2 years ago

When was the first ozone hole discovered

Physics

1 answer:

Sveta_85 [38]2 years ago

5 0

Answer: July 1st 1910

Explanation:

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Ezra is pulling a sled, filled with snow, by pulling on a rope attached to the sled. The rope makes an angle θ with respect to t

svetoff [14.1K]

Answer:

Explanation:

Given

rope makes an angle of $\theta$

Mass of sled and snow is m

Normal Force $=F_N$

applied Force is F

as Force is pulling in nature therefore normal reaction is given by

$F_N=mg-F\sin \theta$

Also $F\cos \theta =f_r$

$f_r=\mu _k\cdot F_N$

$f_r=\mu _k\cdot (mg-F\sin \theta )$

$F\cos \theta =\mu _kF_N$ -------1

$F\sin \theta =mg-F_N$ ---------2

Squaring 1 & 2 and then adding

$F^2=(\mu _kF_N)^2+(mg-F_N)^2$

$F=\sqrt{(\mu _kF_N)^2+(mg-F_N)^2}$

Substitute value of F in 1

$cos\theta =\frac{\mu _KF_N}{\sqrt{(\mu _kF_N)^2+(mg-F_N)^2}}$

$\theta =cos^{-1}(\frac{\mu _KF_N}{\sqrt{(\mu _kF_N)^2+(mg-F_N)^2}})$

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2 years ago

Consider the train car described in the previous part. Another experiment is conducted in it: A net force of 20N is applied to a

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Answer:

Explanation:

The supplied information about the object and train is incomplete. Acceleration is the rate at which the velocity of a body changes with time. Here the velocity and time is not given

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3 years ago

What is the acceleration of a softball if it has a mass of 0.5 kg and hits the cathers glove with a force of 25n

ioda

Acceleration is found if we have the force and mass.

With the following equation: F = ma, we can find the missing values.

F = 25n
M = 0.5 kg
a = ?

a = f/m
a = 25/0.5
a = 50

a = 50 m/s

So, the acceleration is 50 m/s^2

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2 years ago

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2 years ago

NaOH + FeCl3* Na Cl + Fe 10H)3<br> balanced

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3NaOH + FeCl3 → 3NaCl + Fe(OH)3

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2 years ago

When was the first ozone hole discovered ​

When was the first ozone hole discovered