The diagram below shows the heating of an unknown substance (it is not water). Its melting point is? The diagram below shows the heating of an unknown substance. (It is NOT water). Its melting point is: a. between 35⁰C and 70⁰C

b. 70⁰C

c. between 70⁰C and 140⁰C

d. 140⁰C

Tungsten-filament lightbulb emits light based on the temperature of the filament. which phenomenon does this demonstrate?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Aprojectile is launched from ground level with an initial velocity of v 0 feet per second. neglecting air resistance, its height in feet t seconds after launch is given by s equals negative 16 t squared plus v 0 t. find the time(s) that the projectile will (a) reach a height of 192 ft and (b) return to the ground when v 0equals112 feet per second. (a) find the time(s) that the projectile will reach a height of 192 ft when v 0equals112 feet per second. select the correct choice below and, if necessary, fill in the answer box to complete your choice.