The dimension of a rectangular aquarium are 0.5 meter by 1 meter. The mass of aquarium is 250 kg larger when it is full of water than when it is empty. What is the density of water?

The passing of heat through a material while the material itself stays in place. a. radiation b. conduction c. convection

Awave is produced in a rope. the wave has a speed of 33 m/s and a frequency of 22 hz. what wavelength is produced?

Electric field of the earth. the earth has a net electric charge that causes a field at points near its surface equal to 150 n> c and directed in toward the center of the earth. (a) what magnitude and sign of charge would a 60-kg human have to acquire to overcome his or her weight by the force exerted by the earth’s electric field? (b) what would be the force of repulsion between two people each with the charge calculated in part (a) and separated by a distance of 100 m? is use of the earth’s electric field a feasible means of flight? why or why not?