Determine the change in length of a 20-m railroad track made of steel if the temperature is changed from ?15°C to +35°C. (?STEEL = 1.1 × 10^?5/°C)
1.1 cm
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The ____________ of a radioactive substance is the amount of time for the substance to be reduced by half
Fill in the blank(s) with correct word
An object has a mass of 60 kg on Earth. What are the mass and weight of this object on the surface of the Moon where the acceleration of objects due to the gravitational attraction is only 1/6 of what it is on Earth?
What will be an ideal response?
What is (are) the unit(s) for the diffusion constant?
a. m2 b. m2/s c. It is unitless. d. m/s1/2
Conversion of Units: A large school district has 300 school buses. If each school bus is used 3.0 hours each day, the average speed of the school buses is 15 mi/h, and the fuel economy of the buses is 10 mi/gal. How much does it cost to run these buses for 22 school days if gasoline costs $4.10 a gallon?
A. $60,000 B. $120,000 C. $180,000 D. $240,000