### What is her useful power output

Assignment Help Physics
##### Reference no: EM13325575

Shoveling snow can be extremely taxing since the arms have such a low efficiency in this activity. Suppose a person shoveling a sidewalk metabolizes food at the rate of 700 W. (The efficiency of a person shoveling is 3%.)

(a) What is her useful power output?

W

(b) How long will it take her to lift 3000 kg of snow 1.20 m? (This could be the amount of heavy snow on 60.0 ft of sidewalk.)

s

(c) How much waste heat will she generate in the process?

#### Questions Cloud

 Determine how much energy is stored in the capacitor : A parallel-plate capacitor has plates with an area of 395 cm2 and an air-filled gap between the plates that is 2.29 mm thick. How much energy is stored in the capacitor What would be the length of one edge of that cube : If this amount were shaped into a cube, what would be the length of one edge of that cube (in meters) Explain monosubstituted benzene ring : Two isomeric compounds, A and B, are known to each have a monosubstituted benzene ring. Both have the formula C9H10O2 and both are insoluble in water. However, A dissolves in dilute aqueous NaOH, but B does not. Calculating internal rate of return : Calculate the net present value, go to the Function Wizard. The function you are going to use is in the function category of FINANCIAL and is NPV and calculating Internal Rate of Return What is her useful power output : Shoveling snow can be extremely taxing since the arms have such a low efficiency in this activity. What is her useful power output Evaluate anacomps business new product development strategy : Evaluate Anacomp's business new product development strategy. What are the risks and benefits of this strategy for Anacomp's shareholders and how is Anacomp's accounting influenced by the way the company organizes and finances its new product devel.. Find how long does it take for the boat to cross the river : A 200-m-wide river flows due east at a uniform speed of 4.5m/s. A boat with a speed of 9.0m/s relative to the water leaves the south bank pointed in a direction 28o west of north. How long does it take for the boat to cross the river Compute fraction of the energy was lost : One hockey puck of mass 0.2 kg strikes an identical stationary puck on a frictionless ice rink. what fraction of the energy was lost What is the magnitude of the maximum gravitational force : A bowling ball (mass = 7.2 kg, radius = 0.11 m) and a billiard ball (mass = 0.39 kg, radius = 0.028 m) may each be treated as uniform spheres

### Write a Review

#### Find the magnitude of the resulting magnetic field

A sphere of radius R is uniformly charged to a total charge of Q. It is made to spin about an axis that passes through its center with an angular speed ω. Find the magnitude of the resulting magnetic field at the center of the sphere.

#### Find the equivalent resistance

A resistor is in the shape of a cube, with each side of resistance  R . Find the equivalent resistance between any two of its adjacent corners.

#### What is the electric field at the location

Question: Field and force with three charges? What is the electric field at the location of Q1, due to  Q 2 ?

#### What is the maximum displacement of the bridge deck

What is the maximum displacement of the bridge deck?

#### What is the magnitude of the current in the wire

What is the magnitude of the current in the wire as a function of time?

#### Blackbody

Questions on blackbody, Infra-Red Detectors & Optic Lens and Digital Image.

#### Gravity conveyor

Illustrate the cause of the components accelerating from rest down the conveyor.

#### Calculate the dc voltage

Calculate the dc voltage applied to the circuit.

#### Quadrupole moments in the shell model

Quadrupole moments in the shell model

#### Determine the tension in each string

Determine the tension in each string

#### Introductory mechanics: dynamics

Calculate the smallest coefficient of static friction necessary for mass A to remain stationary.

#### Evaluate maximum altitude

Evaluate maximum altitude?