You hold a thumbtack between your index finger and thumb with a force of 10 n. the needle has an area of 1 x 10-7 m2 whereas the flat end has an area of 3 x 10-4 m2.
what is the force experienced by our finger; what is the force experienced by your thumb.
your thumb holds the pointy end. what is the pressure on the thumb; what is the pressure on your finger?
a 16.48 g sample of an unknown metal, heated to 99.0 °c was then plunged into 50.0 ml of 25.0 °c water. the temperature of the water rose to 28.1 °c. assuming no loss of energy to the surroundings:
how many joules of energy did the water absorb?
b. how many joules of energy did the metal lose?
c. what is the specific heat of the metal?