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3 years ago

Desert climates can have very hot days and very cold nights. This is because _____.

2 answers:

7 0

There is usually a clear skhy

it provides a clear shot for the heat of the sun on the sand and sand can cool very quickly so it allows the air to cool just as fast

hope i helped
Dosvedanya :)

daser333 [38]3 years ago

6 0

Answer:

The correct answer is option B, Clear Sky

Explanation:

The temperature during the day time rises to maximum as there is no moisture in the atmosphere. The moisture being extremely low leads to formation of no clouds/or very rare clouds . Due to no clouds, sky is clear and thus the heat from the sun does not stay close to the Earth surface and it is radiated back to the maximum extent causing the temperatures at night falling to nearly freezing.

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a train engineer started the train from a standstill and sped up to 5 meters per second, she then rounded a corner at a constant

olasank [31]

for acceleration we can define that rate of change in velocity is know as acceleration

So whenever velocity of train is changing with time we can say train is accelerating

Now here if initially train is standstill then after some time its speed is 5 m/s

so here the train is accelerated first time

Then on straight path its speed changed from 5 m/s to 10 m/s so here train gets accelerated second time

After this train chugged around a curve with same speed 10 m/s

SO here since train is moving in curve so here its direction of velocity is continuously changing and this type of acceleration is known as centripetal acceleration

SO this is accelerated Third time

Then its speed decreases and it comes to speed of 5 m/s from 10 m/s

So here it is acceleration of train for Fourth time

Then finally train comes to stop so again its speed changed from 5 m/s to 0

so this is acceleration of train Fifth time

So total train will accelerate 5 times in whole path

3 0

2 years ago

What is undefined <br> I need help I don't understand this question

Wittaler [7]

(4/9-9) and (4/0) are undefined as you can not divide by the value of 0.

6 0

3 years ago

Read 2 more answers

A charged capacitor is connected to an ideal inductor. At time t = 0, the charge on the capacitor is equal to 6.00 μC. At time t

Len [333]

Answer:

$4.71\times 10^{-3}A$

Explanation:

$Q_{max}$ = Maximum charge stored by capacitor = 6 μC = 6 x 10⁻⁶ C

$t$ = time taken for charge on the capacitor to become zero = 2 ms = 2 x 10⁻³ s

Time period is given as

$T = 4t$

$T = 4(2\times 10^{-3})$

$T = 8\times 10^{-3} s$

Angular frequency is given as

$w = \frac{2\pi }{T}$

$w = \frac{2(3.14) }{8\times 10^{-3}}$

$w$ =785 rad/s

Charge at any time is given as

$Q(t) = Q_{max}Coswt$

Taking derivative both side relative to "t"

$\frac{\mathrm{d}Q(t) }{\mathrm{d} t} = \frac{\mathrm{d}(Q_{max}Coswt) }{\mathrm{d} t}$

$i(t)= -Q_{max} w Sinwt$

Amplitude of the current is given as

$i_{max}= Q_{max} w$

$i_{max}= (6\times 10^{-6}) (785)$

$i_{max}= 4.71\times 10^{-3}A$

8 0

3 years ago

A block slides down a plane inclinded at an angle of 37° to the vertical with an acceleration of 6m/s each second. what is the c

Irina18 [472]

Answer:

0.315

Explanation:

resolving weight into components and applying second law of motion we obtain the result

All has been explained in attachment

Download pdf

6 0

3 years ago

Why is evidence of meteorite impact rare on earth, despite the fact that meteoroids often pass into earth's atmosphere?

DENIUS [597]

The fact is your rooftop is covered with dust particles from meteorites. Outerspace is full of debris. Every day, thousands of meteorites invade our home but thanks to atmosphere for keeping us safe from them :D
When these meteorites enter our atmosphere, they experience resistance to the particles present in our atmosphere. As a result they catch fire(and eventually melts) and lose all their energy before falling on the surface. This happens with very small sized meteorites but when bigger ones enter, they surely hit the surface because they are difficult to melt.
Thanks to Jupiter for saving us from asteroids. Bigger ones rarely enters our atmosphere because of Jupiter's gravitational pull. It lures all the debris towards itself (:

5 0

3 years ago