While conducting a lab experiment, ali calculated that 1.20 e6 joules of heat were needed to melt of 18.5 kilograms of an unknown substance at its melting point. what is the latent heat of fusion of the substance?

Arunner is training for an upcoming marathon by running around a 100-m-diameter circular track at constant speed. let a coordinate system have its origin at the center of the circle with the x-axis pointing east and the y-axis north. the runner starts at (x, y) = (50 m, 0 m) and runs 2.5 times around the track in a clockwise direction.