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4 years ago

A hypothesis is an assumption or a best guess that

2 answers:

6 0

Definition: a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

Jet001 [13]4 years ago

5 0

A hypothesis is a scientific guess containing the words if, and then

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Steel wire rope is used to lift a heavy object. We use a 3.1m steel wire that

kaheart [24]

Answer:

Young's modulus for the rope material is 20.8 MPa.

Explanation:

The Young's modulus is given by:

$E = \frac{FL_{0}}{A\Delta L}$

Where:

F: is the force applied on the wire

L₀: is the initial length of the wire = 3.1 m

A: is the cross-section area of the wire

ΔL: is the change in the length = 0.17 m

The cross-section area of the wire is given by the area of a circle:

$A = \pi r^{2} = \pi (\frac{0.006 m}{2})^{2} = 2.83 \cdot 10^{-5} m^{2}$

Now we need to find the force applied on the wire. Since the wire is lifting an object, the force is equal to the tension of the wire as follows:

$F = T_{w} = W_{o}$

Where:

$T_{w}$ : is the tension of the wire

$W_{o}$ : is the weigh of the object = mg

m: is the mass of the object = 1700 kg

g: is the acceleration due to gravity = 9.81 m/s²

$F = mg = 1700 kg*9.81 m/s^{2} = 16677 N$

Hence, the Young's modulus is:

$E = \frac{16677 N*0.006 m}{2.83 \cdot 10^{-5} m^{2}*0.17 m} = 20.8 MPa$

Therefore, Young's modulus for the rope material is 20.8 MPa.

I hope it helps you!

7 0

3 years ago

What do you think happens to kinetic energy with potential energy being increased?

swat32

Answer:

If the kinetic energy increases, the potential energy decreases, and vice-versa.

Explanation:

The amount of change in kinetic energy is equal to the amount of change in potential energy.

8 0

2 years ago

QUESTION 1

frez [133]

Go90 day would work better if they could just pay ate a little bit more than we

4 0

3 years ago

Which method of heat transfer transmits heat from the lower layers of air to the upper layers of air as the lower layers of air

Pepsi [2]

Answer:

Convection

Explanation:

The method of heat transfer that allows heat to rise via vertical transport of heated part of a fluid (gas or liquid) and replace the fluid upper layers is called "convection"

6 0

3 years ago

Read 2 more answers

The masses of two heavenly bodies are 2×10‘16’ and 4×10 ‘22’ kg respectively and the distance between than is 30000km. find the

ycow [4]

$F = 5.93×10^{13}\:\text{N}$

Explanation:

Given:

$m_1= 2×10^{16}\:\text{kg}$

$m_2= 4×10^{22}\:\text{kg}$

$r = 30000\:\text{km} = 3×10^7\:\text{m}$

Using Newton's universal law of gravitation, we can write

$F = G\dfrac{m_1m_2}{r^2}$

$\:\:\:\:=(6.674×10^{-11}\:\text{N-m}^2\text{/kg}^2)\dfrac{(2×10^{16}\:\text{kg})(4×10^{22}\:\text{kg})}{(3×10^7\:\text{m})^2}$

$\:\:\:\:= 5.93×10^{13}\:\text{N}$

3 0

3 years ago