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3 years ago

Billy jumps straight up with a positive velocity of 100 m/s. When Billy

Physics

1 answer:

ZanzabumX [31]3 years ago

7 0

Answer:......................................................................................

.Explanation:

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Galileo Galilei was the first scientist to perform experiments in order to test his ideas. He was also the first astronomer to s

nalin [4]

Answer:

A) jupiter has orbiting moons

Explanation:

Btw I'm not sure abt it

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3 years ago

If KE becomes less than IF, what phase change occurs?

netineya [11]

Answer: liquid to solid

Explanation: Kinetic energy is the energy possessed by an object by virtue of its motion.

Solid is the phase of matter where particles have strongest inter molecular forces and thus molecules posses no kinetic energy.

Liquid is the phase of matter where kinetic energy of the molecules is almost equal to the inter molecular forces.

Gas is the phase of matter where kinetic energy of the molecules is more than the inter molecular forces present among molecules and hence the molecules move randomly.

Thus the phase change is from liquid to solid.

8 0

3 years ago

Air resistance allow objects to develop full acceleration due to gravity true or false

Aloiza [94]

False. because the object cannot freefall due to resistance, so it cannot develop full acceleration.

3 0

3 years ago

A 259-kV power transmission line carrying 429 A is hung from grounded metal towers by ceramic insulators, each having a 0.71×109

ella [17]

Answer:

The resistance is $7.47\times10^{6}\ \Omega$ .

Explanation:

Given that,

Power = 259 kV

Current = 429 A

Resistance $R=0.71\times10^{9}\ Omega$

We need to calculate the current in each insulator

Using formula of current

$I=\dfrac{P}{R}$

Put the value into the formula

$I=\dfrac{259\times10^{3}}{0.71\times10^{9}}$

$I=3.64\times10^{-4}\ A$

So all 95 insulators are in parallel

We need to calculate the resistance

Using formula of resistance

$\dfrac{1}{R}=\sum_{i=1}^{95}\dfrac{1}{R_{i}}$

Put the value into the formula

$\dfrac{1}{R}=\dfrac{95}{0.71\times10^{9}}$

$\dfrac{1}{R}=1.338\times10^{-7}$

$R=\dfrac{1}{1.338\times10^{-7}}$

$R=7473841.5=7.47\times10^{6}\ \Omega$

Hence, The resistance is $7.47\times10^{6}\ \Omega$ .

8 0

4 years ago

This question is select two answers, but I don't understand why A is wrong.

ElenaW [278]

Explanation:

The blocks are spinning around the center of mass, but they're also sliding horizontally. So they still have a positive displacement.

3 0

3 years ago