How was Einstein's theory that energy and mass are interchangeable eventually proven to be correct?

An iron block of density rhoFe and of volume l 3 is immersed in a fluid of density rhofluid. The block hangs from a scale which reads W as the weight. The top of the block is a height h below the surface of the fluid.

Which of the following is not a benefit of increased energy efficiency?

Magnetic fields are caused by? A. stationary charges B. copper wire C. only protons D. moving charges

Genes can be turned on or turned off not all genes are active at one time true or false

Imagine that you work for a conservation organization. Your job is to make recommendations to restore an area of a prairie that has been damaged by fire. Provide three ways in which the damaged area could be restored by human activities.

Two football players collide on the field. Before the collision, their total momentum was 450 kgm/s to the north. What is their total momentum after the collision? A. More than 450 kgm/s north B. 450 kgm/s north C. Less than 450 kgm/s north D.

Jane and John Doppler effect

If you combine 430.0 ml of water at 25.00 °c and 140.0 ml of water at 95.00 °c, what is the final temperature of the mixture? use 1.00 g/ml as the density of water. s

While working out, a man performed 200 j of work in 3 seconds. What was his power?

A funnel-shaped low pressure closure