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ahrayia [7]
2 years ago
6

3/10

Physics
1 answer:
lyudmila [28]2 years ago
7 0

Answer:

4,800?

First I subtracted 8 from 24 because there are 24 hours in a day ad she spends 8 of those hours sleeping. I then took the answer which was 16, and multiplied that by 60 to find out how many minutes were in 16 hours and I got 960. I then multiplied 960 by 5 because she winks 5 times each minute. This left me with the answer 4,800.

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When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a
DochEvi [55]

A quick, easy way to decide whether there was a chemical change

is to look and see whether there are NEW substances after the

event, that weren't there when it started.


This particular scenario started out with fat and sodium hydroxide (lye).

And then, suddenly, POOF ! Soap and glycerin showed up. Where did

THOSE come from ? They came from the molecules in fat and lye,

getting broken up and recombined to make different substances.

THAT's exactly a chemical change.

6 0
3 years ago
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What is the gravitational potential energy of a 2.5kg object that is 300m above the surface of the earth? g=10m/s
Alexus [3.1K]

Answer:

7350 J

Explanation:

Gravitational Potential Energy: This is defined as the energy possessed by a body due to it's position in the gravitational field. The S.I unit is Joules(J).

Applying,

E.p = mgh..................... Equation 1

Where E.p = Gravitational potential Energy, m = mass of the object, h = height of the object above the surface of the earth, g = acceleration due to gravity.

Given: m = 2.5 kg, h = 300 m

Constant: g = 9.8 m/s²

Substitute these values into equation 1

E.p = 2.5(300)(9.8)

E.p = 7350 J.

4 0
3 years ago
In gym class you run 22 m horizontally, then climb a rope vertically for 6.2 m. What is the direction angle of your total displa
miskamm [114]
Im 99% sure
tan^-1 (6.2/22)= 15.7º
with 2 significant figures 16º
7 0
3 years ago
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A body builder exerts 15 N of force over 3 m. How much work did she do?
tangare [24]
Work done = force x distance

work done = 15 x 3

work done = 45J
4 0
2 years ago
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A 70 kg base runner begins his slide into second base while moving at a speed of 4.35 m/s. He slides so that his speed is zero j
sladkih [1.3K]

Answer

given,

Mass of the runner, M = 70 Kg

speed of the runner on the second base = 4.35 m/s

speed at the base = 0 m/s

Acceleration due to gravity,g = 9.8 m/s²

a) magnitude of mechanical energy lost

  Mechanical energy lost is equal top gain in kinetic energy

   ME_{Lost}=\dfrac{1}{2}mv^2

   ME_{Lost}=\dfrac{1}{2}\times 70\times 4.35^2

   ME_{Lost}=662.29\ J

b) Work done = Force x displacement

    W = F. x

     F = μ mg

    W = μ mg . x

Work done is equal to 662.29 J

  x=\dfrac{W}{\mu m g}

using the coefficient of the friction,μ = 0.7

  x=\dfrac{662.29}{ 0.7\times 70\times 9.8}

     x = 1.38 m

Hence, the runner will slide to 1.38 m.

3 0
2 years ago
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