Classify each of the following changes as chemical or physical: crushing physical rock adding antifreeze to a car radiator scorching butter chemical physical

How many kilocalories did the patient obtain from the lunch? Express the energy as an integer and include the appropriate units

Consider the two spheres shown here, one made of silver andthe other of aluminum. (a) What is the mass of each spherein kg? (b) The force of gravity acting on an object is F = mg,where m is the mass of an object and g is the acceleration ofgravity (9.8 m/s2). How much work do you do on each sphereit you raise it from the floor to a height of 2.2 m? (c) Does theact of lifting the sphere off the ground increase the potentialenergy of the aluminum sphere by a larger, smaller, orsame amount as the silver sphere? (d) If you release thespheres simultaneously, they will have the same velocitywhen they hit the ground. Will they have the same kineticenergy? If not, which sphere will have more kinetic energy?[Section 1.4]

If calorie raises the temperature of 1ml of water by 1ºC, how many calories are needed to raise the temperature of 50 ml of water by 1ºC?

3. The "Farmhand Cut" of prime rib at Farmer Browns Steak House weighs in at 20 ounces, of which 6.0 ounces is good old Nebraska beef fat. A person on a 2400 calorie per day diet should not consume more than 800 calories from fat. If fat contains 9.0 calories per gram, is this steak within the 800 calorie limit?

Which of the following is an example of a nonspontaneous process? Solid water (ice) subliming in a freezer Electroplating gold metal onto a circuit board O A hot skillet cooling O Ammonium nitrate dissolving in water

Perform the conversions between energy units  9.69 x 10^6 J = ? Kcal

All chang 4. A book held 1 meter above the floor has potential energy. The book is dropped and hits the floor. To what types of energy has the potential energy of the book been converted? chemical, mechanical and heat O kinetic, sound and heat O sound, chemical and mechanical O kinetic, chemical and sound

Are the following processes exothermic or endothermic?ol type='a'>• When solid KBr is dissolved in wate1 the solution gets colder.i>Natural gas (CH4) is burned in a furnace."i> When concentrated sulfuric acid is added to water, the solution getsvery hot.i> Water is boiled in a teakettle.

A teaspoon of the carbohydrate sucrose (common sugar) contains 16 Calories (16 kcal). What is the mass of one teaspoon of sucrose if the average number of Calories for carbohydrates is 4.1 Calories/g?