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3 years ago

I need help asap

Physics

2 answers:

galben [10]3 years ago

8 0

Answer: The answer is A

Explanation:

irina [24]3 years ago

6 0

Answer:

Hello There!!

Explanation:

The answer is a. The first electric motor ever made.

hope this helps,have a great day!!

~Pinky~

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ASAP ONLY CORRECT ANSWERS PLZZZZZZZZZZZZZ

ycow [4]

Answer b

Explanation:

thank me later

5 0

3 years ago

Read 2 more answers

A hot air balloon is traveling vertically upward at a constant speed of 4.5 m/s. When it is 28 m above the ground, a package is

ella [17]

Answer:

1.97 seconds

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

$s=ut+\frac{1}{2}at^2\\\Rightarrow 21=4.5t+\frac{1}{2}\times -9.8\times t^2\\\Rightarrow 21=-4.5t-4.9t^2\\\Rightarrow 4.9t^2+4.5t-28=0\\\Rightarrow 49t^2+45t-280=0$

Solving the above equation we get

$t=\frac{-45+\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}, \frac{-45-\sqrt{45^2-4\cdot \:49\left(-280\right)}}{2\cdot \:49}\\\Rightarrow t=1.97, -2.89$

So, the time the package was in the air is 1.97 seconds

3 0

3 years ago

What prevents the pressure from increasing as a cloud contracts due to its gravity?

Vesnalui [34]

Thermal energy is converted to radiative energy via molecular collisions and released as photons.

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3 years ago

HELP HELP HELP HELP IIII NEED HELP!!!!

romanna [79]

Answer:

Heavy Rains.

These heavy rains can lead to severe flooding by oversaturating the ground, overfilling storm drains, or causing rivers to spill over their banks or levees

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2 years ago

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A spring with constant k = 78 N/m is at the base of a frictionless, 30.0°-inclined plane. A 0.50-kg block is pressed against the

olasank [31]

Explanation:

The given data is as follows.

Spring constant (k) = 78 N/m, $\theta = 30^{o}$