NURSING 324 PHYSICS 1 | Best for 2022 Exam Revision | PDF |

Question 10 If the force of an object remains the same, but the mass of the object decreases to half, the acceleration of the cart: Does not change Changes unpredictably Halves Doubles This is an example of Newton’s Second Law. When you push a cart, it will start with a greater speed with first pushed, but the rate at which is gains speed, remains the same. Between water and sand, which takes longer to warm in sunlight and longer to cool at night? They cool and heat at the same rate Water sand Sand heats and cools faster than water. Why would sand heat and cool faster than water? Sand has a higher specific heat capacity than water. Sand has a lower specific heat capacity than water. Water has a lower specific heat capacity than sand. Water has a higher specific heat capacity than sand. Sand has a lower specific heat capacity than water. Consider heating a beaker of water. If you want to add 5 calories of heat to 1 gram of water, how will the temperature change? It will increase to 1ᵒC. It will increase to 1ᵒC. It will increase to 5ᵒC. It will decrease to 5ᵒC. Heat calories are proportional to the temperature. So, if you add 5 calories of heat to 1 gram of water, you’ll raise the temperature of the glass by 5◦C. Question 4 What happens to energy when you hold a cube of ice in your hand? Simultaneously, cold flows from the ice to your hand, and heat flows from your hand to the ice. Thermal energy flows from your hand to the ice Cold flows from ice to your hand. None of the above. When you hold the ice, thermal energy flows from you hand to the ice. Question 5 When a liquid or gas is heated, it expands and becomes less dense. The less dense material then rises, while cooler, more dense material sinks to take its place. This is known as: Radiation Condensation Conduction This is the definition of convection. Question 6 Let’s say you are drinking a hot cup of tea. The cup is full and acts as an insulator for the tea. In addition, you are using a spoon to stir your sugar. While in the glass, the spoon is acting as what? Condensor Convector Conductor Radiator Conduction occurs when two substances are in contact with each other, and the heat energy is transferred directly. The mechanism which this is occurs is a conductor. The spoon is acting as a conductor from the hot tea to your hand. Question 7 On a cold winter day, someone knocks on the door and you open it to see who it is. When the door opens, the house becomes cooler. How does this heat transfer occur? The warmer air from inside is not affected by the outside. The warmer air from inside is transferred The cooler air from outside is transferred inside. Heat is transferred from hotter materials to cooler materials. Question 8 What is defined as “the change of state of matter directly from solid to gas, bypassing the liquid phase? Sedation Sublimation