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Questions in physics

[Answered] What does it mean when work is positive? A. Velocity is greater than kinetic energy. B. Kinetic energy is greater than velocity. C. The environment did work on an object. D. An object did work on the environment.

[Answered] What's the correct order of the thunderstorm life cycle, from its beginning to its end? A. Development, dissipation, maturity B. Development, maturity, dissipation C. Maturity, development, dissipation D. Maturity, dissipation, development

[Answered] Write T for true statement and F for false statement. 1. Light cannot travel through a vacuum. 2. Shadow is formed when the light is blocked by an object. 3. Plants need light to make their food. 4. The moon is a luminous object. 5. You can see through an opaque object. 6. We can prove that light travels in straight line using card board with holes. 7. You can see the candle flame through a bent pipe. 8. Noise pollution can affect sleep and mental health. 9. Schools and hospitals should be in NO-Horn zone. 10. Soft sounds are caused by large vibrations. 11. Loudness depends on the strength of vibrations. 12. Loud sounds have high intensity. 13. Noise from machine cannot be controlled. 14. Trees are good absorbent of sound. 15. Sound travels faster in water than in metals.

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?

[Answered] Which statement accurately describes the relationship between mass and weight? A. An object with twice the mass of another object will weigh half as much. B. An object with twice the mass of another object will weigh one-fourth as much. C. An object with twice the mass of another object will weigh four times as much. D. An object with twice the mass of another object will weigh twice as much.

[Answered] When a gas filled in a closed vessel is heated by raising the temperature by 1°C, its pressure increases by 0.4%. What is the initial temperature of the gas in K?

[Answered] A motorcycle weighs 2,009 newtons. The mass of the motorcycle is _______ kilograms. Use g = 9.8 N/kg for gravity.

[Answered] An electric device delivers a current of [tex]$15.0 A$[/tex] for 30 seconds. How many electrons flow through it?