The engine of a 1500kg car does 30000J of work while the car drives
A car drives down a road at a constant speed of 30 mph. While maintaining this speed, the car travels around a sharp curve in the road. Does the car experience acceleration during this process? why or why not?
While sitting at a bus stop, a car drives past you going to the right with a speed v. Less than a minute later, the same car drives past you to the left at the same speed v. Assume that the contents of the car didn't change between those two times. What can you say about the net work done on the car between those two times ? (Neglect Friction)
- If a gas-filled piston in a car engine does work on the surrounding engine parts, how does the internal energy of the gas inside the piston change? - If your hot coffee sits on your desktop and loses 50kj of energy during cooling, what is the change of enthalpy of the coffee? - Under what condition will the change in enthalpy equal the change in internal energy for a given chemical system? Thank you so much!
A car drives up an incline. The
force diagram of the car is shown in the figure. The force F is
generated by the engine. The Force N is the normal force on the
car. The force Ffriction is the kinetic friction on the car. The
Force mg is the gravitational force on the car. For each of the
four forces on the car, draw a diagram including only that force
vector and the car’s displacement vector. Determine whether the...
Plz Explain. Thanks!
Question 2 1 pts While sitting at a bus stop, a car drives past you going to the right with a speed v. Less than a minute later, the same car drives past you to the left at the same speed v. Assume that the contents of the car didn't change between those two times. What can you say about the net work done on the car between those two times? (Neglect Friction) It is positive It...
While sitting at a bus stop, a car drives past you going to the right with a speed v. Less than a minute later, the same car drives past you to the left at the same speed v. Assume that the contents of the car didn't change between those two times. What can you say about the net impulse on the car between those two times ? a It points right b It points left c It is zero d...
A 1250 kg car drives up a hill that is 16.2 m high. During the drive, two nonconservative forces do work on the car: (i) the force of friction, and (ii) the force generated by the car's engine. The work done by friction is -2.91 times 10^5 J; the work done by the engine is 6.64 times 10^5 J. Find the change in the car's kinetic energy from the bottom of the hill to the top of the hill.
A police car drives past you with its siren on. While the car is approaching, you hear a frequency of 550 Hz. A Recalling that the speed of sound is 767 mph, what is the speed of the police car if the siren has a frequency of 507 Hz when neither you nor the car are moving? B What would the apparent frequency of the siren be if you were driving toward the parked police car at this same speed....
A heat engine does 222.83 J of work per cycle while exhausting 615.71 J of heat to the cold reservior. If a Carnot engine operating with a hot reservior temperature of 493.2 oC has the same efficiency, what is the cold reservior temperature in degrees Celsius?
A heat engine does 264.08 J of work per cycle while exhausting 676.45 J of heat to the cold reservior. If a Carnot engine operating with a hot reservior temperature of 422.95 oC has the same efficiency, what is the cold reservior temperature in degrees Celsius?