Pls someone help me pl How is energy transferred between objects or systems? Identify an event for which you cite the evidence of

energy being transferred

You are making a solution of calcium chloride dissolved in water. you add solid, stir, and it dissolves. you add just a spatula tip full, stir, and the solid does not dissolve. how could you describe the solutions before and after adding the spatula tip amount

Apiece of metal with a length of 1.42 cm was measured using four different instruments. which of the following measurements is the most accurate?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.