All categories

3 years ago

Help me FAST! please. I will give BRAINLIEST

Physics

2 answers:

Crazy boy [7]3 years ago

8 0

Answer:

The X-Rays have ranges of energies from 100 eV to 200 keV, this range is commonly knowed as X-Radiation, but the original name is "Röntgen radiation", after the scientist who discovered it, Wilhelm Röntgen.

The electromagnetic radiation that remote controls use is the Infrared radiation (or infrared light), where the energy is lower than the one of the visible light (this is why is called "infrared", because is below of the red frequency) and this is why you can not see these wave signals.

morpeh [17]3 years ago

3 0

1. Gamma radiation

2. Infared Radiation

You might be interested in

what is the rotational kinetic energy of the earth? use the moment of inertia you calculated in part a rather than the actual mo

Ivenika [448]

The Earth's rotational kinetic energy is the kinetic Energy that the Earth

has due to rotation.

The rotational kinetic energy of the Earth is approximately 3.331 × 10³⁶ J

Reasons:

The parameters required for the question are;

Mass of the Earth, M = 5.97 × 10²⁴ kg

Radius of the Earth, R = 6.38 × 10⁶ m

The rotational period of the Earth, T = 24.0 hrs.

$The \ moment \ of \ inertia \ of \ uniform \ sphere \ is \ I = \mathbf{\dfrac{2}{5} \cdot M \cdot R^2}$

Which gives;

$\mathbf{I_{Earth}} = \dfrac{2}{5} \times 5.97 \times 10 ^{24} \cdot \left(6.38 \times 10^6 \right)^2 = 9.7202107 \times 10^{37}$

$\mathrm{The \ rotational \ kinetic \ energy \ is} \ E_{rotational} = \mathbf{\dfrac{1}{2} \cdot I \cdot \omega^2}$

$\mathrm{The \ angular \ speed, \ \omega} = \mathbf{\dfrac{2 \dcdot \pi}{T}}$

Therefore;

$\omega = \dfrac{2 \cdot \pi}{24} = \dfrac{\pi}{24}$

Which gives;

$\mathbf{E_{rotational}} = \dfrac{1}{2} \times 9.7202107 \times 10^{37} \times \left( \dfrac{\pi}{12} \right)^2 = 3.331 \times 10^{36}$

The rotational kinetic energy of the Earth, $E_{rotational}$ = 3.331 × 10³⁶ Joules

Learn more here:

brainly.com/question/13623190

The moment of inertia from part A of the question (obtained online) is that of the Earth approximated to a perfect sphere.

Mass of the Earth, M = 5.97 × 10²⁴ kg

Radius of the Earth, R = 6.38 × 10⁶ m

The rotational period of the Earth, T = 24.0 hrs

3 0

3 years ago

When a cell divides to help repair an organism, what type of cell division is it?

marin [14]

Answer:

Mitosis

Explanation:

Mitosis is the process of making new body cells

4 0

4 years ago

Two teams are playing tug-of-war. Team A, on the left, is pulling on the rope with an effort of 5000 N. If the rope is moving at

Mashutka [201]

Explanation:

If Team A is on the left, B is on the right

if the force is constant, it means that the effort applied is equal.

So Team B is pulling 5000N to the right.

6 0

3 years ago

What is the speed in km/min of a skater who travels a distance of 210 m in a time of 30 seconds

Artyom0805 [142]

Answer: 0.42 km/min

Explanation:

total distance traveled(in meters) = 210m

total distance traveled(in km) = 210 ÷ 1000 = 0.21 km

total time taken(in seconds) = 30 s

total time taken(in minutes) = 30 ÷ 60 = 0.5 s

speed =(distance traveled)÷(time taken)[in km/min] = 0.21 ÷ 0.5 = 0.42km/min

7 0

3 years ago

It has been theorized that all of the modern continents on Earth were once part of a single continent. What scientific evidence

HACTEHA [7]

Answer:

Explanation:

It is not just one of these answers, in fact they all make sense. But the one I learned in school was that when the continents were still one super continent- Pangea, animals fossilized wear the borders of modern day continents were. This later on scientists found half of an animal fossil on the edge of one continent and the other half on the edge of a different continent.

hope this helps

~Lalagrl

4 0

4 years ago

Read 2 more answers