Whether the statement is true or false.
Answer to Problem 1QAP
The statement is false because energy cannot travel faster than
Explanation of Solution
Energy is quantitative property that cannot be created or destroyed; it can only be transferred from one form to another. Various forms of energy are potential, kinetic energy, electric energy, etc. It can travel at very high speed; sound can travel with a speed of
Speed of light is the fastest speed in the universe. Light can travel in any medium or vacuum; it travels at a speed of
Therefore, nothing can travel faster than light in vacuum.
Conclusion:
Thus, the statement is false because energy cannot travel faster than
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Chapter 4 Solutions
Understanding Our Universe
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- For the Kinetic formula, Ek, is certainly the energy of a mass, m, motion, of course, is v2. Ek = 1/2 mv2 Ek = Kinetic energy m = mass of the body v = velocity of the bodyarrow_forwardHow much energy does a 2.0 kg mass gain if its speed changes from 2.0 m/s to 4.0 m/s? ( a) 12arrow_forward1. The nearest stars, apart from the Sun, are light-years away from Earth. If we are to investigate these stars, our space ships will have to travel at an appreciable fraction of the speed of light. (a) You are in charge of estimating the energy required to accelerate a 10,000 kg capsule from rest to 10 percent of the speed of light in one year. What is the minimum amount of energy that is required? (b) Compare your estimate to the amount of energy that the United States uses in a year about 5 x 1020 ). (c) Estimate the minimum average power required of the propulsion system. ((a) 4.5 x 1018 J, (b) 0.9%, (c) 1.4 x 1011 W)arrow_forward
- The sun produces energy by nuclear fusion reactions, in which matter is converted into energy. By measuring the amount of energy we receive from the sun, we know that it is producing energy at a rate of 3.8 x 1026 W. (a) How many kilograms of matter does the sun lose each second? Approximately how many tons of matter is this (1 ton = 2000 lb)? (b) At this rate, how long would it take the sun to use up all its mass?arrow_forwardAn electron has a rest mass of 9.11×10^(-28) g. a.) What is its mass in kg when moving with a speed of 0.95c_0? Express the answer in 4 significant figures. b.) What is the energy contained in the electron provided it is accelerated to the speed of light in kJ? Express the answer in 4 significant figures.arrow_forwardAre energy and matter able to be created or destroyed? Yes, they are constantly happening in the world. No, they are both conserved. Possibly, they cannot be proven or denied yet. They can be created, but not destroyed.arrow_forward
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