When the shuttlecock is well below net height, players have no choice but to hit upwards.

When the shuttlecock is near to net height, players can hit drives, which travel flat and rapidly over the net into the opponents ' rear midcourt and rearcourt.

When the angular velocity of this co-rotating frame is not constant, that is, for non-circular orbits, other fictitious forces — the Coriolis force and the Euler force — will arise, but can be ignored since they will cancel each other, yielding a net zero acceleration transverse to the moving radial vector, as required by the starting assumption that the vector co-rotates with the planet.

When this field is instead studied using the QED vacuum of quantum electrodynamics, it is seen that the plates do affect the virtual photons which constitute the field, and generate a net force — either an attraction or a repulsion depending on the specific arrangement of the two plates.

When investors and managers perform DCF analysis, the important thing is that the net present value of the decision after discounting all future cash flows at least be positive ( more than zero ).

When the net electric charge of an object is non-zero and motionless, the phenomenon is known as static electricity.

When the group of covalently bound atoms bears a net charge, the group is referred to more properly as a polyatomic ion or a complex ion.

When light makes multiple reflections between two or more parallel surfaces, the multiple beams of light generally interfere with one another, resulting in net transmission and reflection amplitudes that depend on the light's wavelength.

When diamagnetic material is placed in a magnetic field, a magnetic dipole tends to align itself in opposed polarity to that field, thereby lowering the net field strength.

When the fish are old enough they are freed from the net to mature in the open sea.

When a magnetic field is applied, the dipoles will tend to align with the applied field, resulting in a net magnetic moment in the direction of the applied field.

When an external magnetic field is applied to an assembly of superparamagnetic nanoparticles, their magnetic moments tend to align along the applied field, leading to a net magnetization.

When the net force on the system is zero, the torque measured from any point in space is the same.

When using contracts, a supplier should not try to verify that the contract conditions are satisfied ; the general idea is that code should " fail hard ", with contract verification being the safety net.

When some other piece is chosen it is known as " underpromotion ", and the piece selected is most often a knight, used to execute a checkmate or a fork giving the player a net increase in material compared to promoting to a queen.

When net income is composed of large non-cash items it is considered low quality.

When the disk undergoes a full clockwise revolution, the bicycle wheel will not return to its original position, but will have undergone a net rotation of.

When the membrane is in thermodynamic equilibrium ( i. e., no net flux of ions ), the membrane potential must be equal to the Nernst potential.

When rain came, the swamp overflowed into the ditch, washing Tuna-roa into the meshes of the net.

When a mail server receives a connection from a client, and wishes to check that client against a DNSBL ( let's say, dnsbl. example. net ), it does more or less the following:

When net chloride flows out of the cell, GABA is excitatory or depolarizing ; when the net chloride flows into the cell, GABA is inhibitory or hyperpolarizing.

When the temperatures are the same, no net evaporation of water in air occurs ; thus, there is no cooling effect.

When it was all arranged to fit, and not to interrupt the lengthwise flow of movement in the frieze, the cartoons were tried in place.

When a positive voltage is applied to anode of the diode from the circuit, more holes are able to be transferred to the depleted region, and this causes the diode to become conductive, allowing current to flow through the circuit.

When used by academics, an arbitrage is a transaction that involves no negative cash flow at any probabilistic or temporal state and a positive cash flow in at least one state ; in simple terms, it is the possibility of a risk-free profit at zero cost.

When analyzing the deformation or motion of solids, or the flow of fluids, it is necessary to describe the sequence or evolution of configurations throughout time.

When oscillating electric currents flow at the correct voltages within radio antennas, radio waves are generated.

When awareness is focused on memories of past experiences and mental verbalisations, the energy flow to the head chakra increases and the energy flow to the heart chakra lessens.

When P and N-doped layers are placed in contact, diffusion ensures that electrons flow from high to low density areas: That is, from the N to the P side.

There are several choices for the set T. When T is taken to be the reals, the dynamical system is called a flow ; and if T is restricted to the non-negative reals, then the dynamical system is a semi-flow.

When b is zero and A ≠ 0 the origin is an equilibrium ( or singular ) point of the flow, that is, if x < sub > 0 </ sub > = 0, then the orbit remains there.

When the tide came in water was allowed to flow in behind a barrier.

When the tide turned the water was trapped and it was only allowed to flow out under a mill turning its ' wheel '.

When the flow is everywhere irrotational and inviscid, Bernoulli's equation can be used throughout the flow field.

When electrons flow through a conductor, a magnetic field is produced.

When the piston moves further down and the cylinder doesn't have anymore gases, fuel mixture starts to flow to the combustion chamber and the second process of fuel compression starts.

When there is no flow, there is no lift and the aerodynamic forces acting on the airfoil are zero.

When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity of the fluid: laminar flow or turbulent flow.

When the Reynolds number is much less than 1, Creeping motion or Stokes flow occurs.

When blood flow is suppressed, glutamate is released from presynaptic neurons causing NMDA and AMPA receptor activation moreso than would normally be the case outside of stress conditions, leading to elevated Ca < sup > 2 +</ sup > and Na < sup >+</ sup > entering the post synaptic neuron and cell damage.

When two geometrically similar flow patterns, in perhaps different fluids with possibly different flow rates, have the same values for the relevant dimensionless numbers, they are said to be dynamically similar.