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Lady bird [3.3K]

2 years ago

10

How can we predict how high a roller coaster can go knowing its velocity?

1 answer:

KatRina [158]2 years ago

6 0

“to predict the speed that a coaster will reach before it is ever placed on the track. ... When coaster goes up by height h then its gravitational potential energy increases by the amount m.g.h where m = mass of coaster, h = height of coaster and g = gravitational acceleration due to Earth”

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guajiro [1.7K]

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d . A stream of particles

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All of the members of a community belong to the same species tf

Anna35 [415]

That is false

I hope this helps!

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2 years ago

A wave seen at the ocean’s shore is which kind of wave?

Lostsunrise [7]

B. Transverse Wave this is the correct answer

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A gram molecule of a gas at 127 ° expands isothermally until its volume id doubled. find the amount of work done and heat absorb

Nadusha1986 [10]

A gram molecule<span> of a </span>gas<span> at </span>127<span>°C </span>expands isothermally until its volume<span> is </span>doubled<span>. </span>Find<span> the </span>amount<span>of </span>work done<span> and </span>heat absorbed<span>.</span>

3 0

3 years ago

A 6.75 nC charge is located 1.99 m from a 4.46 nC point charge.

sladkih [1.3K]

Explanation:

Given that,

Charge 1, $q_1=6.75\ nC=6.75 \times 10^{-9}\ C$

Charge 2, $q_2=4.46\ nC=4.46\times 10^{-9}\ C$

The distance between charges, r = 1.99 m

To find,

The electrostatic force and its nature

Solution,

(a) The electric force between two charges is given by :

$F=\dfrac{kq_1q_2}{r^2}$

$F=\dfrac{9\times 10^9\times 6.75\times 10^{-9}\times 4.46\times 10^{-9}}{(1.99)^2}$

$F=6.84\times 10^{-8}\ N$

(b) As the magnitude of both charges is positive, then the force between charges will be repulsive.

Therefore, this is the required solution.

5 0

3 years ago