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Viktor [21]
3 years ago
11

write at least 5 sentences answering the question, "How does the height of a ramp affect the speed of an object rolling down tha

t ramp?"
Physics
1 answer:
Salsk061 [2.6K]3 years ago
7 0

Answer:

i dont care bout nunnadt shi

Explanation:

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The battery capacity of a lithium ion battery in a digital music player is 750 mA-h. The manufacturer claims that the player can
Oksi-84 [34.3K]

Answer:

The number of electrons is 6.3\times10^{21}\ electrons

(D) is correct option.

Explanation:

Given that,

Battery capacity = 750 mA-h

Time t= 8 hours

Time t'=3 hours

We need to calculate the battery capacity

Battery\ capacity=750\times10^{-3}\times3600

Battery\ capacity=2700\ A-s

We need to calculate the number of electrons in 1 C Li

Using formula for number of electron

n=\dfrac{1}{e}

n=\dfrac{1}{1.6\times10^{-19}}

n=6.25\times10^{18}\ electrons

We need to calculate the number of electron in 2700 C

2700\ C=2700\times6.25\times10^{18}=1.68\times10^{22}\ electrons

The total number of electrons battery can deliver in 8 hours

n=1.68\times10^{22}\ electrons

We need to calculate the number of electron in 3 hours

Using formula of number of electrons

n=\dfrac{n\times t'}{t}

Put the value into the formula

n=\dfrac{1.68\times10^{22}\times3}{8}

n=6.3\times10^{21}\ electrons

Hence, The number of electrons is 6.3\times10^{21}\ electrons

8 0
4 years ago
Read 2 more answers
you are the person in charge of building a nuclear power plant in florida. your first choice is to select a
sammy [17]

Answer: you are the person in charge of building a nuclear power plant in Florida. your first choice is to select a site for building the power plant.

Explanation: To find the answer, we need to know more about the nuclear power plants and the criteria to select the site for power plant.

<h3>What you mean by nuclear power plants?</h3>
  • Nuclear power can be defined from the nuclear fission reaction.
  • These power plants will heat the water to produce steam and this steam is used to spin large turbines and thus generates electricity.
<h3>How to select the site for nuclear power plant?</h3>
  • We have to consider the following things,
  • keep distance from populated area.
  • distance from load center.
  • Accessibility to site.
  • Water availability and fuel availability.
  • waste disposal.

Thus, we can conclude that, before building a nuclear power plant, our first choice should be to select a site.

Learn more about the nuclear power plants and the criteria to select the site for power plant here:

brainly.com/question/28045272

#SPJ4

8 0
2 years ago
The current through a circuit is 0.05 Amps. How many Coulombs of charge pass
Mazyrski [523]

The answer to this question is:

Simply it can be calculate using the equation Q=It, here Q is the charge in coulombs , I current in Amps and t is the time in seconds.

so the answer is Q = 10*60 = 600 coulomb.

5 0
3 years ago
Most grandfather clocks have pendulums with adjustable lengths. One such clock gains 10 min per day when the length of its pendu
7nadin3 [17]

The length to which the pendulum will be adjusted to keep perfect time is 29.59 inches. See the explanation below.

<h3>What is the justification for the above answer?</h3>

T1 = 2πR√(L1/GM)

and

T2 = 2πR√(L1/GM)

T1/T2 = √(L1/L2).

If the pendulum has an efficient period, that means it executes with perfect frequency.

Thus,

T2 = (24 * 60)/x

= 1440/x

This means that in one day, there are perfect cycles of represented by "x". Note that there are 1440 minutes in one day.

If the other Pendulum is slower by 10 minutes, that means

T1 = 1450/x

Hence

(1450/x)/(1440/x) = √(L1/L2).

⇒ 1450/1440 = √(L1/L2).

Thus,

(1450/1440)² = 30/L

L = 30/(1450/1440)²

L = 30/(1.00694444444)²

L = 30/1.01393711419

L = 29.5876337695

L $\approx$ 29.59 inches.

Hence, the pendulum will need to be adjusted by 29.59 inches to ensure that the clock keeps perfect time.

Learn more about pendulum problems:

brainly.com/question/16617199

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3 0
2 years ago
What is a metric unit for energy?
Vilka [71]
Joule (J) is the metric unit for energy
8 0
3 years ago
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