A sound at 160 decibels is considered loud whereas a sound at 20 decibels is considered soft.
The intensity or volume of sound is measured in unit called decibel or dB. For normal conversation, the intensity of sound is 60 decibel. Loud noise for very long time can damage the ears and very loud sound can instantly harm the ear, causing hearing problems. Sound till the range of 70 decibel is considered safe for hearing. The intensity of sound at 120 decibel causes immediate hearing issues.
Sources of loud noise include crackers, Very high volume of television, radio or earphones. The loud sound can cause damage to cells and membranes in the ears. This damage is irreversible and hence leads to permanent hearing issues.
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Answer:
D.<u>-1500Joules</u>
Explanation:
The change in kinetic energy of the object s equivalent to the workdone by the body in the west direction (negative x direction)
Workdone = Force * Distance
Given
Force = 30N
Distance moved by the object = 30m
Required
Kinetic energy
Kinetic energy = 30 * 50
Kinetic energy = 1500Joules
Since the body moves in the negative direction, hence the kinetic energy will be <u>-1500Joules</u>
Answer:
im pretty sure it is 3.0 K
Explanation:
Larger. How big depends on the size of the vector. But think about pythagoras theorem to solve for the vector.
Answer: Given the evidence in the explanation, I'm pretty sure it's C. It still exists, but in a different form.
Explanation: "Some part of the energy supplied is used to change the internal energy of the system. Some part is also released into the surroundings. Generally, frictional losses are more predominant for the machines being not 100% efficient. This friction leads to the loss of energy in the form of heat, into the surroundings."
