Physics Questions

The total amount of electrical energy used by a315-watt television during 30.0 minutes ofoperation is(1) 5.67 × 10^5 J (3) 1.05 × 10^1 J(2) 9.45 × 10^3 J (4) 1.75 × 10^1 J
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If a substance is heated and then cooled off but remains as the original substance a _____ change has occurred.A) physical B) chemical C) structural D) physical and chemical
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When a covalent or an ionic bond is formed a chemical change has occurred. Which of these is not associated with a chemical change?A) The atoms of the substance produced have been rearranged. B) The substances produced are identical to the substances that reacted except that they're isomers.C) The total mass of the reacting substances is the same as the total mass of the substance produced by the reaction. D) The chemical properties of the substances produced by the reaction are different from those of the reacting substances.
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A periodic wave is produced by a vibratingtuning fork. The amplitude of the wave would begreater if the tuning fork were(1) struck more softly(2) struck harder(3) replaced by a lower frequency tuning fork(4) replaced by a higher frequency tuning fork
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An electric heater operating at 120. volts draws8.00 amperes of current through its 15.0 ohms ofresistance. The total amount of heat energyproduced by the heater in 60.0 seconds is(1) 7.20 × 10^3 J (3) 8.64 × 10^4 J(2) 5.76 × 10^4 J (4) 6.91 × 10^6 J
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Which of the following is an example of an object that could have a net force greater than zero acting on it?A. a glass resting on a tableB. a ball rolling down a rampC. a ladder leaning against a wallD. a toy car moving east at a constant velocity
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Which of the following statements describes an electric generator?A. A magnet is rotated through a coil of wire to produce an electric current.B. Electric potential in a rotating coil of wire creates a permanent magnet.C. An electrical current causes a coil of wire to rotate in a magnetic field.D. Forces from a permanent magnet allow a coil of wire to rotate.
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What does the term equilibrium refer to?
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A charged atom is called a(n) _____.
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Which of the following objects is NOT normally used in current space exploration?a. space shuttles c. single use rockets b. space stations d. space probes
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Identify each of the cell structures in the figure
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A car traveling in a straight line has a velocity of 3.79 m/s at some instant. After 5.4 s, its velocity is 11.9 m/s. What is its average acceleration in this time interval? Answer in units of m/s 2
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a penny dropped into a wishing well reaches the bottom in 1.50 seconds. what was the velocity at impact
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A sample has a mass of 15 g and a volume of 3mL
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Is a aluminum pie plate an element
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Tobacco use can negatively impact a person's health, family, and finances. True or false
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the wires inside a cable each have there own plastic insulation .why does the insulasion have diffrent colours
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Britain and France signed an entente and became thea.Central Forces.c.Central Powers.b.Allied Forces.d.Axis Powers.
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