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3 years ago

9

Heyy!! Please answer this correctly, it’s for my test. Do not spam or say you don’t know or you will be reported. If you don’t k

now, please ignore. Thank you!

1 answer:

Sergeu [11.5K]3 years ago

6 0

Not trying to be mean plzz dont report me but I don’t see the question

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A body moving with an initial velocity of 30m/s accelerates uniformly at the rate of 10m/s . what is the distance covered during

nikdorinn [45]

Answer:

The distance covered by the body is, S = 800 m

Explanation:

Given data,

The initial velocity of the body, u = 30 m/s

The acceleration of the body, a = 10 m/s²

Let the time period of travel be, t = 10 s

Using the II equations of motion,

S = ut + ½ at²

Substituting the given values,

S = 30 x 10 + ½ x 10 x 10²

S = 800 m

Hence, the distance covered by the body is, S = 800 m

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3 years ago

In an electron microscope, electrons are accelerated to great velocities. Calculate the wavelength of an electron traveling with

Diano4ka-milaya [45]

Answer:

Wavelength, $\lambda=1.04\times 10^{-13}\ m$

Explanation:

It is given that,

Velocity of an electron, $v=7\times 10^6\ m/s$

Mass of an electron, $m=9.1\times 10^{-28}\ kg$

We need to find the wavelength of an electron. It can be calculated using the De- Broglie wavelength as :

$\lambda=\dfrac{h}{mv}$

$\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-28}\times 7\times 10^6}$

$\lambda=1.04\times 10^{-13}\ m$

So, the wavelength of an electron is $1.04\times 10^{-13}\ m$ . Hence, this is the required solution.

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3 years ago

A mass attached to the end of a spring is oscillating with a period of 2.25 s on a horizontal frictionless surface. The mass was

Rudiy27

Answer:

$X=0.0389m$

Explanation:

From the question we are told that:

Period of spring $T_s=2.25s$

Initial Position of Mass $x=0.0480m$

Final Mass period $T_f=5.85s$

Generally the equation for the Mass location is mathematically given by

$X=xcos*\frac{2\pi T_s}{T_f}$

$X=0.048*cos*\frac{2\pi 5.85}{2.25}$

$X=0.0389m$

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3 years ago

When an object is stationary while making a sound, the pitch of the sound is perceived to be ___________. unchanged lower fluctu

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The answer is Higher

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4 years ago

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What is quantitative?

7nadin3 [17]

<span>To relate or measure the by the quantity of something, not against the quantity</span>

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4 years ago