Selina solutions

Selina solutions

Grade 8

Physical Quantities and Measurement | Numericals

Question 7

Q7) Calculate the volume of wood of mass 6000 kg if the density of wood is 0.8 g\ cm^{-3}

  • Solution

  • Transcript

Solution:

(a) Mass of wood = 150g

Volume of wood = 200cm³

Density = m/v

D = 150/200

D - 0.75 g/cm³

(b) Volume of wood = ?

Mass of wood = 6000kg

Density of wood = 0.8 g/cm³

D = 0.8g/cm³ = 0.8 x 1000 = 800kg/m³

D = m/v

So,

V = m/d

V = 6000/800

V = 7.5m³

"Hello, welcome to neeta question and answer video. Have a look at this question has a volume of 200 centimeter to find the density of wood in previous units and SI units. So serious and more centimeters. So let's start with the CGS unit. We all know that density is given as the density is equal to mass upon Warriors now over here the man It's give it as 150 done and I'm going to see The Nest 200 centimeter Cube. So let's just write this we get density is equal to 0.75 grams per centimeter cubed. So this will be the value in stages. So we get this at the CGS unit. Now, let's try to find out what will be the value in SI units. So let's try to find out the value in SI units. Now again, the same problem is believed that is density is equal to Mark upon volume. So therefore it is, it's t grin upon 200 centimeter Cube. Well, the thing is we have to change this Grand into kilograms and centimetres to millimetres to so the product we get the unit as case. So we know that 1000 gram is one kilogram. So 1 gram is 1 by 1000 kilogram. So 150 grams is E-150 by 1000 kilograms. Let's just cancel this ticket just came by hundred kg at the numerator here. So we get to swing by hundred over here. Let's talk about the centimeters. You probably know that one centimeter is equal to 1 by hundred meter 1 centimeters to will be 1 followed by a 1 by 1 divided by 600 meters. You put 200 centimeters Cube will be 200 by one college 160 meters cubed. Let's cancel to 0 from here. We get the value of 200 centimeters to apart or we can divide this as 1 by 1 or so. It'll be 2 pi 1 followed by 0 0 0 0 so when we scale this week 850 into 1000 upon 200. Let's cancel out the zeros from here. So this is 50. We get 15 to Caesar 750 kg per meter cube identity of the man of 150 exam in SI unit is 750 kg per meter cube. I have this was clear so we can also remember another formula if you all can remember this. So if you have to convert into exercise you can straight away take the CDC. 0.75 into X 5032 T SI unit. So the CGS unit in 2000 with you as I am. This is another shortcut for finding out the answer, but here we have understood the concept. So if you have any further queries, take place your comments below. Thank you. "

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your physics exam ?

Learn from an expert tutor.

Book a free class now
subject-cta

Question 7

Q7) Calculate the volume of wood of mass 6000 kg if the density of wood is 0.8 g\ cm^{-3}

  • Solution

  • Transcript

Solution:

(a) Mass of wood = 150g

Volume of wood = 200cm³

Density = m/v

D = 150/200

D - 0.75 g/cm³

(b) Volume of wood = ?

Mass of wood = 6000kg

Density of wood = 0.8 g/cm³

D = 0.8g/cm³ = 0.8 x 1000 = 800kg/m³

D = m/v

So,

V = m/d

V = 6000/800

V = 7.5m³

"Hello, welcome to neeta question and answer video. Have a look at this question has a volume of 200 centimeter to find the density of wood in previous units and SI units. So serious and more centimeters. So let's start with the CGS unit. We all know that density is given as the density is equal to mass upon Warriors now over here the man It's give it as 150 done and I'm going to see The Nest 200 centimeter Cube. So let's just write this we get density is equal to 0.75 grams per centimeter cubed. So this will be the value in stages. So we get this at the CGS unit. Now, let's try to find out what will be the value in SI units. So let's try to find out the value in SI units. Now again, the same problem is believed that is density is equal to Mark upon volume. So therefore it is, it's t grin upon 200 centimeter Cube. Well, the thing is we have to change this Grand into kilograms and centimetres to millimetres to so the product we get the unit as case. So we know that 1000 gram is one kilogram. So 1 gram is 1 by 1000 kilogram. So 150 grams is E-150 by 1000 kilograms. Let's just cancel this ticket just came by hundred kg at the numerator here. So we get to swing by hundred over here. Let's talk about the centimeters. You probably know that one centimeter is equal to 1 by hundred meter 1 centimeters to will be 1 followed by a 1 by 1 divided by 600 meters. You put 200 centimeters Cube will be 200 by one college 160 meters cubed. Let's cancel to 0 from here. We get the value of 200 centimeters to apart or we can divide this as 1 by 1 or so. It'll be 2 pi 1 followed by 0 0 0 0 so when we scale this week 850 into 1000 upon 200. Let's cancel out the zeros from here. So this is 50. We get 15 to Caesar 750 kg per meter cube identity of the man of 150 exam in SI unit is 750 kg per meter cube. I have this was clear so we can also remember another formula if you all can remember this. So if you have to convert into exercise you can straight away take the CDC. 0.75 into X 5032 T SI unit. So the CGS unit in 2000 with you as I am. This is another shortcut for finding out the answer, but here we have understood the concept. So if you have any further queries, take place your comments below. Thank you. "

Still have questions? Our expert teachers can help you out

Book a free class now

Want to top your physics exam ?

Learn from an expert tutor.

Book a free class now
subject-cta
linkedin instgram facebook youtube
2020 © Quality Tutorials Pvt Ltd All rights reserved
linkedin instgram facebook youtube