An object of mass 4 kg is initially at rest on a frictionless ice rink. it suddenly explodes into three pieces (i have no idea why it one chunk of mass 1 kg slides across the ice with a velocity 1.2 ms^-1i and another chunk of mass 2kg slides across the ice with a velocity 0.8 m. s^-1j. determine the velocity of the third chunk in magnitude angle form.

Athin plate moves between two parallel, horizontal, stationary flat surfaces at a constant velocity of v = 7.5 m/s. the two stationary surfaces are spaced 4 cm apart, and the medium between them is filled with oil whose viscosity is 0.9 n·s/m2. the part of the plate immersed in oil at any given time is 2 m long and 0.5 m wide. if the plate moves through the mid-plane between the surfaces, determine the force required to maintain this motion. what would your response be if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top surface (h1)? if the plate moves through the mid-plane between the surfaces, the force required to maintain the motion will be n. if the plate was 1 cm from the bottom surface (h2) and 3 cm from the top (h1) surface, the force required to maintain the motion would be n.

Explain what happens at the saturation point when adding salt to water at room temperature.

What are the starting materials for nuclear fission? two small nuclei two large nuclei a neutron and a large nucleus a neutron and a small nucleus