HELP ME!!! What is the gravitational potential energy of a 200 Kg wrecking ball that is held up 25 m off the ground? A. 62,500 J

B. 49,000 J

C. 5000 J

D. 6377.6 J

Consider the directing effects of the substituents on salicylamide and predict the possible structures of the iodination products. which do you think will be the major product?

Which of the following is true about the speed of light? it depends on the wavelength.

1) a light bulb takes in 30 of energy per second. it transfers 3j as use energy. calculate the efficiency. second. it transfers 3j as useful light energy and 27j as heat energy. calculate the efficiency