Relativistic time-dilation means that astronauts aboard a spaceship traveling close to the speed of light will actually age less than their families left behind on the Earth
Indicate whether the statement is true or false
TRUE
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The symbol indicating the number of nucleons in a nucleus is __________
Fill in the blank(s) with correct word
A Nichrome wire has a radius of 1.3 mm and a resistivity of 1.5 × 10^?6 ??m. If the wire carries a current of 1.8 A, what is the potential difference per unit length along this wire?
a. 0.19 V/m b. 0.51 V/m c. 0.66 V/m d. 6.4 V/m e. 5 V/m
Which has a larger mass, a liter of water or a liter of mercury (a liquid metal)?
a. mercury b. water c. none of these
A hot (70°C) lump of metal has a mass of 250 g and a specific heat of 0.25 cal/g•°C. John drops the metal into a 500-g calorimeter containing 40 g of water at 20°C. The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g•°C. When equilibrium is reached, what will be the final temperature? (cwater = 1.00 cal/g•°C.)
a. 114°C c. 40°C b. 72°C d. 37°C