A magnifying glass uses a convex lens of focal length 5.25 cm. When it is held 5.00 cm in front of an object, what magnification does it create? pls help

If the force applied to an object remains constant, is more power needed for the object to move faster ? explain

Avoltaic cell converts chemical energy to

Currents in dc transmission lines can be 100 a or higher. some people are concerned that the electromagnetic fields from such lines near their homes could pose health dangers. for a line that has current 150 a and a height of 8.0 m above the ground, what magnetic field does the line produce at ground level? express your answer in teslas and as a percentage of the earth’s magnetic field, which is 0.50 g. is this value cause for worry?