An electric bell is placed inside a transparent glass jar. the bell can be turned on and off using a switch on the outside of the jar. a vacuum is created inside the jar by sucking out the air. then the bell is rung using the switch. what will we see and hear?
a) we’ll see the bell move, but we won’t hear it ring.
b) we won’t see the bell move, but we’ll hear it ring.
c) we’ll see the bell move and hear it ring.
d) we won’t see the bell move or hear it ring.
e) we’ll see the sound waves exit the vacuum pump.

Asystem containing an ideal gas at a constant pressure of 1.22×10^5 pa gains 2140 j of heat. during the process, the internal energy of the system increases by 2320 j. what is the change in volume of the gas?

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?