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When the height of a box shaped object is multiplied by its width and lenght its volume is found?

Multiplying the height, width, and length of a box-shaped object gives you the volume. This formula works because volume is a measure of the 3-dimensional space inside the object, so by multiplying these three measurements you can calculate the total volume the object occupies.


How do you increase the force exerted on a current carrying coil placed in a magnetic field?

Since the magnitude of force on a wire is I*L*B*sinθ, then you can increase the current, or increase the magnetic field, or adjust the angle so that it is per pendicular to the coil wires. You can increase the lenght (increase the number of turns).


What is the wave height of a wave whose wave lenght is 8meters and the distance from trough to crest is 5 meters?

Clarify the question first. Draw a diagram... What is meant by "distance from crest to trough" ? If you see that it should say "diagonal distance" the diagram then makes sense and its solution becomes obvious. - RogerC


What type of wave lenght would be longer than infrared rays?

Microwaves would have longer wavelengths than infrared rays.


A concave mirror and a convex lens are held in waterwhat changes if any do you expect in their focal length?

Excellent question. The answer is actually yes! According to the lens makers formula, it will change based on the refractive index of the material of the concave mirror wrt the medium. Google Lens makers formula for better understanding! NO! the focal length of the mirror will not change if it would be a lens then the focal length would change. The lens maker's formula is for Lenses only!