3 years ago

If density of an object is 3gcm-3, will it float or sink in water.

Physics

1 answer:

Tema [17]3 years ago

3 0

The density of water is about 1g/cm³. This object is more dense than water, so it will sink.

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Approximate the field by treating the disk as a +6.1 C point charge at a distance of 21 cm Answer in units of N/C.

DaniilM [7]

Answer:

Electric field, $E=1.24\times 10^{12}\ N/C$

Explanation:

It is given that,

Charge, Q = +6.1 C

Distance, r = 21 cm = 0.21 m

We need to find the electric field. It is given by :

$E=k\dfrac{Q}{r^2}$

$E=9\times 10^9\times \dfrac{6.1}{(0.21)^2}$

$E=1.24\times 10^{12}\ N/C$

So, the electric field at this distance is $1.24\times 10^{12}\ N/C$ . Hence, this is the required solution.

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3 years ago

A psychopathologist records the number of criminal offenses among teenage drug users in a nationwide sample of 1,201 participant

lara [203]

Answer:

Standard deviation = 3

Explanation:

Given

$N = 1201$

$SS = 10800$

Required

Determine the standard deviation

First, we need to determine the variance;

$Variance = \frac{SS}{N - 1}$

This gives:

$Variance = \frac{10800}{1201 - 1}$

$Variance = \frac{10800}{1200}$

$Variance = 9$

Know that:

$Variance = SD^2$

Where SD represents standard deviation

This gives

$9 = SD^2$

Take square root

$SD = \sqrt 9$

$SD = 3$

7 0

3 years ago

You have What needs to be done to this circuit so that the light bulb lights up?

Fynjy0 [20]

Close the switch would be the correct answer

6 0

3 years ago

In 4 -5 sentences, summarize the science of the sport of curling and how it relates to friction

zalisa [80]

Well, a curler uses heat to calm down friction so I am not sure

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3 years ago

A book is sliding along a desk top. Because the book is in motion ,you know that the forces acting on the book are A. Balanced B

Virty [35]

Just because the book is moving doesn't tell you anything about the forces on it, or even whether there ARE any.

Just look at Newton's first law of motion, and this time, let's try and THINK about it too. It says something to the effect that any object continues in constant, uniform MOTION ..... UNLESS acted on by an external force.

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3 years ago