Two forces act concurrently on an object. Their

lozanna [386]

Answer:

Time use of cellphone times 3 hours before sleep.

Explanation:

It is scientifically proven that cell-phone use before bed can disturb your sleep. The blue light can cause your brain to release chemicals that associate with staying awake or even waking up. So measure the hours or minutes you use your phone 3 hours before you go to sleep.

8 0

3 years ago

What property do liquids and gases share

vodka [1.7K]

Answer:

A is correct

Explanation:

6 0

3 years ago

A beam of monochromatic light (f =5.09 ×1014 Hz) has a wavelength of 589 nanometers in air. What is the wavelength of this light

frosja888 [35]

Lucite has a refractive index of n=1.50. This means that the speed of the light in lucite is decreased according to:
$v=\frac{c}{n}$
where $c=3 \cdot 10^8 m/s$ is the speed of light in air. Putting the number in the formula, we find that the speed of light in lucite is
$v=\frac{3 \cdot 10^8 m/s}{1.50}=2\cdot 10^8 m/s$
The frequency of the light is $f=5.09 \cdot 10^{14}Hz$ , so now we can calculate the wavelength in lucite by using the formula:
$\lambda=\frac{v}{f}=\frac{2\cdot 10^8 m/s}{5.09 \cdot 10^{14} Hz}=3.93 \cdot 10^{-7} m=393 nm$
<span>Therefore, the correct answer is (2) 393 nm.</span>

7 0

3 years ago

I think these two are simple questions.. but I need help asap..... TT

frosja888 [35]

1) The average velocity is 56 m/min

2) The average velocity is -83 m/min

Explanation:

1)

The average velocity of an object is given by

$v=\frac{d}{t}$

where

d is the displacement (change in position)

t is the time elapsed

In the graph in the problem, the displacement corresponds to the distance, therefore to the change in the y-variable ( $\Delta y$ ), while the time elapsed is the change in the x-variable ( $\Delta x$ ), so the average velocity can be written as

$v=\frac{\Delta y}{\Delta x}$

At point A, we have:

$y_A = 5 m\\x_A = 0.1 min$

At point B, we have:

$y_E = 55 m\\x_A = 1 min$

So, we have

$\Delta y= 55 -5 = 50 m\\\Delta x = 1.0-0.1 = 0.9 min$

So the average velocity is

$v=\frac{50 m}{0.9 min}=56 m/min$

2)

In this part instead, we have the following:

At point F, we have:

$y_F = 55 m\\x_A = 1.3 min$

At point H, we have:

$y_H = 30 m\\x_A = 1.6 min$

So, we have

$\Delta y= 30 -55 = -25 m\\\Delta x = 1.6-1.3 = 0.3 min$

So the average velocity is

$v=\frac{-25 m}{0.3 min}=-83 m/min$

Learn more about velocity:

brainly.com/question/8893949

brainly.com/question/5063905

#LearnwithBrainly

4 0

3 years ago

What would happen if an Asteroid hit earth?

svp [43]

Answer:

There would be tremendous earthquakes and tsunamis, followed by massive volcanism around the impact zone. The ozone layer would be destroyed. The oceans would turn acidic. The Sun would be blotted out, probably for decades.

Explanation:

Hope this helps!

4 0

3 years ago

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