A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1000 W/m2 sunlight. What is the efficiency of the solar cell?

Determine how far will the boat move : Two people, one of mass 75 and the other of mass 65 , sit in a rowboat of mass 89. How far will the boat move |

A wheel is rotating about an axis : A wheel is rotating about an axis that is in the z-direction. The angular velocity is at , increases linearly with time and is at . We have taken counterclockwise rotation to be positive. |

Find the final speed of both pucks : Two pucks, A and B, are on an air hockey table. Puck A is moving with an initial velocity of 5.5m/s Eastward and Puck B is at rest and East of Puck A. Find the final speed of both pucks |

Explain the molar solubility in water be the same as hcl : For which of the following substances will the molar solubility in water be the same as that in an HCl or NH3 solution |

Determine what is the efficiency of the solar cell : A solar cell has a light-gathering area of 10 cm2 and produces 0.2 A at 0.8 V (DC) when illuminated with S = 1000 W/m2 sunlight. What is the efficiency of the solar cell |

To decrease the body temperature : To decrease the body temperature of a 66-kg person by 1.0 C , what mass of alcohol must be evaporated from the person's skin? Ignore the heat involved in raising the temperature of alcohol to its boiling point (why?) and approximate the human body as.. |

System when the stick is pivoted about axis perpendicular : A particle of mass 0.450 kg is attached to the 100-cm mark of a meter stick of mass 0.125 kg. The meter stick rotates on a frictionless, horizontal table with an angular speed of 2.00 rad/s. |

Find the work done by the machine : A machine does work at a rate given by Pct^2 , where c = 15W/s^2 and t is time. Find the work done by the machine between 15s and 20s? huh |

What is the speed at the bottom of the hill : a hoop of mass M=2 kg and radius R=0.4 m rolls without slipping down a hill. what is the speed Vfinal at the bottom of the hill |

## How much work was done on the roof by the forcesIn 1975 the roof of Montreal's Velodrome, with a weight of 360 kN, was lifted by 10 cm so that it could be centered. How much work was done on the roof by the forces making the lift. |

## Find the moment of inertia of the fanA fan is spinning at 900 rpm. When its motor is turned off it makes 75 rev before coming to a stop. Find the moment of Inertia of the fan |

## Calculate the speed of each particleAn electron and a proton are each placed at rest in a uniform electric field of magnitude 556 N/C. Calculate the speed of each particle 47.6 ns after being released |

## What is the maximum temperature reached during compression20 g of helium are placed in a cylinder with a movable piston. What is the maximum temperature reached during the compression |

## Find what is the displacement at this timeA cart is propelled over an XY plane. Its initial velocity has components Vx= 8 m/s and Vy= 12 m/s when it goes past (0,0). The time is t=0. what is the displacement at this time |

## Trains are traveling towards each other on parallel tracksTwo trains are traveling towards each other on parallel tracks that run diagonally Northeast to Southwest and vice versa. train A (proper length L) travels southwest to northeast and train B (proper length 2L) travels northeast to southwest. |

## Find the new capacitance with this dielectric insertedA parallel plate capacitor has a capacitance C when there is no dieletric inside of it. Suppose a wedge of material with dielectric constant K is inserted in between the plates of the capacitor, find the new capacitance with this dielectric inserte.. |

## What is the magnitude of the magnetic fieldA superhero flies 147 m from the top of a tall building at the angle of 33 degrees below the horizontal. What is the vertical component of the superhero's displacement. |

## What is the tension in cablesA 0.27 kg rock is thrown perpendicularly upward from the top of the cliff that is 32 m high. When it hits the ground at the base of cliff, the rock has a speed of 29 m/s. suppose that air resistance can be ignored, find out A) initial speed of the ro.. |

## Determine the minimum thickness of this coatingYou are applying a anti reflecting coating to your plane. You don't want to be seen by radar which uses 'light' of wavelength 2cm. determine the minimum thickness of this coating |

## Determine the power that the conveyor developsA large wooden turntable in the shape of the flat disk has a radius of 2.00 {rm m} and a total mass of 120 {rm kg}. The turntable is initially rotating at 3 {rm rad}/{rm s} about a vertical axis through its center. |

## What is the gauge pressure in the tankA closed ended manometer is used to measure the pressure in a tank of gas. what is the gauge pressure (in Pa) in the tank |

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