A calorimeter contains 1.25 kg of water at 21.5°C. A 0.15-kg block of an unknown substance at 65.5°C is placed in the water. The final temperature of the system is 22.0°C. What is the specific heat of the substance? What could the substance be? ​

Current 1 of 8.4 a runs for 240 seconds and then stops. current 2 is 10.5 a. how long does current 2 have to un to deliver the same amount of charge as current 1? 88.28 192 s 2016 s 21,000 s

Agroup of students were investigating the force of gravity. they began by dropping a foam ball from a height of 3 meters into a bucket of sand. the ball hit the sand in 0.306 seconds. they dropped additional balls of approximately the same diameter, but of different masses. here is the data they collected. based on this experiment and the collected data, what would their conclusion be?

Will mark as brainliest how does a catapult increase the trajectory of an object? ps. answer as if u were a 5th grader