The three types of heat transfer are conduction convection and radiation. <u>Explanation:</u>
- Heat transfer happens only when there is said to be a temperature difference. (i.e) heat transfer occurs with a higher temperature region to a lower temperature region.
- Heat is transferred usually via some medium in the case of convection and conduction whereas in the radiation no medium is required ( i.e it take place in a vacuum ).
- Conduction is a type of heat transfer that is mainly a character for the conducting and semiconducting solid material.
- Convection is the heat transfer method that usually takes place in the liquids and gases.
- Radiation is the heat transfer process in which heat is transferred via infrared or electromagnetic waves.
(a) The work done by the applied force is 26.65 J.
(b) The work done by the normal force exerted by the table is 0.
(c) The work done by the force of gravity is 0.
(d) The work done by the net force on the block is 26.65 J.
<h3>
Work done by the applied force</h3>
W = Fdcosθ
W = 14 x 2.1 x cos25
W = 26.65 J
<h3>
Work done by the normal force</h3>
W = Fₙd
W = mg cosθ x d
W = (2.5 x 9.8) x cos(90) x 2.1
W = 0 J
<h3>Work done force of gravity</h3>
The work done by force of gravity is also zero, since the weight is at 90⁰ to the displacement.
<h3> Work done by the net force on the block</h3>
∑W = 0 + 26.65 J = 26.65 J
Thus, the work done by the applied force is 26.65 J.
The work done by the normal force exerted by the table is 0.
The work done by the force of gravity is 0.
The work done by the net force on the block is 26.65 J.
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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.
An object like glass that allows light to pass through is said to refract light.
<h2>
PROPERTIES OF WAVES</h2>
Four general properties of waves are;
An object that allows light to pass through is said to refract light because of the followings
- If it absorbs, it will not transmit the light.
- If it reflect, some portion of the light will not be transmitted.
- Light refract when moving from one medium to another.
Therefore, An object like glass that allows light to pass through is said to refract light.
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