Is it possible for the efficiency of some device

Reference no: EM13655228

Is it possible for the efficiency of some device or machine to be greater than 1? either give and example where efficiency is greater then 1 or explain why it's not possible.

Reference no: EM13655228

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Velocity relative to the sidewalk : A 40.0-kg boy, riding a 2.50-kg skateboard at a velocity of +5.30m/s across a level sidewalk, jumps forward to leap over a wall. Just after leaving contact with the board, the boy's velocityrelative to the sidewalk is 6.00 m/s, 9.50o abovethe hori..

Two long straight conducting wires are parallel with z-axis : Two long straight conducting wires are parallel with thez-axis. The first wire, A, passes through the point y = + 3.0 m onthe y axis and carries a current of 12 A in the + z direction. The second wire, B, passes through the point y = - 2.0 m on th..

What is the total magnification due to both lenses : An object is placed 14 cm to the left of a two lens combination.The left hand lens has a focal length of +12 cm. The right handlens has a focal length of + 3.0cm. The distance between the twolenses is 86 cm.

What is the ratio of the balls final speeds : A ball of mass m = 2.1 kg moving with a speed of v0 = 15.2 m/sstrikes an identical ball which was initially at rest. After thecollision, the incoming ball (ball 1) goes off at q1 = 28°relative to its original direction and the struck ball (ball 2)..

Is it possible for the efficiency of some device : Is it possible for the efficiency of some device or machine to be greater than 1? either give and example where efficiency is greater then 1 or explain why it's not possible.

What is her new rotation frequency in revolutions persecond : A 45 kg figure skater is spinning on the toes of her skates at1.0 rev/s. Her arms are outstretched as far as they willgo. In this orientation, the skater can be modeled as acylindrical torso (40 kg, 20 cm average diameter, 160 cm tall) plustwo rod..

Potential energy of water were converted to electric energy : Water flows over Victoria Falls, which is 128 m high, at an average rate of 1.20 times 106 kg/s. If two thirds the potential energy of this water were converted to electric energy, how much power would be produced by these falls?

Sharpimage always falls on the sensor : To focus a camera on objects at different distances, the converginglens is moved toward or away from the image sensor, so a sharpimage always falls on the sensor.

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