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spayn [35]
3 years ago
8

12) Which is MOST LIKELY a solid at room temperature?

Physics
1 answer:
ella [17]3 years ago
4 0
Gold
Silver
Iron
Platinum
Goes on and on 


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The Northern Hemisphere is warmer in spring than in winter, because in spring
Amanda [17]

Both hemispheres are warmer in their Spring than they are
in their Winter, because . . .

A). the sun climbs higher in the sky during Spring than it does during
WInter ... shooting its rays more directly at the ground ...,

and

B).  the sun stays up in the sky longer in Spring than it does in
Winter, giving the ground more time to absorb its rays.

4 0
4 years ago
Read 2 more answers
The normal force equals the magnitude of the gravitational force as a roller coaster car crosses the top of a 40-m-diameter loop
iogann1982 [59]

Answer:

Explanation:

Given

Diameter d=40\ m

radius r=20\ m

From diagram, at top point

If Normal force is equal to Gravitational force

N=mg

where N=normal reaction

m=mass of car

Normal reaction will provide centripetal force

N=\frac{mv^2}{r}

thus

\frac{mv^2}{r}=mg

v=\sqrt{2gr}

v=\sqrt{2\times 9.8\times 20}

v=19.79\ m/s              

5 0
3 years ago
PLEASE HELP I can't figure it out
PSYCHO15rus [73]
D. I know that like the back of my hand
4 0
4 years ago
A bird is flying with a speed of 18.0 m/s over water when it accidentally drops a 2.00 kg fish. If the altitude of the bird is 5
Alina [70]
Here we go.
My abbreviations; KE = Kinetic Energy; GPE = Gravitational Potential Energy.

So first off, we know the fish has KE right when the bird releases it. Why? Because it has horizontal velocity after released! So let’s calculate it:
KE = 1/2(m)(V)^2
KE = 1/2(2)(18)^2
KE = 324 J

Nice!
We also know that the fish has GPE at its maximum height before release:
GPE = mgh
GPE = (2)(9.81)(5.40)
GPE = 105.95 J

Now, based on the *queue dramatic voice* LAW OF CONSERVATION OF ENERGY, we know all of the initial energy of the fish will be equal to the amount of final energy. And since the only form of energy when it hits the water is KE, we can write:
KEi + GPEi = KEf
(Remember - we found the initial energies before!)
(324) + (105.95) = KEf
KEf = 429.95J
And that’s you’re final answer! Notice how this value is MORE than the initial KE from before (324 J) - this is because all of the initial GPE from before was transformed into more KE as the fish fell (h decreased) and sped up (V increased).

If this helped please like it and comment!
4 0
3 years ago
Feng and Isaac are riding on a merry-ground. Feng rides on a horse at the outer rim of the circular platform, twice as far from
kogti [31]

Answer: The question is incomplete or missing details. here is the remaining part of the question ;

1. impossible to determine

2. half of Isaac’s

3. the same as Isaac’s

4. twice Isaac’s

The angular speed of feng will be the same as that of Isaac. Hence the answer is option 3

Explanation:

Since we have been told that both feng and isaac are riding on a merry go round i.e in a circular motion, irrespective of how fast one ride above the other, the angular speed will be constant since they are riding on a merry go round, as such both feng and isaac will maintain equal angular speed, hence the angular speed of feng will be the same as that of Isaac.

4 0
4 years ago
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