Specific heat capacity of ice = 2,000 J/kg-°C latent heat of fusion of water = 334,000 J/kg specific heat capacity of water = 4,000 J/kg-°C A 1 kg block of ice is removed from a freezer where its temperature was –10°C. The amount of heat absorbed by the ice as it warms to 0°C is __________
Fill in the blank(s) with correct word
20,000 J
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What property of a molecular cloud does not counteract gravitational contraction?
A) thermal pressure B) turbulent motions C) magnetic fields D) fragmentation
A uranium nucleus (mass 238 units) at rest decays into a helium nucleus (mass 4.0 units) and a thorium nucleus (mass 234 units). If the speed of the helium nucleus is 1.8 × 10^6 m/s, what is the speed of the thorium nucleus?
a. 1.0 × 10^4 m/s c. 3.6 × 10^4 m/s b. 3.1 × 10^4 m/s d. 4.1 × 10^4 m/s
A disk has a moment of inertia of 3.0 × 10^-4 kg•m2 and rotates with an angular speed of 3.5 rad/sec. What net torque must be applied to bring it to rest within 3.7 s?
a. 4.6 × 10^-4 N•m c. 3.5 × 10^-4 N•m b. 7.5 × 10^-4 N•m d. 2.8 × 10^-4 N•m
Two bodies of equal mass m collide and stick together. The quantities that always have equal magnitude for both masses during the collision are
A. their changes in momentum. B. the force each exerts on the other. C. their changes in kinetic energy. D. all of the above. E. only (a) and (b) above.