A 3,000 kg car accelerates from 4 m/s to a velocity of 11 m/s, what is the change in kinetic energy of the car in Joules? Do not include units in your answer.

A)   An iron nail with a mass of 12 gg absorbs 15 J of heat. If the nail was initially at 30 ∘C, what is its final temperature? Express your answer using two significant figures. B) When 47.1 J of heat is added to 13.8 g of a liquid, its temperature rises by 1.74 ∘C. What is the heat capacity of the liquid?

You are asked to study how much table sugar can be mixed or dissolved in water at different temperatures. The amount of sugar that can dissolve in water goes up as the water’s temperature goes up. What is the independent variable? Dependent variable? What factor is held constant?

If a glass of water and a lake have the same temperature, which has more thermal energy?

A metal sample weighing 128.00 grams and at a temperature of 98.2 degrees Celsius was placed in 45.50 grams of water in a calorimeter at 22.8 degrees Celsius. At equilibrium the temperature of the water and metal was 35.6 degrees Celsius.  What is the change in temperature of the metal (in degrees C)? (Report this as a positive value)

Constants I Periodic Table Part A How much heat must be absorbed by a 13.0 g sample of water to raise its temperature from 13.0 C to 40.0°C? (For water, C, = 4.18J/g C) Express your answer to three significant figures and include the appropriate units. Value Units Submit Previous Answers Request Answer X Incorrect; Try Again; 29 attempts remaining Provide Feedback acer

A heat pump is an electrical device that heats a building by pumping heat in from the cold outside. In other words, it's the same as a refrigerator, but its purpose is to warm the hot reservoir rather than to cool the cold reservoir (even though it does both). Let us define the following standard symbols, all taken to be positive by convention:Th = temperature inside buildingTe = temperature outsideQh heat pumped into building in 1 day Qe = heat taken from outdoors in 1 dayW = electrical energy used by heat pump in 1 day Explain why the "coefficient of performance" (COP) for a heat pump should be defined as Qh /W.

A student burns a small snack food item and finds that it releases 60,900 J of energy. How many Calories does this food item contain? Round your answer to the nearest 0.01 and include units, properly abbreviated.