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3 years ago

What is the difference between mass density and weight density?

Physics

1 answer:

Brut [27]3 years ago

8 0

Mass= amount of matter

Weight=the amount of gravity exerted

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The radius of Saturn is about 10 times the radius of Venus and the mass is about 100 times that of Venus. How much larger is the

lora16 [44]

let the mass of Venus is M then mass of Saturn is 100 M

similarly if the radius of Venus is R then the radius of Saturn is 10 R

now the force of gravity on a man of mass "m" at the surface of Venus is given by

$F_1 = \frac{GMm}{R^2}$

now similarly the gravitational force on the man if he is at the surface of Saturn

$F_2 = \frac{G*100M*m}{(10R)^2}$

$F_2 = \frac{GMm}{R^2}$

so here if we divide the two forces

$\frac{F_1}{F_2} = 1$

so here we can say

F1 = F2

so on both planets the gravitational force will be same

7 0

2 years ago

Why does convection occur only in fluids?

irinina [24]

Because the particles of a solid are not free to move,
no matter how hot and buoyant they become.

3 0

3 years ago

While studying bacterial cells, scientists measure the lengths of the cells in one colony. The chart shows their data.

Hitman42 [59]

The scientists should best deal with this measurement by stating that there was an error during measuring and collect further data.

5 0

2 years ago

Read 2 more answers

A machine part has the shape of a solid uniform sphere of mass 245 g and diameter 4.30 cm . It is spinning about a frictionless

Alla [95]

Answer:

Angular acceleration, $\alpha =9.49\ rad/s^2$

Explanation:

It is given that,

Mass of the solid sphere, m = 245 g = 0.245 kg

Diameter of the sphere, d = 4.3 cm = 0.043 m

Radius, r = 0.0215 m

Force acting at a point, F = 0.02 N

Let $\alpha$ is its angular acceleration. The relation between the angular acceleration and the torque is given by :

$\tau=I\times \alpha$

I is the moment of inertia of the solid sphere

For a solid sphere, $I=\dfrac{2}{5}mr^2$

$\alpha =\dfrac{\tau}{I}$

$\alpha =\dfrac{F.r}{(2/5)mr^2}$

$\alpha =\dfrac{5F}{2mr}$

$\alpha =\dfrac{5\times 0.02}{2\times 0.245\times 0.0215}$

$\alpha =9.49\ rad/s^2$

So, its angular acceleration is $9.49\ rad/s^2$ . Hence, this is the required solution.

3 0

3 years ago

An object with more mass has more kinetic energy than an object with less

Ber [7]

Explanation:

The kinetic energy of an object is given in terms of its mass and object as :

$K=\dfrac{1}{2}mv^2$

An object with more mass has more kinetic energy. An object with less mass, if both objects are moving at the same speed, in opposite directions, will have less kinetic energy. The square of v will give positive number.

4 0

2 years ago