An endothermic reaction will start when the required δh energy is received from the environment or solution. true or false.

Ahorizontal wire is tied to supports at each end and vibrates in its second-overtone standing wave. the tension in the wire is 5.00 n, and the node-to-node distance in the standing wave is 6.28 cm. (a) what is the length of the wire? (b) a point at an anti- node of the standing wave on the wire travels from its maximum upward displacement to its maximum downward displacement in 8.40 ms. what is the wire's mass?

Pls pls pls pls ! describe, in your own words, how you found the epicenter of the earthquake.

Two cans on a sunny window one black and the other white construct and explanation of the effect of sun will have on both cans over a two hour period?