A car rounds a flat curve and experiences a centripetal force directed toward the center of the curve and perpendicular to the direction of its motion. If the driver of the car doesn't hit the brake OR the gas, how will the curve affect the motion of the car?

A) The car's speed and direction will remain constant.
B) The car will speed up and its direction will change.
C) The car will slow down and its direction will remain constant.
D) The car's speed will remain constant and its direction will change.

A dynamic cart moving at 4 m/s is run into the back of and sticks to an identical cart. At what speed should the two carts move off together?
A) 2 m/s
B) 4 m/s
C) 8 m/s
D) It cannot be determined with knowing the actual mass of the carts.

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?

When is a current produced? when the terminals of an electrochemical cell are connected by a wire if the electric circuit is opened in an electrochemical cell if the electrolyte is removed from an electrochemical cell when the electrodes are reversed in an electrochemical cell

Calculate the first and second velocities of the car with four washers attached to the pulley, using the formulas v1 = 0.25 m / t1 , and v2 = 0.25 m / (t2 – t1) where t1 and t2 are the average times the car took to reach the 0.25 and the 0.50 meter marks. record these velocities, to two decimal places, in table e.