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3 years ago

A person on a merry-go-round is constantly accelerating away from the center?true or false

Physics

2 answers:

netineya [11]3 years ago

7 0

Answer:

False

Explanation:

Lemme know if you need an explanation! :))

Alisiya [41]3 years ago

4 0

That statement is false. It's exactly the opposite direction.

In circular motion, the "centripetal" force ... and therefore the centripetal acceleration ... points TOWARD the center.

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(a) What is the potential between two points situated 10 cm and 20 cm from a 3.0-μC point charge? (b) To what location should th

julia-pushkina [17]

Answer:

(a) 135 kV

(b) The charge chould be moved to infinity

Explanation:

(a)

The potential at a distance of <em>r</em> from a point charge, <em>Q</em>, is given by

$V = -\dfrac{kQ}{r}$

where $k = 9\times 10^9 \text{ F/m}$

Difference in potential between the points is

$kQ\left[-\dfrac{1}{0.2\text{ m}} -\left( -\dfrac{1}{0.1\text{ m}}\right)\right] = \dfrac{kQ}{0.2\text{ m}} = \dfrac{9\times10^9\text{ F/m}\times3\times10^{-6}\text{ C}}{0.2\text{ m}}$

$PD = 135\times 10^3\text{ V} = 135\text{ kV}$

(b)

If this potential difference is increased by a factor of 2, then the new pd = 135 kV × 2 = 270 kV. Let the distance of the new location be <em>x</em>.

$270\times10^3 = kQ\left[-\dfrac{1}{x}-\left(-\dfrac{1}{0.1\text{ m}}\right)\right]$

$10 - \dfrac{1}{x} = \dfrac{270000}{9\times10^9\times3\times10^{-6}} = 10$

$\dfrac{1}{x} = 0$

$x = \infty$

The charge chould be moved to infinity

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3 years ago

Dense water near the poles sinks, creating a current towards the equator. What would you expect to happen to this current if tem

Rudik [331]

It's not c or d :/!!!!!

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3 years ago

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umka2103 [35]

Answer:

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3 years ago

1.Suppose someone pulls a cart up a ramp a distance of 85cm along the ramp with a force of 15N.

Drupady [299]

1. 12.75 J

Assuming that the force applied is parallel to the ramp, so it is parallel to the displacement of the cart, the work done by the force is

$W=Fd$

where

F = 15 N is the magnitude of the force

d = 85 cm = 0.85 m is the displacement of the cart

Substituting in the formula, we get

$W=(15 N)(0.85 m)=12.75 J$

2. 10.6 N

In this part, the cart reaches the same vertical height as in part A. This means that the same work has been done (because the work done is equal to the gain in gravitational potential energy of the object: but if the vertical height reached is the same, then the gain in gravitational potential energy is the same, so the work done must be the same).

Therefore, the work done is

$W=Fd=12.75 J$

However, in this case the displacement is

d = 120 cm = 1.20 m

Therefore, the magnitude of the force in this case is

$F=\frac{W}{d}=\frac{12.75 J}{1.20 m}=10.6 N$

3 0

2 years ago

If a person chips off a piece of this block that has a mass of 26.3 g, what will the density be of the piece? What will the dens

solmaris [256]

The density of the two pieces of rock is determined from the ratio of their masses to the pore volume of the rock.

<h3>What is density?</h3>

The density of an object is the ratio of mass to volume of the object.

Density = mass/volume

Assuming a constant pore volume of the rock = V

Density for 26.3 g = 26.3/V

Density for 58.3 g = 58.3g/V

Thus, the density of the two pieces of rock is determined from the ratio of their masses to the pore volume of the rock.

Learn more about density here: brainly.com/question/6838128

#SPJ1

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2 years ago

A person on a merry-go-round is constantly accelerating away from the center?true or false ​

A person on a merry-go-round is constantly accelerating away from the center?true or false