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Tju [1.3M]
3 years ago
9

The speed of the ball when it returns to the same horizontal level

Physics
1 answer:
stellarik [79]3 years ago
4 0

8.0 m/s if there is no air resistance. (B)

Less if there IS any air resistance.

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watching television with the remote control in your hand which of the folling exerts the greatest gravitational force on you
mote1985 [20]

Answer:

the remote

Explanation:

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3 years ago
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A hiker walks 15km due east then heads due north for 8km . What is the direction of the resultant vector?
4vir4ik [10]

his displacements are given as

d_1 = 15 km East

d_2 = 8 km North

now we can find the direction of displacement by using the concept

\theta = tan^{-1}\frac{\deta y}{\delta x}

\theta = tan^{-1}\frac{8}{15}

\theta = 28.1 degree

magnitude of displacement is given as

d = \sqrt{x^2 + y^2}

d = \sqrt{15^2 + 8^2}

d= 17 km

<em>so the displacement is 17 km at angle 28.1 degree North of East</em>

8 0
3 years ago
Water is poured slowly into the container until the water level has risen into tubes A, B, and C. The water doesn't overflow fro
d1i1m1o1n [39]

Answer:

dA = dB = dC

Explanation:

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3 years ago
Part 1: Use complete sentences to explain why solar winds occur. Part 2: Give two examples in which solar winds impact Earth.
Troyanec [42]

Part 1

When the solar atmosphere accumulates a lot of magnetic energy to a point that cannot accumulate more, all that magnetic energy is suddenly released, and with it, a lot of radiation. So much, that in fact it covers all of the electromagnetic spectrum; from radio waves to gamma rays. That burst of radiation is called a solar flare. In a single solar flare the amount of radiation released is millions of times greater than all the nuclear bombs in the face if the earth exploding together. Lucky for us, most of the high-energy radiation dissipates before reaching the Earth, and the radiation that do reach us, is deflected by the Earth’s magnetic field.

Part 2

1.  Not all the radiation of solar flares that reach the Earth is deflected by its magnetic field; some of them reach us and charges the upper atmosphere with ionized particles. Those particles react with the gases in the atmosphere and produce a light; that light is what we call Auroras borealis or southern nights; One the most beautiful natural spectacles in earth, who thought Auroras begin their lives as deadly solar flares.

2.  Solar flares contain a lot of high-energy radiation that is extremely dangerous for our electronic devices; when they reach the Earth, they can damage sensible electronics like satellites. A very powerful solar flare could even damage all the electronic devices on the surface of the Earth.

4 0
3 years ago
A roller coaster car is going over the top of a 18-mm-radius circular rise. At the top of the hill, the passengers "feel light,"
Andre45 [30]

Answer:

0.29713 m/s

Explanation:

m = Mass of person

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity

r = Radius = 18 mm

By balancing the forces in the system we have

mg-N=\dfrac{mv^2}{r}\\\Rightarrow mg-\dfrac{mg}{2}=\dfrac{mv^2}{r}\\\Rightarrow v=\sqrt{r(g-\dfrac{g}{2})}\\\Rightarrow v=\sqrt{0.018\times (9.81-\dfrac{9.81}{2})}\\\Rightarrow v=0.29713\ m/s

The velocity of the coaster is 0.29713 m/s

7 0
3 years ago
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