Questlon 3 of 10 Samples of different materials, A and B, have the same mass, but the sample of A is higher in density. Which statement could explain why this is so? A. The sample of material A has greater volume than the sample of material B.

B. The particles that make up material B are more closely packed together than the particles that make up material A.

C. The particles that make up material A have more mass than the particles that make up material B.

D. The particles that make up material B have more mass than the particles that make up material A.​

Acommercial refrigerator with refrigerant-134a as the working fluid is used to keep the refrigerated space at -35°c by rejecting waste heat to cooling water that enters the condenser at 18°c at a rate of 0.25 kg/s and leaves at 26°c. the refrigerant enters the condenser at 1.2 mpa and 50°c. if the compressor consumes 3.3 kw of power, determine (a) the mass flow rate of the refrigerant, (b) the refrigeration load, (c) the cop, and (d) the minimum power input to the compressor for the same refrigeration load.

Why is the use of carbon-14 limited

Simon is writing a story about an astronaut whose spacecraft has been boarded by space pirates. the astronaut has her lucky penny in her hand behind her back as the space pirates break into the control room. she has just locked the controls so that the ship is accelerating in the direction of the control room’s ceiling. simon wants the astronaut to use the penny to hit a button on the control panel to turn off the lights and escape. the button is located a short distance behind and below the astronaut’s hands. how should simon use the theory of relativity to describe what the astronaut must do in order to hit the button?