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

You lose 5 pounds over a 30-day period. Which of the following quantities act like astate function: the amount of calories you consume, your weight, or the number ofcalories burned through exercise?

A typical recipe for a hot toddy (a drink often used as a cold remedy) is to mix hot water withwhiskey, honey, and lemon juice. A patient heats 16 oz. of 22C water on the stove until it hasabsorbed 33 kcal of energy. He then mixes 2.0 oz. of the hot water with 1.5 oz. of roomtemperature whiskey (d = 0.94 g/cm3, cs = 3.40 J/g C, T = 22 C). What is the temperature of thehot toddy (prior to adding the remaining ingredients)?

When 56 J of heat are added to 11 g of a liquid, its temperaturerises from 10.4oC to 12.7oC. What is the heat capacityof the liquid?

not sure which way the arrows go on the right where it says " (s) -> (g) ↑?↓Ech " "takes:↑?↓T    ↑?↓P"

137 kJ to Calories.

Which has the greater kinetic energy, Object 1 with a mass of 2.9 kg and a velocity of 0.71 m/s or Object 2 with a mass of 1.3 kg and a velocity of 2.2 m/s? KE of Object 1 = J KE of Object 2 =| J |has greater kinetic energy. Object 1 Object 2 Retny Entire Groun O more aroun attempts remaining

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]

Kinetic energy is best characterized by heat transferred from a hot object to a cool one O energy contained in a chemical compound energy stored in a battery O relative position of particles a 99+

2. How many grams of N2 are needed to make -550.0 kJ? N2g) + 3H2g) 2NH3(g) AH = -92.6 kJ %3D