You're sitting in the back of a taxi and place your bag on the seat next to you. The taxi enters a traffic circle and travels the circle at a constant speed. During this motion, you notice that your bag does not move relative to the seat. As the taxi travels the traffic circle, which of the following statements are true in an inertial reference frame?

I. The acceleration of the bag is nonzero and constant.
II. The net force on the bag is nonzero and constant.
III. The frictional force acting on the bag is nonzero and constant.

(a) II only
(b) II and III
(c) I, II, and III
(d) III only
(e) None of the statements (I, II, or III) are true.

What is the final velocity of the initial velocity of 25 and -50?

World class speed skaters can skate a 3,000-m course in about 4 minutes.what is their average speed for this course? a. 12.5 m/sb. 1.33 m/sc. 1.25 m/sd. 13.3 m/s

1. how much energy is needed to raise the temperature of 40.0 g of argon from 25c to 40c? the specific heat capacity of argon is 0.520 j/(g·k) 2a. 23.0 ml of 0.100 m hcl (standard) are added from a buret to neutralize 50.0 ml of an unknown basic solution. 2b. if the oh- produced in the previous reaction came from ca(oh)2, then what is the molarity of the ca(oh)2? 3.calculate the new freezing-point of a solution when 60.5 grams of cacl2 solute is dissolved in 0.612 kg of water. 4. what is the maximum number of moles of alcl3 that can be produced from 5.0 mol al and 6.0 mol cl2? 5. a sample of oxygen gas has a volume of 150 ml when its pressure is 0.923 atm. if the pressure is increased to 0.987 atm and the temperature remains constant, what will the new volume be? 6. nitrogen gas in a closed container at a temperature of 100.0 oc and 3.0 atm is heated to 300 oc. what is the pressure of the gas at the higher temperature?