What is 0.4 ÷ 1.44 I don't understand it and I need help

A ball bearing has mass 0.44 pounds. 1 kg = 2.2 pounds. <br>

torisob [31]

Answer:

(i) 0.2 kg

(ii) kg/cm³

(b) 2.29 kg

Step-by-step explanation:

This problem gives you relations between units, and the formulas for density and mass. It is asking you to make use of these relations in various mass and density calculations.

The relationship between kg and pounds can be used to write a units conversion multiplier. It will have numerator equal to denominator, but will have units such that multiplying by it will give the units you want.

0.44 pounds × multiplier = __ kg

0.44 pounds × (1 kg)/(2.2 pounds) = (0.44/2.2)(1 kg)

0.44 pounds = 0.2 kg

__

The formula can be used to find the units of interest:

Density = mass/volume

units of density = (units of mass)/(units of volume)

units of density = kg/cm³

__

Using the given formula with the given value of L, we find the volume to be ...

V = 4(1.40 cm)(3 -1.40 cm)² = 14.336 cm³

Then the mass is ...

mass = volume × density

mass = (14.336 cm³)×(0.160 kg)/(1 cm³) = 2.29376 kg

The mass is about 2.29 kg.

_____

<em>Additional comment</em>

Often you will see density in terms of kg/m³ or g/cm³. Water has a density of about 1 g/cm³ or 1000 kg/m³. The most dense non-radioactive element in the periodic table is osmium, with a density of about 22.6 g/cm³, or 0.0226 kg/cm³. The material in part (b) of this problem has a density about 7 times that, so is clearly not from Earth.

7 0

2 years ago

Witch equation has the correct sign on the product.

maria [59]

Answer: choice A or (-25)(-25)=625

Step-by-step explanation:

its choice A because a negative times a negative equals a positive :)

4 0

3 years ago

Read 2 more answers

2. (01.07 MC)

Elena-2011 [213]

Part A: subtract 6 from both sides
Divide by -3 on both sides
X=-3
Part B: add like terms (-2K-3k)
Add 12 to both sides
Add 5k to both sides
Divide by 5 on both sides
K=3
Part C: distribute 6 into the parentheses
Add like terms together (36-5)
Subtract 1 from both sides
Subtract 36v from both sides
Divide by -30 on both sides
-1=v

7 0

3 years ago

What is this question

insens350 [35]

What question i cant see it ,is there a picture or something

3 0

3 years ago

At a recent track meet, the fastest time in the 40-yard dash was 4.37 seconds, and the slowest time was 5.08 seconds. What is th

Xelga [282]

all you have to do is subtract 4.37 from 5.08 which is 0.71 seconds

7 0

4 years ago

Read 2 more answers