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A solid weighs 200N in air, 150N in water and 170N in a liquid. Find relative density of solid, relative density of liquid and d

fomenos

Answer:

$\rho_{s} = 4$

$\rho_{l} = 0.6$

$\rho{liq} = 600 kg/m^{3}$

Given:

Weight of solid in air, $w_{sa} = 200 N$

Weight of solid in water, $w_{sw} = 150 N$

Weight of solid in liquid, $w_{sl} = 170 N$

Solution:

Calculation of:

1. Relative density of solid, $\rho_{s}$

$\rho_{s} = \frac{w_{sa}}{w_{sa} - w_{sw}}$

$\rho_{s} = \frac{200}{200 - 150} = 4$

2. Relative density of liquid, $\rho_{l}$

$\rho_{l} = \frac{w_{sa} - w_{sl}}{w_{sa} - w_{sw}}$

$\rho_{l} = \frac{200 - 170}{200 - 150} = 0.6$

3. Density of liquid in S.I units:

Also, we know:

$\rho{l} = \frac{\rho_{liq}}{\rho_{w}}$

where

$= {\rho_{liq}}$ = density of liquid

$= {\rho_{w}} = 1000 kg/m^{3}$ = density of water

Now, from the above formula:

$0.6 = \frac{\rho_{liq}}{1000}$

$\rho{liq} = 600 kg/m^{3}$

3 0

2 years ago

For lunch you and your friends decide to stop at the nearest deli and have a sandwich made fresh for you with 0.300 kg of Italia

Oliga [24]

Answer with Explanation:

We are given that

$m_1=0.3 kg$

$m_2=0.4 kg$

Spring constant, $k=200 N/m$

$h=0.250 m$

a.Speed of ham before collision

$u=\sqrt{2gh}=\sqrt{2\times 9.8\times 0.25}=2.2m/s$

Collision is inelastic

According to law of conservation of momentum

$m_1u_1=(m_1+m_2)v$

$0.3\times 2.2=(0.3+0.4)v$

$v=\frac{0.3\times 2.2}{0.7}=0.94 m/s$

Kinetic energy of masses=Spring potential energy at maximum distance

$\frac{1}{2}(m_1+m_2)v^2=\frac{1}{2}kA^2$

$A^2=\frac{(m_1+m_2)v^2}{k}$

$A=\sqrt{\frac{(m_1+m_2)v^2}{k}}$

Substitute the values

$A=\sqrt{\frac{(0.3+0.4)\times (0.94)^2}{200}}=0.056 m=0.056\times 100=5.6 cm$

1 m=100 cm

b.Time period, $T=2\pi\sqrt{\frac{(m_1+m_2)}{k}}$

$T=2\pi\sqrt{\frac{(0.3+0.4)}{200}}=0.37 s$

7 0

3 years ago

When particles spread out due to an increase of thermal energy this is called?

Lelechka [254]

This sounds like thermal expansion.

5 0

3 years ago

Please help

coldgirl [10]

Well, assuming that the world would break if we didnt have inertia, in baseball, when you tried to catch a ball you would probably go flying backwards until other things stopped you (friction etc). you also probably wouldnt be able to run without the earth going all out of its path around the earth. every step you would take would push the earth because there is no inertia to keep the earth at one point

5 0

3 years ago

An object is known to have balanced forces on it. Which of the following would be a true statement?

Montano1993 [528]

If an object has a balanced force on it, there is a possibility that the <u>object may be in a position</u> i.e. there is no change in speed and direction of the body.

If the forces acting on an object is balanced, it means that the net force acting on the body is zero.

According to Newton's law of motion, an object will continue in a state of motion in a straight line unless acted upon by an external force.

This external force might be a balanced or unbalanced force. Hence if an object has a balanced force on it, there is a possibility that the <u>object may be in a position</u> i.e. there is no change in speed and direction of the body.

Learn more here: brainly.com/question/20835245

5 0

2 years ago