A 5.00 kg mass is at the origin. A 7.00 kg mass is located at x = 0.600 m,
and a 4.00 kg mass is at x = 0.900 m.
What is the net gravitational force on
the 5.00 kg mass?

The sample with the lowest specific heat capacity will have the greatest temperature increase. in this case, it would be platinum.

Special care would be an answer

Each student aligns the edge of the object with the left edge of the ruler as shown above. all four students read the ruler with a measurement of 4.6 cm. which statement describes the data they collect? i believe the answer is: the data have poor precision and poor accuracy because of a systematic error.

Sounds propagates through some kind of medium. usually it's air, but it goes just as well through solid objects like walls, windows etc. a soundwave will compress the (air)molecules in front of it, and if this increased density wave hits your ears, you register it as sound. solid objects like walls are a lot denser than air, this means that they will damp a wave, but also carry it easier.