87 Answered Questions for the topic Density

03/18/19

#### Let f(x) = k(9x − x^2) if 0 ≤ x ≤ 9

Let f(x) = k(9x − x2) if 0 ≤ x ≤ 9 and f(x) = 0 if x < 0 or x > 9.(a) For what value of k is f a probability density function? k= ?(b) For that value of k, find P(X > 1). P(X > 1) =... more

03/18/19

#### A milk truck carries milk with density 64.6

A milk truck carries milk with density 64.6 lb/ft^(3) lb/ft3 in a horizontal cylindrical tank with diameter 6 ft.(a) Find the force exerted by the milk on one end of the tank when the tank is full.... more
Density

10/07/18

#### Working out density of liquid c

Liquid A has a density of 0.7g/cm^3.Liquid B has a density of 1.6g/cm^3. 140 g of liquid A and 128g of liquid B are mixed to make liquid C. What is the density of liquid C?
Density

10/01/18

#### A certain liquid has a density of 0.70g/m. Find the mass of 6.4l of this liquid

What is the mass of 6.4 of this liquid
Density

09/16/18

#### if ethanol has a density of 0.785g/cm3, calculate the volume of 82.5g of ethanol

if ethanol has a density of 0.785g/cm3, calculate the volume of 82.5g of ethanol
Density Volume Length Height

08/27/18

#### How do I find the length with the given density, mass, width and a height?

Okay so the problem is:   Platinum has a density of 21.4 grams per cubic centimeter. A bar of platinum has a mass of about 1000 grams. It has a width of 51 millimeters and a height of 9.7... more
Density

06/20/18

#### calculate weight

A stone of mass 3kg and density 2gcm-3 is suspended by a spring from a spring balance. the stone is completely submerged in a liquid of density 1.3gcm-3. calculate the weight that the balance reads... more
Density

06/19/18

#### Density g/cm cubed

An object weighing 9.6 g is placed in a graduated cylinder displacing the volume from 10.0 mL to 13.2 mL. What is it’s density in g/ cm cubed?
Density

06/18/18

#### Determine the mass of instrument

A balloon used to carry instrument for meteorogical department up into the atmosphere has a capacity of 30m3 and is filledd with hydrogen. the total mass of balloon and hydrogen is 3kg. Determine... more
Density

06/18/18

#### calculate the density of the wood

A bar of brass of mass 180g and density 8.5gm-3 is attached to a piece of wood of mass 70g and both are totally immersed in water. the apparent mass is 120g. Calculate the density of the wood
Density

06/12/18

#### Calculate the height of the mountain

The pressure at the base of a mountain is 76cm of mercury and at the top it is 65cm of mercury. Calculate the height of the mountain given that the density of air is 1.25kgm-3 and that of mercury... more
Density

06/12/18

#### find the mass of gold contained in the crown

find the mass of gold contained in the crown, if the crown made of an alloy of gold and silver has a volume 60 centimeter cubic and mass of 1.05kg, and the density of gold is 19.3g/centimeter cubic... more

03/26/18

#### Maximum yield

An apple orchard has an average yield of 32 bushels of apples per tree if tree density is 22 trees per acre. For each unit increase in tree density, the yield decreases by 2 bushels per tree. How... more

01/30/18

#### Calculate the Partial pressure of each gas at STP, and calculate the density at STP.

At STP, air can be considered to be a mixture of ideal gases: 21.1% O<sub>2</sub>, 78.0% N<sub>2</sub> and 1.00% Ar by volume.   a) Calculate the partial pressure of each... more
Density

01/19/18

#### What is the density of an object?

An object with a mass of 10 g and a volume of 5 cm3 was placed into a container of water.
Density

01/12/18

#### a light alloy consists of 70 percent aluminium and 30 percent magnesium by mass calculate density of the alloy given thet density of aluminium is 2700 kilograms

per metre cubed and density of magnesium is 1740 kilograms per metre cubed

12/10/17

#### Can you help me find a counterexample to the following;

For a subset x⊆R: 'X is dense in R implies that x∩Q≠Ø
Density

11/29/17

#### A chef fills a 50ml container with 43.5g of cooking oil. What is the density of the oil

What is the density of the oil and how do you find it.
Density

11/13/17

#### How to calculate the density of the ring? ( given in g/cm 3 )

A ring has a mass of 38.6 and volume of 2       3 cm.

11/09/17

#### PLEASE TELL ME HOW TO WORK IT OUT, DON'T TELL ME THE ANSWER,THANK YOU!

If you dissolve 300 g of salt in 10 litres of water, what is the density of that solution of salty water? In this particular example, assume that the total volume doesn’t change when salt is added... more
Density

10/10/17

#### Finding density

A block of lead has dimensions of 4.5 cm by 5.2 cm by 6.0 cm. The block has a mass of 1587 g. Calculate the density of lead.
Density Mass

09/13/17

#### What is the mass of 15.0 cm3 of iron?

The density of iron is 7.86 g/cm3.  What is the mass of 15.0 cm3 of iron?

05/05/17

#### Alloy Question

An alloy is made from a mixture of gold and silver. The density of gold is 19.3 g/cm^3. The density of silver is 10.5g/cm^3. A ring is made from the alloy. The mass of the ring is 10g and its... more
Density

04/25/17

#### A measure of how much substance is packed into a space

What is density ? What is mass divided by vol? What is water ? What is element?

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