Paper 2; Topics 5-8

Question 1

Equation for force on a spring?

Answer 1

Force= Spring Constant x Extension

Question 2

Equation for Elastic Potential Energy?

Answer 2

Elastic Potential Energy= 0.5 x spring constant x extension

Question 3

Equation for a moment?

Answer 3

Moment = Force x Distance

Question 4

Equation for fluid pressure?

Answer 4

Pressure= height/depth of the column of liquid x Density of the liquid x Gravitational Field Strength

Question 5

Equation for Acceleration?

Answer 5

Change in Velocity divided by time

Question 6

Equation for Constant/ Uniform Acceleration

Answer 6

Final Velocity squared - Initial velocity squared = 2 times Acceleration x Distance

Question 7

What is Drag?

Answer 7

The resistance you get in a fluid i.e. air resistance. It increases with speed.

Question 8

Terminal Velocity?

Answer 8

Objects falling through fluids reach a terminal velocity.

Question 9

Equation for Resultant force?

Answer 9

Resultant force = mass x acceleration

Question 10

What the actual fuck is inertia and why am i only hearing about it now?

Answer 10

An object’s inertial mass measures how difficult it is to change the velocity of an object. Inertial mass is just the ratio of force over acceleration.

Question 11

Equation for force.

Answer 11

Change in momentum x change in time

Question 12

Hey Bea, Why don’t you try and learn the electromagnetic spectrum the day of your GCSE exam because your a fucking idiot? Go ahead, fuckface.

Answer 12

Radio Waves, Micro Waves, Infa Red, Visible Light, Ultra Violet, X rays, Gamma Rays.

Question 13

What are Radio waves and How are they used?

Answer 13

They are made up of alternating currents of electric and magnetic fields. They are fucking stressing me out. Little oscillating bastards. They are long-wave radio lengths (1-10km) so they can diffract ( bend) so they can travel halfway around the earth by curving and round hills and into tunnels, so they are mainly used for communication. Short- wave radio signals (10m-100m) are what blue tooth uses and what TV and FM radio use.

Question 14

What are Microwaves?

Answer 14

Microwaves are used by satellites. They do that whole transmitter to space satellite to satellite dish thing. Microwave ovens use a different wavelength from satellites, because they need to be absorbed by water molecules in food, which causes it to heat up.

Question 15

What is Infrared?

Answer 15

It’s given out by every object, the hotter the object, the ore is given out. Infrared cameras turn this into an electrical current to make heat specific colours. It can cook things, as absorbing it causes something to heat up. Its also what’s in electric heaters.

Question 16

What does visible light do?

Answer 16

Fibre Optic Cables use Visible Light to Transmit Data. Optical fibres are thin glass or plastic fibres that can carry data such as visible light. They work because of reflection.

Question 17

What is Ultraviolet Radiation?

Answer 17

It causes flourescence. Flourescence is a property where ultra violet is absorbed and then visible light is emmitted. Flourescent lights generate UV radiation which is turned to visible by a layer of phosphorus. UV radiation is produced by the sun and gives you a suntan.

Question 18

How are X rays and Gamma Rays used in Medicine?

Answer 18

X rays can pass through flesh but not bones or metal. X rays and Gamma Rays are used to kill cancer, as they can kill all cells in large doses, so they are specifically directed to the cancer cells. These can be dangerous, so radiographers where lead coats and stand behind a lead screen or leave the room.

Question 19

Harms of EM radiation.

Answer 19

A bunch of bad shit. Radio waves don’t do shit but UV rays can make your skin get clapped make you go blind and give you cancer. X rays and Gamma Rays can cause genetic mutation, cell destruction and cancer holy fuck this is stressful.

Question 20

Sieverts are fucking stupid so why don’t you memorise what they are?

Answer 20

They are a measure the risk of harm from the body being exposed to a certain dose of radiation. They show that the chest is more subject to harm than the head. 4 times more.

Question 21

Utra ound in medicine?

Answer 21

Can’t completely pass through two different medias so it changes from the womb juice to the foetus skin and makes an image i dont care.

Question 22

Seismic Waves?

Answer 22

They are caused by earthquakes and Explosions.

Question 23

Do that whole magnetism bullshit from your book.

Answer 23

I hate physics.

Question 24

Do the space bullshit from your book too.

Answer 24

You’re doing great.

Question 25

remember why you are doing this.

Answer 25

Pretty soon, you can be free, and you can find out if he really feels the same way.