Reference no: EM133969

Question1

The unique temperature of the water in the large bowl was 25°C.
The temperature of a molecule that changes from liquid to gas is 100 °C.
The relationship: 1 cup of water is 236 grams of water.

How many kilojoules (kJ) of energy were needed to “move” water from a large bowl to the small glass? 
Notes- Ignore an amount of water that was not “moved” water molecules have to warm AND change state?

Question2

Bob, who has a mass of 82, can throw a 900 rock with a speed of 26. The distance throughout which his hand moves as he accelerates a rock forward from rest until he releases it is 1.1 .What constant forces should Bob exert on a rock to throw it with this speed?
If Bob is standing on frictionless ice, what is his recoil speed after releasing that rock?

Question3

a. considered frequency and draw the nodal maps (vertically). Suppose string density = 0.005 kg/m, and length between supports = 1.75 m

b. Fill in boxes for "Frequency from equation 1". Imagine the tube length = 50 cm