Jenny is out trimming her hedges with a hedgetrimmer that has a 1500W power rating. If it takes her a half hour to finish her chores and the cost of electricity is 12cents/kWh, how much will it cost to make the front of her house beautiful?

Q: What is the minimum work that a motor must do to lift a 50 lb object from the floor to a height of…

A: CONCEPT: We know,              work done = force x displacement      So, work done  W=F×d Where,…

Q: person lifted a bag of groceries 2.89 m from the floor onto a counter top using a constant force of…

A:

Q: Assuming that the diet of an average Canadian consists of 2,000 food calories per day (1 food…

A: Given data :- diet of an average person Canadian = 2,000 food calories per day 1 food cal = 4200 J…

Q: An average-sized home refrigeration unit has a 1/19−hp fan motor for blowing air over the inside…

A:

Q: A building is 20 by 15 m and 15 m tall. You want to install a 10-kW wind turbine. How tall of a…

A:

Q: 3) How much energy does a 100-W light bulb use in 8.0 hours?

A: we use the concept of                                       1000W = 1 unit…

Q: Suppose that your refrigerator consumes 150 W of power. If the cost of electricity is $0.15 per…

A:

Q: 6. A 2,500 kg airplane can accelerate on the runway from rest to 250 mph in 15 seconds. What is the…

A:

Q: A 0.95 kilogram object is 145.43 meters above the ground. What is the object's potential energy at…

A: m = 0.95 kg h = 145.43 m

Q: 7. An electric motor with an efficiency of 80% has a power output of 4.00 horsepower. The power…

A: Given, Output power = 4 horsepower. Efficiency = 80% Motor runs for = 3 hour Charges = $0.15 per kWH…

Q: You are renting a car to take a road trip from Ottawa to Halifax, about 1400 km. The car rental…

A:

Q: What is the potential energy of an airplane that is only 0.5489 km off the ground and weighs 4120 kg

A: Given that, an airplane that is only 0.5489 km off the ground. That means  Distance, d = 0.5489 km…

Q: A certain handcrank generates power at 75W. How long will it need to be run to fully charge a…

A: Power: The energy per unit time is known as power. Power = Energy/time

Q: You run a washing machine (512 W) and an electric clothes dryer (5000 W) for 1.5 h each daily. (a)…

A:

Q: How much energy does a 100-W light bulb use in 80.0 hours? O 13 kWh O 800 kWh O 8.0 kWh 0.80 kWh

A: Given data:  Power (P) = 100 W Time (t) = 80.0 h Required: Energy (E)

Q: How many grams of matter would have to be totally destroyed to run a 100-W lightbulb for 3.0 y?…

A: Step 1: Step 2: Step 3: Step 4:

Q: A 1200 W toaster takes one minute to toast a slice of bread. At 7.0 cents/(kW-h), how much does the…

A: Have a look dear

Q: You place an ice cube in a microwave oven. If it requires 32,165 J to melt the ice cube and the oven…

A: Given data:  Energy (E) = 32,165 J Power (P) = 98 W Required: Time in minutes

Q: How long would it take a 125 Watt motor to lift a 21 kg crate up to the top of a 15 meter tall…

A:

Ohm's law

Ohm’s law is a prominent concept in physics and electronics. It gives the relation between the current and the voltage. It is used to analyze and construct electrical circuits. Ohm's law states that the voltage across a conductor is directly proportional to the current flowing through it.

Path of Least Resistance

In a series of alternate pathways, the direction of least resistance is the actual or metaphorical route that offers the least resistance to forwarding motion by a given individual or body.