All categories

3 years ago

What are Radio Waves?

Physics

2 answers:

masha68 [24]3 years ago

6 0

Answer: Radio waves are invisible rays that only radio telescopes can detect.

AfilCa [17]3 years ago

5 0

Radio waves are electromagnetic waves with wavelengths of 1 millimeter or more . . . frequencies of 300 GHz or less.

You might be interested in

Need Help Please and Thank You). Question 1: Explain how longitudinal waves and transverse waves are similar to each other and d

natulia [17]

1) The longitudinal waves move in parallel direction to the source of vibration. The transverse waves move in perpendicular direction to the source of vibration . They are similar in the sense that energy is transferred in the form of waves.

2) Reflection occurs when waves bounce from a surface back toward the source. Refraction is when waves are deflected when the waves go through a substance.

3) The Law of Conservation of Energy

states that energy can neither be created

nor destroyed, it can only be transferred or

changed from one form to another.

7 0

3 years ago

Describe the two phenomenon that caused the contamination of Cleveland’s drinking water

Volgvan

Answer:

Hypoxic water got into their water intact and got into the plantssuch as the algae, which caused the algae to rot.

Explanation:

7 0

3 years ago

Help with these below and the above. I will give brainliest and 20 points!

Juli2301 [7.4K]

height from which it is dropped is 64.8 m

time taken to fall the object is

$h = v_y * t + 0.5 gt^2$

$64.8 = 0 + 0.5 * 9.8 * t^2$

$t = 3.64 s$

so it will take 3.64 s to drop

Since the package is dropped from plane so the package and plane both will have same speed in horizontal direction so with respect to plane the package will always remain in same horizontal position.

Now here since the package is also moving downwards due to free fall so it will always seen as dropped down while we are watching it from the plane

The package appears to fall straight downward.

Let the time trianglet is "t"

now in this interval of time if it falls down by 4 cm

$h = v_y *t + 0.5 gt^2$

$4 = 0 + 0.5* 9.8 * t^2$

$t^2 = \frac{4}{4.9}$

now in same time it covers horizontal distance

$d = v_x * t$

$4 = \sqrt{\frac{4}{4.9}} * v_x$

$v_x = 4.43 m/s$

now after two trianglet the horizontal position will be

$x = v_x * t$

$x = 4.43 * 2*\sqrt{\frac{4}{4.9}}$

$x = 8 cm$

$y = v_y * t + 0.5 g t^2$

$y = 0 + 0.5 * 9.8 * 4 * \frac{4}{4.9} = 16 cm$

so it is 8 cm to the right and 16 cm below

Speed horizontal = 42 m/s

distance covered = 60 ft 6 inch

$d = 60.5 * 0.3048 = 18.44$

time taken to cover the distance

$x = v* t$

$18.44 = 42 * t$

$t = 0.44 s$

now the distance by which it is dropped

$y = \frac{1}{2}gt^2$

$y = 0.5 *9.8*0.44^2 = 0.944 m$

here the velocity of projectile will increase when it will fall under gravity

So here it we can see initially it is moving up against the gravity so its speed will increase but after that its speed will increase when it starts falling down

So the correct answer is Between B to C

when x coordinate is 1000

time taken to reach that point will be

$x = v_x * t$

$1000 = 50 * t$