Numerical Problems | Chapter 7 | Density & Temperature | 9th Physics | National Book Foundation

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Two liquids A and B, have densities 1g/mL and 1.2g/mL respectively. When both liquids are poured into a container, one liquid floats on top of the other. Which liquid is on top, and why?
Write a method to find the volume and density of a human body?
How is plasma the fourth state of matter? Give a reason.
Why water is not used in liquid in glass thermometers?
Can we increase internal energy of a substance without increasing its temperature?
Why are fixed point scales required for thermometers? What difficulties are there when setting fixed points for thermometer scales?
Mercury is replaced with alcohol in liquid in glass thermometers. Discuss the possible change in sensitivity and range of thermometer?
Why -273.15℃ temperature is called absolute zero? Can we achieve this temperature?
Why thermocouple thermometer is suitable to measure high temperatures but not liquid in glass thermometer? Why is a thermocouple thermometer good for measuring high temperatures but a liquid in glass thermometer is not?
Can we increase the sensitivity of a liquid in glass thermometer without changing its range?
One student claims to have constructed a more sensitive liquid in glass thermometer. How can her claim be verified?
Sarah has two objects, a wooden block and a metal ball, with the following properties:
(a) The wooden block has a mass of 300g and a volume of 150〖cm〗^3.
(b) The metal ball has a mass of 500g and a volume of 50〖cm〗^3.
Calculate the density of each object and determine which one is denser.
You have a container with 500 milliliters of cooking oil, and it has a mass of 450 grams. Calculate the density of the cooking oil in grams per milliliter (g/mL).
A 70cm 10cm 30cm plastic box has mass of 2500g. Find the density of plastic.
Aluminum has a density of 2700kgm^(-3). Find the mass of a solid 25cm diameter aluminum ball.
A cube of iron has a side length of 10cm. What is volume of this cube? Mass of this iron cube is half kilogram. This cube has cavity inside it, find the volume of the cavity?
Mass of irregular shaped stone is 200grams (g). When it is lowered in a measuring cylinder, it rises the water level from 40mL to 73mL. Find volume and density of this stone.
7.1 You find a material in the shape of cube of side length 5 centimeter. Mass of this cube is 500 grams. Find the density of this material?
7.2 Mass of empty measuring cylinder is 145g. We add a 60mL liquid in it. Now, its mass become 205g. Find density of the liquid.
7.3 Find the density of mass 3.30kg as shown in the figure.
7.4 Mass of a rock is 80.52grams. It was immersed in a measuring cylinder containing water. From the figure, find the initial and final volume of water. Use this data to find volume of water and density.

[yours-hw]

A/S sir if you also share pdf notes kindly share the link with me as well
Thankyou ~

[Bintehawaworld]

Aoa
Sir conceptual questions kab tak share hon gy ?

[obsessedbynature]

Sir question 1 ma gram ma convert Karne ka Liye to 1000 se multiply karien gy or us sa answer galat arha

[AIMSonline-demm]

Sir btw Q3 ka answer me aap ne calculate shi Ni Kia.
Agar aap ne jese Kia h use Dekha Jaye to answer 1.25x10-⁷ h.
But aap ka 0.125 h.


Btw thx 😊.

[amajeed]

Janab Q3 mae kg/m^3 ko g/cm^3 mae aap ne wrong convert kiya hy. 125×1000 = ho ga .125 g/cm^3. Please check your Q1 And Q3. Thanks

[mharis]

Answer o Numerical no 3 is 0.12 g/ cm cube not negative cube please check

[MaryamZaheer-rczz]

Sir yai q 5 ka ans wrong ha plz check your ans book mai 935.9cm3 ha

[AhmadMustafa-nc]

Q 4 ka answer calculate kary wrong araha ha plz check kr k bataye

[hinazjdidoflvgpooiufrglcoc]

Answer for Q3 (according to book)
25cm=25/100=1/4m
Radius=diameter/2=1/4 /2
=1/8m
Volume of cube=4/3x3.1416x(1/8)'3
=8.18125x10'-3
VxP=M
8.18125x10'-3x2700=M
M=22.08=22(round off)

[kazmiproduction]

Sar please long response questions k answers send Karen plz😢

[laibarani-ihrh]

Sir apki videos bht achi bni hoti ha
M ny pehly b ap sy iska method pocha tha kindly aj bta den
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