If enough electric power is available, cooling can be provided by conventional air conditioning using a heat pump.

If a gas powered pump can drain a pool in 4 hours and a battery powered pump can drain the same pool in 6 hours, then it will take both pumps

If the applied pump power is too small, the gain will never be sufficient to overcome the resonator losses, and laser light will not be produced.

If the pump beams E < sub > 1 </ sub > and E < sub > 2 </ sub > are plane ( counterpropagating ) waves, then:

If the pump waves are of frequency ω < sub > 1 </ sub >

If rotary pumps are operated at high speeds, the fluids will cause erosion, eventually developing enlarged clearances through which liquid can pass, reducing the efficiency of the pump.

If a similar set of disks and a housing with an involute shape ( versus circular for the turbine ) are used, the device can be used as a pump.

If a machine to do a necessary job is too expensive to import ( say a wheat harvester, a water pump, or even a washing machine ), a human must do it instead.

If not immediately treated by defibrillation, fibrillation is usually lethal because all of the heart muscle cells move independently instead of in the coordinated pulses needed to pump blood and maintain circulation.

If the pump is used outside its specification, the compression of the gas generates so much heat that the lobes expand to the point that they jam, damaging the pump.

If the high operating pressure is not required, a tubing pump is a better option than a hose pump if the pumped medium is not abrasive.

If an infant does not latch properly for direct breastfeeding and the mother still desires the benefits of breast milk, she may choose to pump exclusively.

If the mother needs to take medication that affects the breast milk and may be harmful to the infant, the mother may " pump and dump " the breast milk to keep up her milk supply during the time period that she is on the medication and may resume nursing after the course of medication is completed.

If milk leaks into the pump ’ s tubing, the tubes should be washed, sterilized and air-dried prior to using the pump again.

If the spinning body is regarded as an inefficient air pump, air will build up on the forward-moving side causing higher pressure there than on the opposite side.

If the temperature gradient operator is less than one, the mean temperature gradient is smaller than the critical gradient and the stack operates as a heat pump.

If accrued supervision is required for the feeding, the tube is often connected to an electronic pump which can control and measure the patient's intake and signal any interruption in the feeding.

If the pressure gradient is large enough, the dry offshore wind can become quite strong with gusts reaching speeds of or higher, particularly along and in the lee of the ridges of the Coast Range where the higher wind speed aloft acts like a pump, drawing warm, dry surface air from the windward eastern side up and over the ridgelines.

If the aircraft is equipped with a fuel pump:

If the turbine's operation was reversed, the disks acted as a pump.

If the slowing down of certain seismic waves caused by the damp spot helped uncover the underground ocean, the unusual temperature variation with depth measured in 241 inactive oil wells helped locate the subterranean river.

If waves are emitted from an extended source, this can lead to incoherence in the transversal direction.

If the width of the slits is small enough ( less than the wavelength of the laser light ), the slits diffract the light into cylindrical waves.

If the waves are propagating through an anisotropic ( i. e., not rotationally symmetric ) medium, for example a crystal, then the phase velocity vector and group velocity vector may point in different directions.

If a spatial extra dimension is of radius R, the invariant mass of such standing waves would be M < sub > n </ sub > = nh / Rc with n an integer, h being Planck's constant and c the speed of light.

If two waves of the same wavelength and frequency are in phase, both the wave crests and wave troughs align.

If two interacting waves meet at a point where they are in antiphase, then destructive interference will occur.

If the object is moving either toward or away from the transmitter, there is a slight equivalent change in the frequency of the radio waves, caused by the Doppler effect.

If electromagnetic waves traveling through one material meet another, having a very different dielectric constant or diamagnetic constant from the first,

If the diaphragm is placed on the patient, body sounds vibrate the diaphragm, creating acoustic pressure waves which travel up the tubing to the listener's ears.

If the bell is placed on the patient, the vibrations of the skin directly produce acoustic pressure waves traveling up to the listener's ears.

If a sound absorbing sheet is slid in between the prongs of a vibrating fork, reducing the waves reaching the ear from one prong, the volume heard will actually increase, due to a reduction of this cancellation.

If the waves have the correct frequency ( or wavelength ) and polarization, their energy can be transferred to the charged particles in the plasma, which in turn collide with other plasma particles, thus increasing the temperature of the bulk plasma.

If u is a superposition of such waves with weighting function φ, then

If scatterers are arranged symmetrically with a separation d, these spherical waves will be in sync ( add constructively ) only in directions where their path-length difference 2d sin θ equals an integer multiple of the wavelength λ.

If the distance between musicians is large enough, listeners may perceive waves to be out of phase.

If unobstructed, radio waves will travel in a straight line from the transmitter to the receiver.

If this depends on the polarization states of the waves, then their polarization may also be altered.

If the path length in the birefringent medium is sufficient, plane waves will exit the material with a significantly different propagation direction, due to refraction.

If the radio wave frequency is decreased, a point is reached where all waves ( even vertically incident waves ) are reflected back to the Earth.

If mounted on a finite baffle, and these out of phase waves allowed to interact, dipole peaks and nulls in the frequency response result.