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23 Cards in this Set
- Front
- Back
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What is the formula for pressure |
P=F/A. |
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What does F and A stand for? |
Force and area |
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What are the units that force and area are in? |
Force= N. Area=m^2 |
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What is 1 N/M^2 equal to in PA? |
1 Pa = 1n/m^2 |
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What is the unit for pressure? |
KPA. |
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What's the formula for density? |
D=M/V (density equals mass divided by volume) |
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The volume of a flask is 574cm^3. The starting mass was 229.37g and the finishing mass was 228.72g. what is the density? |
O.65/574cm^3 equals 1.1x10^-3g/cm^3. = 1.1kg/m^3 |
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How do you calculate the density of liquid? |
Measure the mass of a measuring cylinder. Pour liquid into the measuring cylinder, note the volume Measure the mass of the measuring cylinder + liquid. Calculate the mass of the liquid. Calculate the density of the liquid. |
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How do you calculate the density of an irregular shape? |
Measure the mass of the object. Put water in the measuring cylinder measure the volume. Put object in the water so it covers object, measure the new volume Calculate the volume of the object. Calculate the density of the object. |
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What is a series circuit? |
A series circuit is one where there is only one route for the current to take. We connect ammeters in series to measure current flowing if one component, for example, a lightbulb were to break then the following components would fail to work. Imagine it like a TV series. |
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What is a parallel circuit? |
A parallel circuit is one whether two or more different rates for the current to take. Voltmeters are connected in parallel. A layout of parallel circuit is usually parallel... that's how you remember genius. |
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What do these symbols stand for in a circuit diagram? |
1. Open switch 2. Closed switch 3. Cell 4. Battery 5. Variable power supply 6.fuse 7. Variable resistor. |
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What do these symbols represent in a circuit diagram? |
1. Lamp 2. Resistor 3. Voltmeter 4. Ammeter 5. LED |
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What is weight? |
Weight is a force that acts towards the centre of the Earth. |
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What do all forces have? |
All forces have both a magnitude (size) and a direction and are measured in Newton's |
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What does Mass measure? |
Maths measures the amount of matter in something and does not have a direction. |
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What is Ohm's law? |
Different fixed resistors have results that are a straight line through the origin. the three lines had different gradients due to the different resistances. From this you can conclude that voltage current and resistance are interrelated the relationship is called Ohm's law. |
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What is the formula for Ohm's law? |
Voltage = current x resistance. (V = IR) |
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Describe what happens as you change the setting on a variable resistor. |
When the resistance on the voltage increase is the bulb dims and when the resistance decreases, the bulb lightens. We can conquer that different resistances affects the voltage and brightness of the bulb along with current. |
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What is displacement? |
Displacement is the straight line distance moved in a particular Direction; distance how far objects has moved. |
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What is velocity? |
Velocity is the same as speed and it is measured in m / s but it also has a direction. Velocity is an example of a vector. |
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What is the formula to calculate a vector? Velocity? |
Vector = size +.Direction Velocity = speed + Direction |
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How do you calculate acceleration? |
Acceleration (m/s^2)= change in velocity ÷ time taken. A=V-U/T. |
