The Global Positioning System, or GPS, uses a network of satellites that orbit the Earth to calculate and track locations. Which of the following best describes the signals sent and received by satellites?A.
gravitational energy
B.
potential energy
C.
sound waves
D.
electromagnetic waves
Answers
Electromagnetic waves best describes the signals sent and received by satellites. Therefore, the correct option is option D.
What is electromagnetic waves?
In classical physics, electromagnetic radiation refers to the movement of energy through a material medium or across empty space at the speed of light in the form of the magnetic and electrical fields that comprise up electromagnetic waves like electromagnetic radiation, visible light, including gamma rays.
Time-varying magnetic and electric fields are linked to one another at right angles or perpendicular towards the direction that of motion in such a wave. The strength and wavelength v of the time fluctuation of the magnetic and electricity fields define an electromagnetic wave. Electromagnetic waves best describes the signals sent and received by satellites.
Therefore, the correct option is option D.
To know more electromagnetic waves, here:
#SPJ2
Answer:
D
Explanation:
electromagnet STUDY ISLAND :)
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5.0 x 10-11M
2.0 x 10-12M
5.0 x 10-12 M
1.0 10-12 M
Answers
Answer: 5.0 x 10-12 M
Explanation:
It is well known that; pH + pOH = 14.
pOH = - log [ OH-]
= - log [ 2.0 x 10 ∧-3]
= 3 - log 2
= 3 - 0.301 = 2.7 approximately.
recall that, pH + pOH = 14, therefore; pH = 14 - 2.7 = 11.3
pH= - log [ H3O+]
11.3 = - log [H3O+], take the antilog of 11.3, gives us;
[H3O+] = antilog of - 11.3, which gives 5.0 x 10-12 M
Answers
We assume the change in volume occurs at constant temperature and so we use the Boyle's law formula .
We are given the initial volume and pressure as well as as final volume, the question wants the final pressure
So we make the subject of the formula
Dalton
B.
Rutherford
C.
Democritus
D.
Bohr
E.
Thomson
Answers
Answer:
The scientist is E. Thomson.
Explanation:
In the late nineteenth century, physicist J.J. Thomson started trying different things with cathode beam tubes. Cathode beam cylinders are fixed glass tubes from which the greater part of the air has been emptied. A high voltage is applied crosswise over two terminals toward one side of the cylinder, which makes a light emission stream from the cathode (the contrarily charged anode) to the anode (the emphatically charged cathode).
The cylinders are called cathode beam tubes on the grounds that the molecule bars or “cathode beam” begins at the cathode. The beam can be distinguished by painting a material known as phosphors onto the most distant finish of the cylinder past the anode. The phosphors sparkles, or produces light, when affected by the cathode beam.
Answers
Source: Exam as well
Good luck!
Answers
Answer:
Caustic Soda
Limewater
Milk of Magnesia
Bleach
Explanation:
Answers
Answer:
mass Mg = 1.937 Kg
Explanation:
from periodic table for Mg:
⇒ molecular mass Mg = 24.305 g/mol
∴ mol ≡ 6.022 E23 atoms
⇒ mol Mg = (4.80 E25 atoms)×(mol/6.022 E23 atoms)
⇒ mol Mg = 79.708 mol
⇒ mass Mg = (79.708 mol)×(24.305 g/mol)
⇒ mass Mg = 1937.3 g
⇒ mass Mg = 1.937 Kg