A piece of copper is heated to 90°C and then lowered into a beaker of water at 20°C.

The copper transfers 3040 J of energy to the water before it is removed.

The temperature of the copper after it is removed is 50°C.

The specific heat capacity of copper is 380 J/kg °C.

Calculate the mass of the copper.

Which of the following is not a part of the respiratory system? a. pharynx b. trachea c. pancreas d. larynx

Choose the most likely outcome of this scenario: jen decided to go bike riding without a helmet. while no one is around during her ride, she is thrown from her bike when her wheel goes into a pothole. she is not injured, but she is terrified to get back on her bike. what happens next? a. her physical health is affected even though she wasn't hurt. b. her mental and emotional health are affected because she is afraid to get back on her bike. c. her social health is affected because she is worried her friends saw the fall. d. her overall health is not affected at all by her fall.

The sound level near a noisy air conditioner is 70 db. if two such units operate side by side, the sound level near the, would bea. 70dbb. 73 dbc. 105 dbd 140 db