It takes 487.5J to heat 25 grams of copper from25 °C to 75 °C. What is the specific heat in Joules/•g°C?
A. 0.39 J/g°C
B. 0.78 J/g°C
C. 609000 J/g°C
D. 589 J/g°C

The summit of chimborazo, in ecuador, which is at a distance of about 6,384 km from the earth’s center. the bottom of the mariana trench, in the western pacific ocean, which is nearly 6,370 km from the center of the earth. on the surface of earth on the equator line.

Using a wheel and axle, a farmer is trying to lift a bucket of water from the bottom of a well. the larger wheel has a radius of 40 cm compared to the axle that has a radius of 10 cm. if a bucket of water is 50 n, then how much effort is required to raise it? 12.5 n 200 n 2 n 500 n

If an electric circuit is not grounded it is best to reach out and touch it to provide the ground a.true or b.false