To drive a car at a constant velocity, you have to hit the gas. That's because
A. the car needs to create a force to
offset the other forces acting on it.
B. all objects need a net forward force to keep moving.
C. the car must accelerate to keep a constant velocity.
D. otherwise the car would move in a circle.

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

Transfer chemicals from one location to another to weather objects. a-water b-physical weathering c-chemical weathering

Consider a one meter long horizontal pipe with a constant 100 cm^2 cross sectional area. water flows rightward into the pipe at x = 0 with flow velocity 02m/sec at every point within the pipe intake area. at x=1, the rightward flow rate is 0.192 m/sec. assume the water is a conserved quantity in the pipe, so there must be a leak (a sink) somewhere in the pipe. 1. compute net volumetric flow of the source if the system to be in equilibrium. 2. now assume the pipe in the problem has no leaks. compute the net volumetric rate of change for the system.