Physics Topic 1 Let's get started Flashcards by Dr McMath

Give three safety rules and explain why they are important.

Examples: 1. DO NOT go into the laboratory without permission. - The lab can be a dangerous place and students need to be supervised when in the lab. 2. NEVER run or rush about the laboratory. You should not leave your seat without the permission of your teacher. - Rushing about could lead to an accident such as tripping and knocking over an experiment. 3. Leave floors and bench tops clear. Put bags and cases under the benches. - Bags should be put under benches and floors clear so that no one trips over anything. Work benches should be clear to allow for practical equipment to be set up safely.

How well did you know this?

Not at all

Perfectly

What is volume?

Volume is the space occupied by an object

How well did you know this?

Not at all

Perfectly

What is the symbol for volume?

How well did you know this?

Not at all

Perfectly

What are the units of volume?

mm³(millimetres cubed), cm³, m³, l (litre), ml (millilitre)

How well did you know this?

Not at all

Perfectly

Volume =

Volume = Length x Breadth x Height

How well did you know this?

Not at all

Perfectly

What are the units of length, breadth and height?

mm, cm, m

How well did you know this?

Not at all

Perfectly

When would you use (i) cm³ and (ii) ml to measure volume?

(i) volume of a box or liquid (ii) volume of a liquid only

How well did you know this?

Not at all

Perfectly

V =

l x b x h (all lower case)

How well did you know this?

Not at all

Perfectly

A box measures 3cm by 2cm by 5cm what is its volume?

You must show your working out to get full marks: V = l x b x h = 3 x 2 x 5 = 30 cm³

How well did you know this?

Not at all

Perfectly

A box measures 4m by 200cm by 3m what is its volume?

You must show your working out to get full marks:

All units need to be the same i.e. 200cm = 2m

V = l x b x h

= 4 x 2 x 3

= 24 m³

V = l x b x h

= 400 x 200 x 300

= 24000000 cm³

How well did you know this?

Not at all

Perfectly

To read volumes of liquids ACCURATELY, it is essential to read the volume with the eye in line with….

….the top of the water level at the bottom of the MENISCUS.

How well did you know this?

Not at all

Perfectly

Label the meniscus.

Meniscus

How well did you know this?

Not at all

Perfectly

How would you measure the volume of an irregular object?

Half fill a measuring cyclinder and record the volume.

Attach a sting to the object and lower it into the water.

(The object must be completely covered by water, if not start again with more water)

Note the new volume.

Take the intial volume from the final volume, this is the volume of your object.

How well did you know this?

Not at all

Perfectly

What is mass?

Mass is the measure of the amount of metter (or stuff) in an object.

How well did you know this?

Not at all

Perfectly

What is the symbol of mass?

m (must be lowercase)

How well did you know this?

Not at all

Perfectly

What are the units of mass?

kilograms (kg) or gram (g)

How would you measure the mass of 1 staple, note it is too light to register on the balance.

Weigh the mass of e.g. 20 staples and divide the answer by 20.

What is temperature?

Temperature is how hot an object is.

What is the symbol of temperature?

What are the symbols of temperature?

^oC

What are the following temperatures:

(i) boiling point of water
(ii) melting point of water
(iii) body temperature

(i) 100 ^oC
(ii) 0 ^oC
(iii) 37 ^oC

What are the following temperature?

Remember units!

8 cm³

27 cm³

6 cm³

53 cm³

Where are the following temperatures on the blank thermometer?

(i) 36 ^oC, (ii) 75 ^oC, (iii) 49 ^oC, (iv) 73 ^oC

Careful with your scale.

What is the definition of density?

Density is the mass of 1 cm³ of material.

What is the equation and units for density?

Density = Mass/Volume units = grams per cubic centimetre or g/cm³

Calculate the density of a block of copper 3 cm long, 2 cm high, 2 cm in breadth & with a mass of 108g.  

V = l x b x h = 3 x 2 x 2 = 12 cm³ D = m/V = 108 / 12 9 g/cm³

Calculate the density of block of aluminium of length 5 cm, height 1 cm, breadth 2 cm & a mass of 27g 

V = l x b x h ## Footnote = 5 x 1 x 2 = 10 cm³ D = m/V = 27 / 10 2.7 g/cm³

Calculate the density of a block of zinc with length 4 cm, breadth 1 cm, height 3 cm & a mass of 85g.

V = l x b x h ## Footnote = 4 x 1 x 3 = 12 cm³ D = m/V = 85 / 12 = 7.1 g/cm³

Explain why an object (i) floats & (ii) sinks in water

(i) If an object has a density less than the density of water (1 g/cm³) it will float in water (ii) If an object has a density greater than the density of water (1 g/cm³) it will sink in water

John and Mary wanted to find out how quickly the water in their electric kettle cooled down after the kettle had been switched off. They put some water in the kettle and boiled it. They agreed they should measure the temperature every five minutes. This is what they wrote down: Start 95, 72, 64, 50, 40, 33, 27, 23, 20, 20 finish ## Footnote This is not a very good way of writing down the results. Record the results in a suitable format.

Draw a graph for the data. What are the variables and what is the relationship between them?

Graph Variables are 'temperature T / ^oC' and 'time t / min'. As the time increases the temperature decreases.

Put the following information about height and mass into a suitable table: Susan 142 cm 35 kg Lee 144 cm 42 kg Clark 146 cm 31 kg Veena 148 cm 43 kg Robert 149 cm 34 kg Sharon 151 cm 38 kg

What are the variables shown in the table? Is there a relationship between the variables, explain your answer?

Variable: Height & Mass No relationship as when the height is increased the mass does not follow a trend.

What variable are shown by the containers in the diagram? Describe the trend in containers B, C & D. Describe a trend for containers A & E.

Height and width of the container. With B, C & D as the height increases the width increases. With A & E as the height increases the width decreases.

What are the following hazard symbols?

flammable harmful/irritant toxic corrosive