# Search results

1. ### Difference between fluorescent strip and compact fluorescent lamp

I just want to know the difference between fluorescent strip and compact fluorescent lamp... Thanks.
2. ### Specific heat capacity and final temperature

Homework Statement A 2.8 kg sample of a metal with a specific heat of 0.43KJ/KgC is heated to 100.0C then placed in a 50.0 g sample of water at 30.0C.* What is the final temperature of the metal and the water? Homework Equations heat loss by the metal = heat gain by the water The...
3. ### Specific Heat Capacity of aluminum rivets

Homework Statement Some aluminum rivets of total mass 170 g at 100°C are emptied into a hole in a large block of ice at 0°C' a. What will be the final temperature of the rivets? b. How much ice will melt? Homework Equations none The Attempt at a Solution Please help me answer...
4. ### Throws a stone horizontally with a velocity of 20ms-1

Homework Statement 1. Don Joriel stands on a vertical cliff edge throwing stones into the sea below. He throws a stone horizontally with a velocity of 20ms-1, 560 m above sea level. a. How long does it take for the stone to hit the water from leaving Don Joriel’s hand? Use g =...
5. ### Percentage uncertatainty

Homework Statement In a simple electrical circuit, the current in a resistor is measured as 2.5 ± 0.05 mA. The resistor is marked as having a value of 4.7 Ω ± 2%. If these values were used to calculate the power dissipated in the resistor, what would be the percentage uncertainty in the...
6. ### HELP: Work Done

Homework Statement A box of weight 200N is pushed so that it moves at a steady speed alog a ramp, through a height of 1.5m. The ramp makes an angle of 30° with the ground. The frictional force on the box is 150N while the box is moving. What is the work doe by the person? Homework...
7. ### Specific Heat Capacity of Tantalum

I got a problem with this one, please help me, Tantalum is an element that is used in aircraft parts. Tantalum has a specific heat capacity of about 140 J/kg K. The aircraft part has a mass of 0.23 kg and is cooled from a temperature of 1200 K by being placed in water. If 30000 J of heat is...