Assess the coefficient of kinetic friction
A 18.5-kg sled is being pulled across a horizontal surface at a constant velocity. The pulling force has a magnitude of 84.5 N and is directed at an angle of 30.0° above the horizontal. Determine the coefficient of kinetic friction.
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The load and the spring are taken down. Two people pull in opposite directions on the ends of the spring, each with a force of 190 N. Find the length of the spring in this situation.
If failed batteries are immediately replaced, what is the probability of more than one failure occurring during the first 5 hours of operation? Would you expect batteries to have a constant failure rate?
A certain alloy has a melting temperature of 1300 degree C. What is the minimum temperature that must be achieved for a forging operation on this material to be called hot working?
Consider a mixture of air and gasoline vaporin a cylinder with a piston. The original volumeis 30.cm3. If the combustion of this mixture releases 1081. J of energy, to what volume will the gases expand against a constant pressureof 645.
(a) If the speed of the pot as it passes Jill's window is 52.0 m/s, what was its speed when Jack saw it go by? (b) What is the height between the two window ledges?
Given that T_F=800K, T=293K, T_S=265K and Q_house=40kJ/h, determine Q_F utilizing heat pump technology. No other sources of energy may be used.
It will launch him in the air and he wants to come down so he just misses the last of a number of 1.00 m diameter barrels. If the speed at the instant when he leaves the ramp is 60.0 m/s, how many barrels can be used?
If electricity is valued at $0.08 per kW*h, what is the cost of the electrical input to the resistor for 20 min of operation?
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