3 years ago

What’s the answer to this problem ? with work pls !!

Physics

1 answer:

mars1129 [50]3 years ago

4 0

This is the answer to Question 5

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An object is moving at a speed of 20 m/s and has a kinetic energy of 10,000 J. What is the mass of the object?

Ratling [72]

Answer:

m=100kg

Explanation:

E=1/2mv^2

10000=1/2m(20)^2

10000=1/2m(400)

10000=1/2m200

50=1/2m

100=m

3 0

3 years ago

What happens to the wavelength of a wave on a string when the frequency is doubled

frozen [14]

Answer:

$\lambda'=\dfrac{1}{2}\times \lambda$

Explanation:

The number of oscillation per unit time is called frequency of a wave while the distance between two consecutive crests and the trough is called its wavelength.

The wavelength of a wave is given by :

$\lambda=\dfrac{v}{f}$

If frequency is doubled, f' = 2f

$\lambda'=\dfrac{v}{f'}$

$\lambda'=\dfrac{v}{2f}$

$\lambda'=\dfrac{1}{2}\times \dfrac{v}{f}$

$\lambda'=\dfrac{1}{2}\times \lambda$

So, when the frequency is doubled the wavelength of a wave on the string becomes half.

5 0

4 years ago

I’m gonna take a break for a few hours, possibly the whole weekend because I feel sick and uncomfortable: my stomache is a bothe

Scrat [10]

K shawty you do you

8 0

3 years ago

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Our sun has a low absolute magnitude compared to many other stars but appears very bright to us because of its

nadya68 [22]

relative closeness to earth

6 0

3 years ago

has been proposed to use an array of infrared telescopes spread over thousands of kilometers of spaceto observe planets orbiting

Katen [24]

Answer:

$\triangle x=1.135 *10^9km$

Explanation:

From the question we are told that:

Diameter of array $d=6000km \approx 6000*10^3$

Infrared wavelength $\lambda =10m$

Distance of planet $d=59 light\ years \approx 55.82*10^{16}m$

Generally the equation for Diffraction is mathematically given by

$sin\theta =1.22\frac{\lambda}{D}$

Given that

$sin\theta=\frac{\triangle x}{R}$

Therefore

$\frac{\triangle x}{R}=1.22\frac{\lambda}{D}$

$\triangle x=1.22\frac{R \lambda}{D}$

$\triangle x=1.22\frac{10 *55.82*10^{16}}{6000*10^3}$

$\triangle x=1.135 *!0^1^2m$

$\triangle x=1.135 *10^9km$

6 0

3 years ago