When a 14.0-A current flows through an 8.00-? device for 24.0 hours, how much does this cost if energy costs $0.0900 per kW ? h?
A) $0.24 B) $3.39 C) $2.16 D) $1.04
B
Physics & Space Science
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Based on observations of the universal expansion, the age of the universe is about ________
A) 14,000 years B) 14 billion years C) 14 million years D) 14 trillion years
Physics & Space Science
Tides occur because the gravitational force of the Moon on Earth ____ with increasing distance from the Moon
a. stays constant b. increases c. decreases
Physics & Space Science
How much heat (in kcal) must be removed to make ice at ?10°C from 2 kg of water at 20°C? (The specific heat of ice is 0.50 cal/g?°C.)
A. 190 B. 200 C. 240 D. 210 E. 50
Physics & Space Science
Determine the change in entropy (in J/K) when 5.00 moles of an ideal gas at 0°C are compressed isothermally from an initial volume of 100 cm3 to a final volume of 20 cm3
a. ?191 b. ?52 c. ?71 d. ?67 e. ?208
Physics & Space Science