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3 years ago

9

What happens if I increase the height of a skater

2 answers:

satela [25.4K]3 years ago

7 0

Answer:

The higher the skater is the more potential energy he has. As his height decreases, his potential energy decreases and his kinetic energy increases.

Explanation:

Make me BRAINLIST please

denis-greek [22]3 years ago

5 0

Answer:

The higher the skater is the more potential energy he has. As his height decreases, his potential energy decreases, and his kinetic energy increases. ... Explore how the skater's change in speed relates to the potential and kinetic energy of the skater.

Explanation:

(Via Uteach)

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Explain how momentum is transferred when a golfer hits a ball with a golf club.

melomori [17]

Momentum is transferred through the convert wich in this case is the golf club

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4 years ago

A supernova is a large explosion that takes place at the end of a star's life cycle. Although supernovas only burn for a short a

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3 years ago

A shaving or makeup mirror is designed to magnify your face by a factor of 1.40 when your face is placed 20.0cm in front of it

Dennis_Churaev [7]

Answer:

(a) convex mirror

(b) virtual and magnified

(c) 23.3 cm

Explanation:

The having mirror is convex mirror.

distance of object, u = - 20 cm

magnification, m = 1.4

(a) As the image is magnified and virtual , so the mirror is convex in nature.

(b) The image is virtual and magnified.

(c) Let the distance of image is v.

Use the formula of magnification.

$m =-\frac{v}{u}\\1.4=-\frac{v}{-20}\\v =28 cm$

Use the mirror equation, let the focal length is f.

$\frac{1}{f}=\frac{1}{v}+\frac{1}{u}\\\frac{1}{f}=\frac{1}{28}+\frac{1}{20}\\\frac{1}{f}=\frac{28+20}{560}\\f=11.67cm$

Radius of curvature, R = 2 f = 2 x 11.67 = 23.3 cm

5 0

3 years ago

How much energy is required to ionize hydrogen when it is in the n = 5 state?

PtichkaEL [24]

Answer:

0.544 eV

Explanation:

To ionize the hydrogen atom $n_f\rightarrow infinte$

So the required energy is $\Delta E=13.6(\frac{1}{n_i^2}-\frac{1}{n_f^2})$ as $n_f\rightarrow infinte$

So $\Delta E=13.6\frac{1}{n_i^2}$

We have to calculate the energy required to ionize hydrogen atom when it is in n=5

So the energy should be less than $\Delta E=13.6\frac{1}{5^2}=0.544eV$

4 0

3 years ago

Answer question photo attached

Lerok [7]

Answer:

Sry but the question is not visible.......so plzz attach another image

6 0

4 years ago