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2 years ago

The energy of a photon of light emitted by an electron equals the

Physics

1 answer:

VladimirAG [237]2 years ago

4 0

The correct answer is: Difference in energy between two levels.

Hope this helped

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What makes a submarine dive?

sineoko [7]

Letting water into its tanks, and letting it push air out, increases the density of the submarine. Once its density becomes greater than 1 (the density of the water it's floating in), it starts to sink.

The more water is let into the tanks, the greater the sub's density becomes, and the faster it sinks ... (it becomes more like a rock).

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3 years ago

Give two examples of measurement<br>used in our daily life

ddd [48]

Answer:

baking and temperature

Explanation:

when baking you have to measure out ingredients to make sure they can go together and create the wanted outcome of flavor and texture

Temperature is a measurement of the weather and it can help us determine the clothes were going to wear and the activities we can and can not take part in

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2 years ago

A baseball player swings at a baseball of m = 0.23 kg. The force exerted on the ball by the bat is 5.0 N forward. What is the fo

Jlenok [28]

5 N backwards because it exerts an equal and opposite force

5 0

3 years ago

Read 2 more answers

A soccer ball of diameter 22.6cm and mass 426g rolls up a hill without slipping, reaching a maximum height of 5m above the base

-Dominant- [34]

Answer with Explanation:

We are given that

Diameter=d=22.6 cm

Mass,m=426 g= $426\times 10^{-3} kg$

1 kg=1000 g

Radius,r= $\frac{d}{2}=\frac{22.6}{2}=11.3 cm=11.3\times 10^{-2} m$

1m=100 cm

Height,h=5m

$I=\frac{2}{2}mr^2$

a.By law of conservation of energy

$\frac{1}{2}I\omega^2+\frac{1}{2}mv^2=mgh$

$\frac{1}{2}\times \frac{2}{3}mr^2\omega^2+\frac{1}{2}mr^2\omega^2=mgh$

$v=\omega r$

$gh=\frac{1}{3}r^2+\frac{1}{2}r^2=\frac{5}{6}r^2\omega^2$

$\omega^2=\frac{6}{5r^2}gh$

$\omega=\sqrt{\frac{6gh}{5r^2}}=\sqrt{\frac{6\times 9.8\times 5}{5(11.3\times 10^{-2})^2}}=67.86 rad/s$

Where $g=9.8m/s^2$

b.Rotational kinetic energy= $\frac{1}{2}I\omega^2=\frac{1}{2}\times \frac{2}{3}mr^2\omega^2=\frac{1}{2}\times \frac{2}{3}(426\times 10^{-3})(11.3\times 10^{-2})^2(67.86)^2=8.35 J$

Rotational kinetic energy=8.35 J

6 0

3 years ago

True or false? A proton carries a positive charge.

Setler79 [48]

True a proton carries a positive charge, a neutron carries a neutral charge and an electron carries a negative charge.

6 0

3 years ago