e, 77 W of power and

Q: A refrigerator does 270,000 J of work in 30 minutes. How much power does it generate? 30 minutes =…

A:

Q: A weight lifter raises a 963 N weight a vertical distance of 1.87 m. Compute the work done by the…

A:

Q: What is the cost of operating a 5.00 W electric clock for a year if the cost of electricity is…

A:

Q: If electricity costs 10.0 cents per kW·h, how much does it cost to operate the device for 9.1 hours?…

A: Given: Cost of electricity is 10.0 cents for 1 kW.h. The device is operated for 9.1 hours. If you…

Q: A force of 35 N is applied to a 15.3 kg object. The object moves 3.69 m in the direction of the…

A:

Q: 1 Newton of force is applied to a stone to move 100 cm. Calculate the work done.

A: Given, Force = 1 N Displacement = 100 cm = 1 m Work done = ?

Q: Jenny is out trimming her hedges with a hedgetrimmer that has a 1500W power rating. If it takes her…

A: Let the power rating is denoted by P and the working time is given by t. Evaluate the energy (E)…

Q: What is the speed of a 137 kg woman running with a kinetic energy of 973.5 J?

A: kinetic energy =12mv2

Q: A 2063 KG car accelerates from rest to a velocity of 25M/S in 13 seconds. The power of the engine…

A: Given:- The mass of the car is m = 2063 kg  The car starts from rest and achieves a velocity of v =…

Q: What is the potential energy, in J, of a 0.625 kg basketball that is thrown up to a height of 4 m?

A: Answer: Given values, mass of the basketball (m)=0.625 KgHeight ( h)= 4.0 mPotential Energy = ?

Q: 1200 J of work was in lifting a box to a height of 3 m. What was mass of the box?

A:

Q: Which one of the following is NOT the unit of power? Watts Íb/s Nm/s O J/s

A: Power is rate of change of energy.

Q: What is the approximate cost of operating a 65 W light bulb for 3.0 h per day for 1 week, if the…

A: The given values are, P=65 Wthour/day=3.0 h/daytday=1 week=7 daysrate=14 cents/kWh

Q: How much power does it take a steam engine to do 6.8 × 10' J of work in 2.61 x 10° seconds? (answer…

A: Given data:  Work (W) = 6.8×107 J Time (t) = 2.61×108 s Required: Power (P)

Q: 3. A box (mass = 100 g) is initially connected to a compressed (x = 80 cm) spring (k = 100 N/m) at…

A:

Q: A microwave oven has a power requirement of 1,262 W. A frozen dinner requires 4.1 min to heat on…

A: Write the expression for the electrical energy. E=P×t Here, P is the power and t is the time.

Q: An electric water heater consumes 7.13 kW for 3.85 h per day. What is the cost (in dollars per year)…

A: An electric water heater consumes 7.13 kW for 3.85 h per day. In a year, the heater consumes…

Q: How long will it take a 25 W machine to produce 438 J of work?

A: Power(p)= Work/Time So, Time = Work/Power

Q: A computer uses 1.62 x 10^4 J in one hour. What is the power used?

A: The energy usage of device is 1.62 ×104J in one hour.    Power is the rate with respect to time at…

Q: A pallet weighing 575 N is lifted a distance of 20.0 m vertically in 10.0s. What power is developed…

A:

Q: A 1200W microwave oven transforms 1.8 x 10^5 J of energy while reheating some food. Calulate how…

A:

Q: An electric water heater consumes 5.63 kW for 2.85 h per day. What is the cost (in dollars per year)…

A: Given: The heater consumption of electricity is 5.63 kW for 2.85 h per day. The cost of electricity…

Q: A 2,263 kg car accelerates from rest to a velocity of 20 m/s in 13 seconds. The powwer of the engine…

A:

Q: What is the energy required to accelerate a 1655 kg car from rest to 25 m/s?

A: According to work energy theorem, the net work done on an object is equal to change in kinetic…

Q: How much power does it take to lift 40.0 N 11.0 m high in 6 s?

A: Given data:  Weight (mg) = 40.0 N Height (h) = 11.0 m Time (t) = 6 s Required: The power (P)

Q: What is the kinetic energy of a 1,904.53 kg car that travels at 7.92 m/s?

A:

Q: A frictionless cart is pulled 9.50 m up an inclined plane in 24.6 s. The power output of the motor…

A: Given S=9.50 m (displacement) T=24.6 s (time) P=3.30*102=330 W (Power of motor)

Q: The unit of Power (P) is

A: We have to answer the unit of Power (P)

Q: An electric water heater consumes 4.88 kW for 3.85 h per day. What is the cost (in dollars per year)…

A: In one day number of kWh used, 4.88×3.85=18.788 kWh

Q: A 300W computer is used for 90 minutes. What is the energy used in kWh? How much will it cost to run…

A: Given Data: The power used by the computer is: P=300 W The time duration in which P amount of power…

Q: If a 0.02 kg bullet is traveling 2 meters off the ground, what would the potential energy of the…

A: The expression for the potential energy is, P=mgh

Q: How much work is required to throw a ball with a mass of 0.44 Kg 23.4 m/s?

A: Here in this question we consider the ball initially is in rest.                 i.e. vi = 0 m/s.…

Q: A force of 45.5 N is applied to a 14.3 kg object. The object moves 3.76 m in the opposite direction…

A: The formula for the work done by the applied force is:

Q: If a hair dryer is rated at 1750 W, how much energy does it require in 6 minutes

A: Consider the energy consumed by the dryer in hour is, E=Pt Here, P is the power consumed and t is…

Instantaneous Power

Power is defined in physics as the amount of energy transmitted or transformed per unit time. The watt is the unit of electricity in the International System of Units, equivalent to one joule per second.