Select the choice below that would create the strongest force of gravity between the objects * 3 points
A. Object 1: Mass of 10 kg; Object 2: Mass of 10 kg; Distance between objects: 1,000 m
B. Object 1: Mass of 5 kg; Object 2: Mass of 5 kg; Distance between objects: 1,000 m
C. Object 1: Mass of 250 kg; Object 2: Mass of 250 kg; Distance between objects: 1,000 m
D. Object 1: Mass of 125 kg; Object 2: Mass of 125 kg; Distance between objects 1,000 m

List one type of erosion and describe how it happens?

Air is held within a frictionless piston-cylinder container, which is oriented vertically. the mass of the piston is 0.45 kg and the cross-sectional area is 0.0030 m2. initially (state 1) the pressure of the gas is sufficient to support the weight of the piston as well as the force exerted by the atmospheric pressure ( 101.32 kpa). the volume occupied by the air within the cylinder in state 1 is 1.00 liter. one end of a spring (with spring constant k = 1000 n/m) is attached to the top of the piston, while the other end of the spring is attached to a stage that can move vertically. initially the spring is undeflected and therefore exerts no force. then the stage is then moved quasistatically downward a distance of 10.0 cm, at which point the system reaches state 2. the piston-cylinder is not insulated; rather it remains in diathermal contact with the surroundings, which are at a constant temperature of 300 k. what is the change of pressure within the container?

Critical mass is the of material required to produce a chain reaction. a.) minimum amount b.) atomic mass c.) precise amount d.) maximum amount