How much heat (Wh = 3600 J) is generated at the brakes in stopping a 1000...
If a blend of gasoline has an energy content of 11,670 Wh/kg, how much fuel (in gal) is needed to convert 353 gal of water at 81.3oC to steam at 100oC? Assume all of the energy of the fuel is completely transferred to the water. The density of the fuel is 0.777 g/mL. 1 Wh is equivalent to 3600 J.
A 2500 kg car is traveling 25 m/s and brakes to a stop. This causes the brakes to heat up as the car’s kinetic energy is converted to thermal energy. If the heat in the brakes could be captured and applied to ice at 0 degrees Celsius, how much could it melt?
A 1000 kg travelling at 25 hits the brakes and skids fo 100 meters before coming to a stop. • How much work is done by the force of friction in stopping the car? • What is the magnitude of the friction force? • What is the coefficient of friction?
When a driver brakes an automobile, friction between the brake disks and the brake pads converts part of the car's translational kinetic energy to internal energy. If a 1260 kg automobile traveling at 30.8 m/s comes to a halt after its brakes are applied, how much can the temperature rise in each of the four 3.5 kg steel brake disks? Assume the disks are made of iron (cp = 448 J/kg·°C) and that all of the kinetic energy is distributed...
Assume that the kinetic energy of a 1000 kg car moving at 125 km/h could be converted entirely into heat.What amount of water could be heated from 16 ∘C to 52 ∘C by the car's energy? Express your answer using two significant figures.
Lend has a specific heat of 128 J/kg°C. A lead bullet is moving at 650 m/s. If the bullet is suddenly stopped so that all of its kinetic energy is converted into heat, determine the temperature that the lead bullet reached before it was stopped. Take the initial temperature of the bullet to be 30 °C.
Assume that the kinetic energy of a car with a mass of 1350 kg moving at 150 km/h could be converted entirely into heat. What amount of water could be heated from 25 ∘C to 48 ∘C by the car's energy? Recall that 4.184 J is required to heat 1 g of water by 1∘C
At 1 atm, how much energy is required to heat 0.0550 kg of ice at -22.0 °C to steam at 129.0 °C? STRATEGY 1. Calculate the energy needed for each temperature change or phase change individually. A. The energy needed to heat 0.0550 kg of ice from -22.0 C to its melting point. B. The energy needed to melt 0.0550 kg of ice at its melting point C. The energy needed to heat 0.0550 kg of liquid water from the...
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(e) A car of mass 1000 kg is travelling up a 50 gradient at initial speed 10 m s-1, with the engine off. The brakes are applied at this time and the car travels distance s along the road before stopping. Friction in the brakes causes an increase in internal energy of 3 x 104 J. No energy transfer to or from the car occurs. Find distance s.
The specific heat of water is 4186 J/kg C0. How much does the internal energy of 200 g of water change as it is heated from 200C to 300C? Assume the volume is constant