Physics multiple choice questions

1. Which of the following energy transformations best describes the operation of a solar powered battery charger?
(a) electrical energy --> thermal energy --> kinetic energy
(b) nuclear energy --> potential energy --> chemical energy
(c) thermal energy --> elastic potential energy --> electrical energy
(d) radiant energy --> electrical energy --> chemical potential energy
(e) radiant energy --> thermal energy --> electrical energy

2. A jet engine applies a thrust force of 21.0 N vertically to a 0.500 kg rocket. The force of air friction is negligible for the first 50.0 cm of flight. Find the kinetic energy gained by the rocket in the first 50.0 cm of takeoff.
(a) 4.0 J
(b) 8.05 J
(c) 10.5 J
(d) 21 J
(e) 32 J

3. A 300 N force is applied horizontally to a 50kg crate, originally at rest, pushing it 2 m. The force of friction between the crate and the floor is 200 N. The final kinetic energy of the crate is:
(a)0 J
(b)200 J
(c)400 J
(d)600 J
(e)300000 J

4. The rated power output of an engine is 10 hp, 7460 W. How much energy would it produce in 10 minutes?
(a) 0 J
(b)100 J
(c) 74600 J
(d) 4.5 MJ
(e) 746 MJ

5. An electrical hair dryer consumes 90 kJ in one minute. What is the power used by this hair dryer?
(a) 90 W
(b) 100W
(c) 1500 W
(d) 5.4 kW
(e) 1 hp

  1. 👍 0
  2. 👎 1
  3. 👁 1,024
  1. Ah, first you try and it is too late because I have to go to sailing practice. Maybe Steve will help.

    1. 👍 0
    2. 👎 0
  2. D
    A
    B
    C
    A

    1. 👍 3
    2. 👎 4
  3. abcd

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. Science - Please Help!!!

    when you turn on a battery powered flashlight, you transform A - Heat energy into light and chemical energy. B - Chemical energy into electrical energy and light. C - Heat energy into chemical energy and light D - Electrical

  2. Algebra

    Which best describes your ability to work with transformations in the coordinate plane? A. I can graph translations, reflections, and rotations in the coordinate plane. I can use math vocabulary to describe these transformations.

  3. Science 6

    When you turn on a battery powered flashlight, you transform... A:heat energy into light and chemical energy. B:chemical energy into electrical energy and light. C:heat energy into chemical energy and light. D:eletrical energy and

  4. Science 8

    When you turn on a battery-powered flashlight, you transform A.) Heat energy into light and chemical energy. B.) Chemical energy into electrical energy and light. C.) Heat energy into chemical energy and light. D.)Electrical

  1. Science Help

    Which of the following statements describes the conservation od a natural resource? A. A factory burns coal to run its machines. B. A solar energy company harvests energy from sunlight. C. Lights in a house are turned off when not

  2. physics

    4. A bulb is joined to a battery of e.m.f 6V. A steady current of 0.5 A flows through circuit. Calculate the total energy provided by the battery in 5 minutes.

  3. Physics -- check answers please

    1. Which of the following energy transformations best describes the operation of a solar powered battery charger? (a) electrical energy --> thermal energy --> kinetic energy (b) nuclear energy --> potential energy --> chemical

  4. Solar Energy

    a) Consider a lead acid battery with 100Ah capacity and a rated voltage of 24V. What is the total capacity of energy in Watt-hours that can be stored in the battery? b) Assume that the battery is completely empty. The battery is

  1. physics help

    At a certain location, the solar power per unit area reaching the Earth's surface is 180 W/m2 averaged over a 24-hour day. Suppose you live in a solar powered house whose average power requirement is 3.2 kW. At what rate must

  2. Science

    Consider a lead-acid battery with 500 Ah capacity and a rated voltage of 12 V. a)What is the total capacity of energy in watt-hours that can be stored in the battery? b)Assume that the battery is completely empty. The battery is

  3. Science

    Which of the following statements describes the conservation of a natural resource? A. A timber company only cuts some trees down and replaces them with new trees. B. A solar energy company harvests energy from sunlight. C. A

  4. Social Impact of Technology

    Which of these kinds of energy is a fundamental requisite for life on Earth? A. Electrical energy B. Solar energy C. Chemical energy D. Potential energy An -- C

You can view more similar questions or ask a new question.