practicals

Question 1

T1 ripple tank practical

Answer 1

1. inside is a vibrating bar that is connected to a power pack
2. when bar vibrated it creates waved across the water surface
3. above tank is lamp and below is a sheet of paper
4. when light shines through paper it created an image of the waved on the paper
5. record using phone to slow down or freeze image of waves

Question 2

T2 Stretching a String

Answer 2

1. Place heavy weight on a clamp stand to stop it from falling over
2. Attach a metre ruler and a spring. Top of spring must be on 0 point in the metre ruler
3. The bottom on the spring had a wooden splint attached as a pointer that must be horizontal
4. Read position of pointer on the metre rule which is the unstretched value
5. Hang a weight on spring and read the value and continue from 1N-4N
6. Calculate extension= unstretched - stretched

Question 3

T2 Acceleration

Answer 3

1. Toy car is attached to a string and the string is attached to the pulley and the other end of the string is attached to a 100g mass
2. The weight of the mass will provide a force acting on the toy car
3. On desk draw chalk lines at equal intervals
4. Hold toy car at starting point and let go when ready
5. Record time the car reaches each distance marker
6. Repeat but decrease the mass at end of string

Question 4

T1 infrared 1+2

Answer 4

1. Get leslie cube with 4 different surfaces
2. Fill it with hot water
3. Point an infrared detector at each 4 surfaces and record amount of infrared emitted
4. Get 2 metals plates. One shiny and one Matte
5. Use Vaseline to attach drawing pins on the side
6. The temperature of the metal plates increase sure to infrared heater
7. Time when the pins fall off
   This is due to more absorbed infrared