When a sample of water at 0.0°C is cooled to –36.0°C and freezes in the process, 935,000 kJ of thermal energy is liberated. What is the mass of this sample of water? For water LF = 334,000 J/kg, LV = 2
256 × 106 J/kg, and the specific heat of ice is 2050 J/kg ? C°. A) 2290 kg
B) 1145 kg
C) 2800 kg
D) 12,700 kg
A
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Energy in the Electric Field: A tiny particle carries a charge of 6.0 ?C. What is the energy density in the electric field at a distance of 4.0 m from this charge? (?0 = 8.85 × 10-12 C2/N ? m2, k = 1/4??0 = 9.0 × 109 N ? m2/C2)
A. 0.050 mJ/m3 B. 0.20 mJ/m3 C. 0.81 mJ/m3 D. 3.2 mJ/m3
Uranus's large axis tilt causes it to
A) have extreme seasonal variations. B) be very hot. C) be very cold. D) have very short days and nights. E) keep one side facing the Sun at all times.
What is the dominant feature of the lunar surface?
a. mountains b. rilles c. craters d. lobate scarps e. lava tubes
An air track cart with mass m and speed v moving along an air track collides with a stationary cart with a mass m/3. After the collision the first cart has a speed v/2. What is the speed of the second cart?
What will be an ideal response?