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3 years ago

HELP ME PLSSSS!!!!!!!

Physics

2 answers:

Lemur [1.5K]3 years ago

8 0

Answer:B

Explanation: The answer explains it

DedPeter [7]3 years ago

4 0

Answer:

Explanation:

A. The molecules that make up olive oil are longer than those that

make up alcohol, so they have more resistance to sliding past one

another.

Olive oils are unsaturated fats with many carbons whereas, alcohols are typically short with very few carbons.

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How much heat is needed to boil 120 kg of water ?

nekit [7.7K]

Q = mc<span>∆t, where:
q = energy flow
m = mass, 120 000 g
c = specific heat capacity, 4.81 J/gC
</span><span>∆t = change in temperature, ~75 (100 - 25, which is room temperature)

Substituting in the values, we get:
q = 120000 x 4.81 x 75 = 43290000 Joules = 43.29 MJ

Hope I helped!! xx

</span>

7 0

3 years ago

Can fly but have no wings. I can cry but I have no eyes. Wherever I go, darkness follows me. What am I? I will give brainiest if

nalin [4]

Answer:

Clouds

Explanation:

Clouds float in the sky but do not have wings like a bird or plane.

Clouds drop rain, or "cry," but do not have eyes like an animal.

When clouds are overhead, they block the sun and thus create an area of darkness.

4 0

3 years ago

You want to calculate the area of your dorm

kicyunya [14]

Answer:

no I don't want too..

stay safe healthy and happy.

4 0

3 years ago

You go to an amusement park with your friend Betty, who wants to ride the 70-m-diameter Ferris wheel. She starts the ride at the

Ksenya-84 [330]

Answer:

Part a)

$d = 23.94 m$

Part b)

$\theta = 110 degree$

Explanation:

Part a)

As we know that initially the position vector is r

then the same magnitude position vector is rotated by 40 degree angle

so displacement magnitude is the magnitude of change in position vector

so it is given as

$d = \sqrt{r_1^2 + r_2^2 + 2r_1r_2cos(180-\theta)}$

$r_1 = r_2 = 35 m$

$d = \sqrt{35^2 + 35^2 -2(35)(35)cos40}$

$d = 23.94 m$

Part b)

now we need to find the direction of the displacement vector

so let say it makes an angle with x axis so we have

$tan\theta = \frac{rsin\phi}{r - rcos\phi}$

$tan\theta = \frac{sin 40}{1 - cos40}$

$\theta = 110 degree$

4 0

3 years ago

A criminal is escaping across a rooftop and runs off the roof horizontally at a speed of 5.0 m/s, hoping to land on the roof of

lisabon 2012 [21]

Answer:

D = 3.0 m

Explanation:

Assuming no other forces than gravity acting upon the criminal, his horizontal velocity must keep constant at 5.0 m/s.
So, the horizontal displacement, applying the definition of average velocity, is just:

$\Delta x = v_{h} * t (1)$

In the vertical direction, the criminal is in free fall, starting from rest.
Since we know the dfference in height between both roofs, we can use the kinematic equation for vertical displacement, as follows:

$\Delta h = \frac{1}{2} * g * t^{2} = 2.0 m$

Solving for t, we get:

$t =\sqrt{\frac{2*\Delta h}{g}} = \sqrt{\frac{2*2.0m}{9.8m/s2} } = 0.6 s (2)$

Replacing in (1), we get:

$\Delta x = v_{h} * t = 5.0 m/s * 0.6 s = 3.0 m$

So, if the horizontal distance between the two buildings is larger than 3.0 m, the criminal will fall to ground.

4 0

3 years ago