PhysicsLAB NY Regents
June 2019, Part 1

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1. Which pair of quantities represent scalar quantities?
 
2. A sailboat on a lake sails 40. meters north and then sails 40. meters due east. Compared to its starting position, the new position of the sailboat is
 
3.  A ball is thrown straight upward from the surface of Earth. Which statement best describes the ball’s velocity and acceleration at the top of its flight?
 
4. As a student runs a plastic comb through her hair, the comb acquires a negative electric charge. This charge results from the transfer of
 
5. How would the mass and weight of an object on the Moon compare to the mass and weight of the same object on Earth?
 
6. An object is moving with constant speed in a circular path. The object’s centripetal acceleration remains constant in
 
7.As shown in the diagram below, a rope attached to a 500.-kilogram crate is used to exert a force of 45 newtons at an angle of 65 degrees above the horizontal.



The horizontal component of the force acting on the crate is
 
8. A spring with a spring constant of 68 newtons per meter hangs from a ceiling. When a 12-newton downward force is applied to the free end of the spring, the spring stretches a total distance of
 
9. As a student walks downhill at constant speed, his gravitational potential energy
 
10. When 150 joules of work is done on a system by an external force of 15 newtons in 20. seconds, the total energy of that system increases by
 
11. A person on a ledge throws a ball vertically downward, striking the ground below the ledge with 200 joules of kinetic energy. The person then throws an identical ball vertically upward at the same initial speed from the same  point.  What is the kinetic energy of the second ball when it hits the ground? [Neglect friction.]
 
12. Two construction cranes are used to lift identical 1200-kilogram loads of bricks the same vertical distance. The first crane lifts the bricks in 20. seconds and the second crane lifts the bricks in 40. seconds. Compared to the power developed by the first crane, the power developed by the second crane is
 
13. An ionized calcium atom has a charge of +2 elementary charges. If this ion is accelerated through a potential difference of 2.0 x 103 volts, the ion’s change in kinetic energy will be
 
14. A total charge of 100. coulombs flows past a fixed point in a circuit every 500. seconds. What is the current at this point in the circuit?
 
15. An aluminum wire of length 1.0 meter has a resistance of 9.0 x 10–3 ohm. If the wire were cut into two equal lengths, each length would have a resistance of
 
16. In an operating electrical circuit, the source of potential difference could be
 
17. A lightbulb with a resistance of 2.9 ohms is operated using a 1.5-volt battery. At what rate is electrical energy transformed in the lightbulb?
 
18. A 40.0-kilogram child exerts a 100.-newton force on a 50.0-kilogram object. The magnitude of the force that the object exerts on the child is
 
19. Two identical stationary bar magnets are arranged as shown in the diagram below.
 


What is the direction of the magnetic field at point P?
 
20. A student claps his hands once to produce a sudden loud sound that travels through the air. This sound is classified as a
 
21. A student generates water waves in a pool of water. In order to increase the energy carried by the waves, the student should generate waves with a
 
22. A wave generator produces straight, parallel wave fronts in a shallow tank of uniform-depth water. As the frequency of vibration of the generator increases, which characteristic of the wave will always decrease?
 
23. A space probe produces a radio signal pulse. If the pulse reaches Earth 12.3 seconds after it is emitted by the probe, what is the distance from the probe to Earth?
 
24. The diagram below represents a light ray reflecting from a plane mirror.
 


The angle of reflection for this light ray is
 
25. A light wave travels from one medium into a second medium with a greater absolute index of refraction. Which characteristic of the wave can
 



 
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