The sum of two vectors of fixed magnitudes has its minimum magnitude when the angle between these vectors is
A) 0°
B) 90°
C) 270°
D) 180°
E) 360°
D
Physics & Space Science
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An ideal gas is allowed to expand slowly at constant temperature to twice its original volume. During the expansion, the gas absorbs 200 kJ of heat
(a) What is the change in the internal (thermal) energy of the gas during the expansion? (b) How much work does the gas do during the expansion? What will be an ideal response?
Physics & Space Science
An Earth satellite is simply a projectile
A) freely falling around Earth. B) floating motionless in space near Earth. C) approaching Earth from outer space.
Physics & Space Science
State Avogadro's hypothesis
What will be an ideal response?
Physics & Space Science
Two uses of ultrasound are navigation by bats and controlling insects
Indicate whether the statement is true or false
Physics & Space Science