Answer:
The ozone layer is present in the stratosphere.
Answer:
Sound waves does not include in EM Spectrum
So, option C is your answer!
Explanation:
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Answer:
a) dynamic equilibrium; b) No equilibrium; c) Static equilibrium; d) Dynamic equilibrium; e) Not equilibrium; f) Dynamic equilibrium.
Explanation:
a) In this case, the girder is in dynamic equilibrium, although there is movement it is realized at constant speed therefore there is no acceleration and the sum of forces is equal to zero.
b) There is no equilibrium since the velocity is decreasing it slows the girder, therefore the sum of forces will be equal to the product of mass by acceleration according to newton's second law.
c) In this case, the arms of the person are exercising each 100 lb, in order to keep the barbell stable, this allows the static equilibrium.
d) There is movement but however the jet will move at constant speed without any kind of acceleration, therefore it has a condition of dynamic equilibrium.
e) There is no balance as the rock falls and the acceleration due to gravity causes its speed to increase as it goes down.
f) In this case there is dynamic equilibrium as there was a deceleration movement however this force value given by the deceleration multiplied by the mass is not large enough to be able to move the box, due to the weight of the box plus the friction force between the box and the surface.
Answer:
False
Explanation:
Because if you were running on a tredmill they have clips that target your heart rate so it does not go to far up or to low.
Answer:
No force is generated
Explanation:
Solution:-
- The reason that current carrying parallel wires exert forces between them is that the magnetic field of the one is perpendicular to the velocity of the electrons in the other one (current = moving electrons).
- The magnetic force Fm is given by the cross product of velocity vector (v) and strength of magnetic field (B):
Fm = q* ( v x B ).
- In perpendicular (current carrying) wires, the magnetic field of one wire is in parallel with the velocity of the electrons in the other one, and, thus, no force is generated.
Fm = q * // ( v x B )
= q * ( 0 ) = 0
- The cross product of parallel vectors is zero.