Make m the subject of the following equation e=mgh

The Achilles tendon connects the muscles in your calf to the back of your foot. When you are sprinting, your Achilles tendon alt

Andrews [41]

Explanation:

It is given that,

Mass of the runner, m = 70 kg

Length of the tendon, l = 15 cm = 0.15 m

Area of cross section, $A=110\ mm^2=0.00011\ m^2$

Part A,

Let the runner's Achilles tendon stretch if the force on it is 8.0 times his weight, F = 8 mg

Young's modulus for tendon is, $Y=0.15\times 10^{10}\ N/m^2$

The formula of the Young modulus is given by :

$Y=\dfrac{F/A}{\dfrac{\Delta L}{L}}$

$0.15\times 10^{10}=\dfrac{8\times 70\times 9.8/0.00011}{\dfrac{\Delta L}{0.15}}$

$\Delta L=0.0049\ m$

Part B,

The fraction of the tendon's length does this correspond is given by :

$\dfrac{\Delta L}{L}=\dfrac{0.0049}{0.15}$

$\dfrac{\Delta L}{L}=0.0326$

Hence, this is the required solution.

6 0

3 years ago

A hummingbird flies 1.2 m along a straight path at a height of 3.4 m above the ground. Upon spotting a flower below, the humming

Viefleur [7K]

Answer:1.84

Explanation:

Given

Humming bird travels 1.2 m along a straight line at height of 3.4 m

Now bird drops 1.4 m to hover in front of the flower

So bird net displacement is

displacement $=\sqrt{1.2^2+1.4^2}$

displacement $=\sqrt{3.4}$

=1.84

7 0

3 years ago

How does mass affect the change in velocity of an object? Immersive Reader

Bas_tet [7]

Answer:

I would say the 3rd one

Explanation:

5 0

3 years ago

Angling of the focal track of the anode to create a large actual focal spot and a smaller effective focal spot describes (the):

Vsevolod [243]

Angling of the focal track of the anode to create a large actual focal spot and a smaller effective focal spot describes the line focus principle

<h3>What is the line focus principle?</h3>

The line focus principle states that as the anode angle is reduced, the actual focal spot also becomes small but the heat loading is increased.

It also explains the relationship between the anode surface and the effective focal spot size.

As a result of this, by angling the target, effective area of the target is made much smaller that the actual area of electron interaction.

Hence, angling of the focal track of the anode to create a large actual focal spot and a smaller effective focal spot describes the line focus principle.

Learn more about line focus principle here:

#SPJ1

3 0

2 years ago

Describe why chemical bonding occurs. Give two examples of how<br> bonds can form.

Vladimir [108]

Explanation:

Chemical bonding results from attractive forces that joins chemical species.

Noble gases show no tendency to combine with themselves or with other kinds of atoms because of their completely filled outer energy levels.
The driving force for most interatomic bonding is the tendency to have completely filled outer energy levels just like the inert gases.
The stable configuration can be attained by losing or gaining of electrons or sharing of pairs of electrons.

Two examples of how bonds form:

Bonds can be formed by:

Losing and gaining of electrons to form electrovalent or ionic bonds.
Sharing of electrons to form covalent bonds.

Learn more:

Ionic bonds brainly.com/question/6071838

#learnwithBrainly

6 0

3 years ago