Measuring Physical Quantities

Questions and Answers

By using a ruler

By multiplying the length of its sides

By measuring its length, width, and height

By finding the change in the height of liquid in a measuring cylinder (correct)

500 kg/m3

1000 kg/m3 (correct)

1500 kg/m3

2000 kg/m3

Because it has a higher volume than water

Because it is less dense than water (correct)

Because it has a lower volume than water

Because it is denser than water

p = m/v Signup and view all the answers

To the nearest hundredth of a second Signup and view all the answers

Because it is denser than water Signup and view all the answers

Study Notes

The period of one oscillation can be measured by timing 20 oscillations and dividing by 20.

The volume of a cube or cuboid is found by measuring the length of its three sides and multiplying them together.
The volume of a liquid can be measured using a measuring cylinder, where the bottom of the meniscus appears on the scale when viewed horizontally.

All objects that sink in water displace their own volume of water.
The volume of an irregularly shaped object can be found from the change in the height of liquid in a measuring cylinder when it is immersed.
Density is the ratio of mass to volume for a substance: p = m/v.
The density of water is 1000 kg/m3 or 1.0 g/cm3.

Anything less dense than water will float in water, and anything denser than water will sink.
Ice floats because it is less dense than water.
One liquid will float on top of another liquid if it is less dense.

Time can be measured using a clock or watch.
Analogue clocks have hands and can only measure time to the nearest second.
Digital clocks display numbers and record time to a precision of at least one hundredth of a second.