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Sunny_sXe [5.5K]
4 years ago
10

Kent is twirling a ball attached to a string in a clockwise direction. If Kent lets go of the string, which of the following des

cribes the motion that the ball will take if there are no gravitational forces influencing the motion of the ball?
A.
It will curve down and then turn back up.
B.
It will fall straight to the ground.
C.
It will continue in a straight line.
D.
It will curve up and then fall to the ground.
Physics
2 answers:
iVinArrow [24]4 years ago
7 0
<span>C. 
It will continue in a straight line.</span>
iragen [17]4 years ago
6 0
C it will continue in a straight line 
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Answer:

K.E = 5.53 eV = 8.85 x 10⁻¹⁹ J

Explanation:

First we calculate the energy of photon:

E = hc/λ

where,

E = Energy of Photon = ?

h = Plank's Constant = 6.626 x 10⁻³⁴ J.s

c = speed of light = 3 x 10⁸ m/s

λ = wavelength = 120 nm = 1.2 x 10⁻⁷ m

Therefore,

E = (6.626 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(1.2 x 10⁻⁷ m)

E = (16.565 x 10⁻¹⁹ J)(1 eV/1.6 x 10⁻¹⁹ J)

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Now, from Einstein's Photoelectric equation we know that:

Energy of Photon = Work Function + K.E of Electron

10.35 eV = 4.82 eV + K.E

K.E = 10.35 eV - 4.82 eV

<u>K.E = 5.53 eV = 8.85 x 10⁻¹⁹ J</u>

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which term refers to energy derived from heat inside the Earth ? a) geothermal energy b) solar energy c) fossil fuel d) volcanic
Katyanochek1 [597]
The answer is a) geothermal energy. I may be wrong, sorry!
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4 years ago
What is the momentum of a 8kg ball rolling at 25 m/s?
aleksley [76]

Answer:

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Explanation:

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2. A marble is rolling at a velocity of 1.5 m/s with a momentum of 3.0 kg×m/s. What is its mass?
Nikolay [14]

Answer:

m= 2[kg]

Explanation:

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