In rainforest sound travels faster because in the ocean sound travels very slow due to the pressure
Answer:
is a sign of a chemical change
Explanation:
The tablet reacts with the water to form carbon dioxide
Answer:
1. Ptolemy.
2. Nicolaus Copernicus.
3. Tycho Brahe
4. Galileo Galilei
5. Isaac Newton
6. William Herschel
7. Johann Galle
8. Clyde Tombaugh
9. Albert Einstein.
10. Edwin Hubble
11. Karl Jansky.
12. Grote Weber.
Explanation:
1. Ptolemy: said sun revolved around earth.
2. Nicolaus Copernicus: aid earth revolved around sun.
3. Tycho Brahe: analyzed motions of planets.
4. Galileo Galilei: first used refracting telescope for astronomy.
5. Isaac Newton: invented reflecting telescope.
6. William Herschel: discovered the planet Uranus.
7. Johann Galle: discovered the planet Neptune.
8. Clyde Tombaugh: discovered the dwarf planet Pluto.
9. Albert Einstein: developed special and general theories of relativity.
10. Edwin Hubble: demonstrated that universe is expanding.
11. Karl Jansky: discovered radio waves from the center of the Milky Way.
12. Grote Weber: an amateur astronomer who built the first radio telescope.
Magnetic domain
Its speed can be slowed because the magnetic field can be turned on and off, can have its direction reversed and can have its strength changed. However, The speed of a magnetic field that is produced by a current is impossible to be slowed.
Answer:
SPST-2
Explanation:
The terms post and pull are also used to describe the contact variations of the switch. The number of "poles" is the number of electrically separated switches that are controlled by a single physical actuator.
For example,
The "SPST" switch is single-pole, single-throw, a simple on / off switch: the two terminals are connected or disconnected from each other.
The "SPDT" switch is single pole, double throw, a simple interrupt changeover switch before making: C (COM, Common) is connected to L1 (NC, normally closed) or L2 (NO, normally open).
"DPST" is bipolar, single shot, equivalent to two SPST switches controlled by one circuit.
"DPDT" is bipolar, double throw, equivalent to two SPDT switches controlled by two circuits.
"3PDT" is 3 pole, double throw, equivalent to 3 SP and DT switches controlled by two circuits.
