A heat pump is used to keep a house warm at 22 degrees Celsius. (a) How much work is required of the pump to deliver 2900 J of heat into the house if the outdoor temperature is 0 degrees...
A heat pump is used to keep a house warm at 22 degrees Celsius. (a) How much work is required of the pump to deliver 2900 J of heat into the house if the outdoor temperature is 0 degrees...
The value of specific heat for copper is 390 J/kg⋅C°, for aluminum is 900 J/kg⋅C°, and for water is 4186 J/kg⋅C°. (a) What will be the equilibrium temperature in degrees Celsius when...
A 10-g sample of a cookie is allowed to dry before putting it in a bomb calorimeter. The aluminum bomb has a mass of 0.615 kg and is placed in 2.00 kg of water contained in an aluminum calorimeter...
1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...
1. A fireworks shell explodes H=110 m above the ground, creating colorful sparks. How much greater is the sound level of the explosion for a person at a point directly below the explosion than for...
1. A string is under a tension of 750.0 N. A 1.7 m length of the string has a mass of 4.8 grams. What is the speed of a transverse wave of wavelength 0.50 m in this string? What is the frequency of...
1. Given that the specific heat of water is 1.00 cal/(g*C), what is the specific heat in Joules/(kg*K)? 2. If 700 grams of a metal requires 95 calories of energy to raise its temperature...
Assume the speed of sound is 331 m/s. 1. You have an open tube that is 1.3 m long. a. What is the fundamental frequency and wavelength of the tube? b. What is the third harmonic...
1. What kind of collision does conserve momentum? What kind of collision does not conserve mechanical energy? 2. A bullet with a mass of 52 grams moving with a speed of 100 m/s slams...
Part A. Phosgene (carbonyl chloride), COCl2, is an extremely toxic gas that is used in manufacturing certain dyes and plastics. Phosgene can be produced by reacting carbon monoxide and chlorine gas...
For the reaction: CO(g)+NH3(g)<->HCONH2(g) The equilibrium constant is: K=0.207 at 400 K. If a reaction vessel is filled with initial concentrations 2.15M of CO and 2...
1. Cart A has a mass of 265 grams. Cart B has a mass of 445 grams. The carts are on a frictionless track. Cart B is initially at rest. Cart A is initially moving towards Cart B at a...
The reversible chemical reaction: A+B<->C+D has the following equilibrium constant: Kc=[C][D]/[A][B]=4.1. (a) Initially, only A and B are present, each at 2.00 M. What...
A. What is the period of rotation? B. What is the velocity if the object is 14 cm from the center of rotation? C. What is the centripetal force on a 35 g mass spinning 14 cm from the center...
1. Make two free body diagrams for a falling coffee filter: one at the instant when it is released and the other after it has reached terminal velocity. Your diagrams should include numerical values...
1. Give three factors that affect the amount of air resistance an object experiences, and describe how each factor influences air resistance (will the air resistance go up, or go down if that variable...
Compute the normal force on the block. M=47.3 kg and theta=31.0 degrees
The rate of reaction in terms of the "rate law expression" includes the rate constant (k), the concentration of the reactants, and the orders of the reaction with respect to the different...
The rate of the reaction in terms of the "appearance of product" includes the change in the concentration of the product, the time interval, and the coefficient of the product. Consider...
The rate of the reaction in terms of the "disappearance of reactant" includes the change in the concentration of the reactant, the time interval, and the coefficient of the reactant. Consider...