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A heat pump has a coefficient of performance of 3.75 and operates with a power consumption of 6.89 103 W. How much energy does it extract from the outside air?
An airplane pilot wishes to fly due west. A wind of 70.0 km/h is blowing toward the south. What is the speed of the plane over the ground
The wavelength of visible light ranges from 400 to 700. Find the ranges of this light's angular frequency and Find the ranges of this light's wave number
You heat a 585 cm3 sample of a substance from 129°C to 283°C, Calculate the coefficient of volume expansion of this substance
A 1.10-mol sample of hydrogen gas is heated at constant pressure from 304 K to 422 K. Calculate the increase in its internal energy
If the flare is fired at the same angle over the flat Sea of Tranquility on the moon, where g = 1.6 m/s2, describe what is its horizontal range?
a 50-N crate is pulled up a 5-m inclined plane by a worker at a constant velocity. what is the force applied by the worker
Albert stands on a frictionless turntable, holding a bike wheel. Both Albert and the wheel are initially stationary. find the final angular momentum had by the rest of the system
A pendulum is made by tying a 550g ball to a 52.0cm -longstring. To what angle does the pendulum swing on the other side
If two adjacent natural frequencies of an organ pipe are determined to be 550Hz and 650Hz, calculate the fundamental frequency and length of the pipe. Assume v(air)=340 m/s
An object is made of glass and has the shape of a cube 0.12 m on a side, according to an observer at rest relative to it. However, an observer moving at high speed parallel to one of the object's edges and knowing that the object's mass is 2.8 kg ..
A step-down transformer is used for recharging the batteries of portable electronic devices. Find the current on the secondary side
A long cylindrical conductor is placed in an initially (i.e., before the cylinder is present)uniform electric field which is perpendicular to the axis of the cylinder. Find the electrical potential outside of the cylinder
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