Answer:
Light does not need a medium to travel travel through, but since waves must have a medium to vibrate, sound is not created where no air is present.
Explanation:
Answer: D. They conduct thermal and electrical energy.
Explanation:
Answer:
... As has been previously discussed, heat is not something that is contained in an object.
Explanation:
Answer: A. 6.68m/s east
Explanation: just did it on ap3x
Answer:
<h2>4000

</h2>
Explanation:
The temperature of 0.1 kg of liquid rises from 25°C to 50°C in 300 sec. Energy of 13,600 J was supplied during this time. Appartus was losing energy at the rate of 12 J/sec.
Let us assume the Specific heat capacity as
.
As there is no state change from liquid to gas, only Specific heat capacity is involved. Also, work done is approximately zero because volume does not change much. So,
Energy gained = Energy required to rise the temperature
Energy gained by liquid = 

∴ Specific heat capacity of liquid = 4000