the force directed upward at 27{rm ^circ} above the horizontal.
A three-step cycle is undergone by 3.8 mol of an ideal diatomic gas: the gas is then contracted at constant pressure back to its original volume. Throughout the cycle, the molecules rotate but do not oscillate. What is the efficiency of the cycle
Two 34.8-cm metal rods, one made of copper and one made of aluminum, are placed end to end, touching each other. How far does the other end of the system of rods move
8.0 moles of an ideal monatomic gas are compressed from a volume V1 = 0.26 m3 to V2 = 0.13 m3 at a constant pressure of 90 kPa
Two blocks are connected by a string. The smooth inclined surface makes an angle of 35 degrees with the horizontal, and the block on the incline has a mass of 5.70 kg. The mass of the hanging block is m= 2.90 kg. Find the direction of the hanging blo..
We have a container of compressed air. Assume that air is a diatomic ideal gas. The volume of the container is 1.35 liters. Find the final volume of the gas
q1. two people are carrying a uniform wooden board that is 3.00 m long and weighs 160 n. if one person applies an
A hotel elevator ascends 273 m with a maximum speed of 3.78 m/s. Its acceleration and deceleration both have a magnitude of 0.91 m/s2. How long does it take to make the complete trip from bottom to top?
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