As the mechanical advantage increases what happens to the length of the string you have to pull to raise the block?

Answers

Answer 1

Answer: the string will tighten up to move the block

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A periodic wave is produced by a vibratingtuning fork. The amplitude of the wave would be
greater if the tuning fork were
(1) struck more softly
(2) struck harder
(3) replaced by a lower frequency tuning fork
(4) replaced by a higher frequency tuning fork

Answers

The amplitude of the wave would be greater if the tuning fork were "struck harder" since this would make for a louder noise, which happens from higher amplitudes.

Heat is a transfer of thermal energy from one object to anther because of a difference in?

Answers

Because of a difference in temperature.

temperature is the answer

Lamar Gant, U.S. powerlifting star, became the first man to deadlift five times his own body weight in 1985. Deadlifting involves raising a loaded barbell from the floor to a position above the head with outstretched arms. Determine the work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground (W=Fd).a. 270 J
b. 2646 J
c. 333 J
d. 3.00X10-3 J

Answers

The work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground is 2646 Joules

Work is the amount of energy exerted in other to perform an activity. Work is the product of force and displacement. It is given by:

Work = force * displacement

Given that the mass = 300 kg, height = 0.9 m, acceleration due to gravity (g) = 9.81 m/s². Hence:

Work = mass * acceleration due to gravity * height

Work = 300 * 9.81 * 0.9 = 2646 Joules

The work done by Lamar in deadlifting 300 kg to a height of 0.90 m above the ground is 2646 Joules

Find out more at: brainly.com/question/22599382

Answer:

(b) 2646 J

Explanation:

Earth's gravitational field exerts gravitational force that has direction towards the center of earth, we know that where there is force there is work.

Work by definition is given by.

$W = F.d$ here in this case $F$ is force because of gravity which has the magnitude of $F_(g) =mg$ .

We are making an assumption that we are not too high to change the value of $g.$

And $d = h = 0.9m$ .

Putting or substituting these values in the equation of work that i introduced above gives.

$W = mgh = 300kg*9.8*0.9m=2646J$

and it is Option (b).

Note! units will always be joules for work, joule by definition is Nm.

and $g =9.8m/s^2$ .

An object weighs 60.0 kg on the surface of the earth. How much does it weigh 4R from the surface? (5R from the center)

Answers

"60 kg" is not a weight. It's a mass, and it's always the same
no matter where the object goes.

The weight of the object is

   (mass) x (gravity in the place where the object is) .

On the surface of the Earth,

   Weight = (60 kg) x (9.8 m/s²)

      =    588 Newtons.

Now, the force of gravity varies as the inverse of the square of the distance from the center of the Earth.
On the surface, the distance from the center of the Earth is 1R.
So if you move out to 5R from the center, the gravity out there is

(1R/5R)² = (1/5)² = 1/25 = 0.04 of its value on the surface.

The object's weight would also be 0.04 of its weight on the surface.

   (0.04) x (588 Newtons) = 23.52 Newtons.

Again, the object's mass is still 60 kg out there.
___________________________________________

If you have a textbook, or handout material, or a lesson DVD,
or a teacher, or an on-line unit, that says the object "weighs"
60 kilograms, then you should be raising a holy stink.
You are being planted with sloppy, inaccurate, misleading
information, and it's going to be YOUR problem to UN-learn it later.
They owe you better material.

Answer:

23.5 N

Explanation:

Just wanted to clarify something about the verified answer: Our only given measurement—the mass of the object—has 3 significant digits, so we can only include 3 significant digits in our answer.

23.52 N is NOT the correct answer. Your answer should only have 3 significant digits.

I just did the quiz where this problem came from, so I know that 23.5 N is the correct answer.

If a wave has a frequency of 2 Hz. what is the period

Answers

The period is the reciprocal of the frequency ... ' 1 ' divided by it.

P = 1/f = 1 / (2 per second) = 1/2 second

Why is gas able to flow? a its particles have melted and can move around b its particles have high viscosity and can move around c its particles have enough energy to move around d its particles have enough pressure to move around 3. which of the following is true about the viscosity of liquids? a liquids with high viscosity do not flow as well as liquids with low viscosity b liquids with high viscosity flow better than liquids with low viscosity c liquids with high viscosity do not resist flow any more than liquids with low viscosity d water is a good example of a liquid with high viscosity 4.in a(n_____, the particles form a regular, repeating pattern please help!?

Answers

The answer to why is gas able to flow is answer c its particals have enough energy to move around.

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