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3 years ago

An IGCSE student thinks it may be possible to identify different rocks (A, B and C) by measuring their

Physics

1 answer:

kherson [118]3 years ago

8 0

Answer:

See the answer below

Explanation:

a. The volume in the first measuring cylinder reads 70 $cm^3$ while that of the second reads 95 $cm^3$ . Hence;

V1 = 70 $cm^3$

V2 = 95 $cm^3$

b. An object will always displace its own volume in a liquid. Hence:

Volume V of the rock sample = V2 - V1

= 95 - 70 = 25 $cm^3$

c. Mass of A = 102 g

Volume of A = 25 $cm^3$

Density = mass/volume

Hence, density of A = 102/25 = 4.08 g/ $cm^3$

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Any fracture or system of fractures along which Earth moves is known as a

Alexxx [7]

Any fracture or system of fractures along which Earth moves is known as a fault.

Answer: b. fault.

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3 years ago

Which of the following represents a covalent compound? a. BeF2 b. KF C. PCIE d. Ti

grin007 [14]

KF is the covalent compound

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3 years ago

A car with speed v and an identical car with speed 2v both travel the same circular section of an unbanked road. If the friction

yawa3891 [41]

Answer:

$F'=\dfrac{F}{4}$

Explanation:

Let m is the mass of both cars. The first car is moving with speed v and the other car is moving with speed 2v. The only force acting on both cars is the centripetal force.

For faster car on the road,

$F=\dfrac{mv^2}{r}$

v = 2v

$F=\dfrac{m(2v)^2}{r}$

$F=4\dfrac{m(v)^2}{r}$ ..........(1)

For the slower car on the road,

$F'=\dfrac{mv^2}{r}$ ............(2)

Equation (1) becomes,

$F=4F'$

$F'=\dfrac{F}{4}$

So, the frictional force required to keep the slower car on the road without skidding is one fourth of the faster car.

8 0

4 years ago

What is it that lives if it is fed, and dies if you give it a drink?

Anna71 [15]

Fire is it that lives if it is fed, and dies if you give it a drink.

<h3>Explanation:</h3>

Fire is very essential part of human life. It is used for cooking food and for other important activities. Without fire we cannot not survive. Something or the other should be heated before consumption and this can be achieved only with fir. It is also used in the darker places for viewing many things around us.

Thus, fire can survive if we give fuel or any wooden pieces and when water is poured on it it will turn off. Hence Fire is the one that survives when it is fed and dies when water is given as a drink to it.

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3 years ago

The magnet below is cut in half. what will be the result?

loris [4]

Answer:

the correct would be c

Explanation:

a magnet will always have a north and a south so if you cut the magnet in half the north part would have a south on the opposite end and vice versa .

3 0

3 years ago