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OLga [1]
3 years ago
14

PLEASE HELP ME WITH THIS ONE QUESTION

Physics
1 answer:
melamori03 [73]3 years ago
3 0

Explanation:

First, we convert the energy from eV to Joules:

2.90\:\text{eV}×\left(\dfrac{1.6×10{-19}\:J}{1\:\text{eV}} \right)

= 4.64×10^{-19}\:\text{eV}

We know from definition that

E=h\nu = \dfrac{hc}{\lambda}

so the wavelength of the photon is

\lambda = \dfrac{hc}{E} = 4.28×10^8\:\text{m}

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A U-shaped tube, open to the air on both ends, contains mercury. Water is poured into the left arm until the water column is 10.
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A pendulum swings back and forth. If the mass of the pendulum is 3kg and it starts from a height of 1m.How much kinetic energy d
tatiyna

From the principle of energy conservation, the kinetic energy of the pendulum at 0.5 m is 14.7 J.

<h3>What is a pendulum?</h3>

A pendulum swings back and forth and can be used to show the change of potential energy to kinetic energy and vice versa.

Given that the kinetic energy is converted to the potential energy; the potential energy at 0.5 m is 3 * 9.8 * 0.5 = 14.7 J.

Following the principle of energy conservation, the kinetic energy of the pendulum at 0.5 m is 14.7 J.

Learn more about pendulum:brainly.com/question/14759840

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