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The temperature at a point 50 km north of a station is 3 degree C coolor than at the station. If the wind is blowing from the northeast at 20 m s^-1 and the air is being heated by radiation at the rate of 1 degree C H^-1, what is the local temperature change at the station.
An electric motor is rated to have a maximum power output of 0.68 hp. how fast (i.e., at what speed) can it lift the crate
An astronaut on earth can throw a ball straight up to a height of 13m. How high can he throw the ball on Mars
Multiple-Concept Example 8 provides useful background for part b of this problem. What is the angular displacement (in rad) of each wheel
A 2120 kg car moving east at 10.7 m/s collides with a 3240 kg car moving east. The cars stick together and move east as a unit after the collision at a velocity of 6.48 m/s.
A helium balloon lifts a basket and cargo of total weight 2080 N under standard conditions, What is the minimum volume of the balloon
The leaves of a tree lose water to the atmosphere via the process of transpiration. What is the speed of the sap flowing in the vessels
A 3.00-kg block starts from rest at the top of a 33.5° incline and slides 2.00 m down the incline in 1.80 s. (a) Find the acceleration of the block. m/s2 (b) Find the coefficient of kinetic friction between the block and the incline. (c) Find the fri..
A 240-kg speedboat is negotiating a circular turn (radius = 36 m) around a buoy. During the turn, the engine causes a net tangential force of magnitude 590 N to be applied to the boat. The initial tangential speed of the boat going into the turn is 7..
Heat engines take input energy in the form of heat, use some of that energy to do work, and exhaust the remainder. Determine the magnitude of the heat the athlete gives off
What is the magnetic field amplitude of an electromagnetic wave whose electric field amplitude is 15V/m
A cubical Gaussian surface surrounds charges, q1=6.0 x 10-12C, What is the electric flux passing through the surface
What average thermal power is produced as rock stops?
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