1. A 500 g piece of iron (Fe) changes 7°C when heat is added. How much heat energy produced this change in temperature? 2. When 300 J of energy is lost from a 125 g object, the temperature decreases from 45°C to 40°C. What is the specific heat of this object?

3. 1200 J of heat energy is added to a liquid with a specific heat of 0.57 J/g°C. If the temperature increases from 20°C to 33°C, what is the mass of the liquid?

4. If 50.0 grams of aluminum (Al) at 97°C is heated to 107°C, how many Joules are involved? 5. If 100 grams of metal at 100°C is cooled to 31.3°C, and heat given off is 2611 J, what is the specific heat of the metal? What metal is it?

PLEASE HELP NO BOTS OR I AM REPORTING!!

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

(newtons first law)

conservation of momentum law states :

momentum before collision = momentum after collision

momentum p (kg-m/s)= mass * velocity

say moving car=1 000 kg, velocity = 10 m/s then p = 1 000*10= 10 000 kg-m/s

say still car = 2 000 kg, velocity = 0 m/s then p = 2 000* 0 = 0 kg-m/s

total momentum prior to collision = 10 000 + 0 = 10 000 kg-m/s

momentum after collision = 10 000 kg-m/s

mass now = 1 000 kg+2 000 kg = 3 000 kg

10 000 = 3 000 kg* velocity m/s

10 000/3 000 = velocity

3.33 m/s = velocity after collision

an impulse is a force applied over time , momentum is exclusive of external forces and a perfect collision is implied