Compared to a glass of ice with ice, a glass of plain ice-cold water without ice

Question

Compared to a glass of ice with ice, a glass of plain ice-cold water without ice on a warm day will warm up. faster. in the same amount of time. slower. Which law of thermodynamics states that no system can reach absolute zero? second law third law first law all of the above Lobsters live on the bottom of the ocean. Compared with the density of seawater, the density of a lobster is the same. Less. greater. A girl pushes a cart to the left with a 100-N force. A boy pushes it to the right with a 50-N force. The net force exerted on the cart is 50 N to the right. 100 N to the right. 50 N to the left. 100 N to the left. A 3000-N bear grasping a vertical tree slides down at constant velocity. The friction force between the tree and the bear is 3000 N. 30 N. 300 N. more than 3000 N A 50-N object falling in air experiences 50 N of air resistance. The amount of net force on the falling object is 25 N. 0 N. 50 N. 100 N. Heat energy is measured in units of calories. joules. degrees. both joules and calories. Sublimation is a change of phase from solid to gas without passing through the liquid phase. a transfer of energy. a change of temperature. Which of the following units represents the largest unit of length? cm dm nm mm A car has a mass of 1000 kg and accelerates at 2 m/s^2. What is the magnitude of the force exerted on the 1000N 1500N 2000 N 500 N none of the above Exert 100 J in 50 s and your power output is 4 W. 2 W. more than 4 W. 1/4 W. 1/2 W.

Explanation / Answer

a. The glass of plain ice cold water will warm up faster as it requires less heat to reach the room temperature. The glass with ice will require heat first to melt the ice and then to attain room temperature thus taking more time.

b. Third law states that entropy of a perfect crystal at absolute zero is zero, but according to second law the entropy of a system always increases with time. Therefore third law indicates that absolute zero cannot be attained.

c. The density of lobster is greater than sea water because they are sinking in sea water and according to buoynancy a body sinks if its density is more than that of the fluid.

d. The force exerted will be 50N to thje left because the girl is exerting more force or the difference of force is greaterin the left.

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