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At the start of a race, a four-man bobsled team pushes their sled as fast as they can along a 50 m flat starting stretch. The net force that the four men together apply to the 325 kg bobsled is 86.77 N directed at 15 degrees below the horizontal. As they push, 60 N of kinetic friction opposes them. What is the speed of the sled right before the team jumps on the sled?
The diffusion constant for the alcohol ethanol in water is 1.24 10-9 m2/s. A cylinder has a cross-sectional area of 3.85 cm2 and a length of 1.86 cm. what mass of ethanol diffuses through the cylinder
If lithium ion Li+2 is treated as a classical system of one electron of charge ?e going around a nucleus of charge 3e on a circle of radius 1.77× 10?11 m, find the ionization energy of the electron
Object A, which has a mass m and a velocity v0, collides head-on with object B, which has a mass 2m and a velocity 1/2v0. Following the collision, object B has a velocity of 1/4v0. (a) Determine the velocity of object A after the collision. v = ? If ..
A uniform solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane. what is the height of the inclined plane
A household pays $1850 per year for the supplied electricity. find the average power of energy consumption
A toaster operating on 120 V uses a current of 15.0 A. What is the toaster's power consumption, what is the cost of using the toaster for 3.2 min
An object slides down a 30o angle slope from rest at a height of 15.0 m. What is the object's speed at the bottom of the slope
a series RLC circuit contains a resistor of 20 ohms, a capacitor of 0.75 mF and an inductor of 120mH, what is the rms current operating at its resonance freq.
A 3-kg steel ball strikes a wall with a speed of 13-m/s at an angle of 60.0° with the surface. It bounces off with the similar speed and angle. If the ball is in contact with the wall for 0.20s, what is the average force exerted by the wall on the..
A hot water stream at 80 degrees C enters a mixing chamber with a mass flow rate of 0.5kg/s where it is mixed with a stream of cold water at 20 degrees C. If it is desired that the mixture leave the chamber at 42 degrees C,
How much work did the movers do (horizontally) pushing a 190-{rm kg} crate 11.2 m across a rough floor without acceleration, if effective coefficient of friction was 0.60.
Al moves off with a speed of 8.98 m/sec in one direction and Jo moves off with a speed of 9.70 m/sec in the other. You can assume friction is negligible. What is Al's mass.
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