What is the change in internal energy if 70 j of heat is added to a system and the system does 30 j of work on the surroundings?

a. 40 j
b. 100 j
c. -40 j
d. -100 j

Jessie ran 5000 meters from the cops and an average speed of 6 meters / second before he got caught . how long did he run?

A51 kg woman skis down a hill and her kinetic energy is 9.96e4 j. what is her speed?

Sasha has just gotten a new job in a nearby city. after comparison shopping, she found that renting a nice two-bedroom apartment would cost around $800 per month. her utilities would cost about $150 per month. sasha has enough money saved for a down payment, and she found that she can buy a three-bedroom house or condo with a mortgage payment of $1,000 per month, including taxes and homeowner's insurance. her utilities would cost about $200 per month. what is the advantage of buying the house over renting the apartment?