That depends on what the sound is traveling through, and the density
and temperature of the substance.
In dry air, at sea-level pressure and 68° F, the speed of sound is
about 340 meters per second (761 miles per hour).
We are 8 light minutes from the sun. That means two things, we see the sun as it was 8 minutes ago, and we WOULD continue to see the sun for 8 minutes after it disappeared.
I would say because they have the same negative charge and they repel each other
Answer:
<em>The fringe spacing on a distant diffraction screen will increase.</em>
Explanation:
Blue light has a shorter wavelength than red light, so, changing from blue to red light is basically increasing the wavelength of the light involved in the experiment.
In the double slit experiment, the fringe spacing on a diffraction screen is calculated from the equation below
ω = zλ/d
where ω is the fringe spacing
z is the distance of the slit to the screen
λ is the wavelength of the light used
d is separation or distance between the slits
From the equation, one can see that if other parameters are held constant, <em>increasing the wavelength will lead to an increase in the spacing between the fringes, and hence, changing the light from blue to red light will increase the fringe spacing.</em>
Test:
Performing a Litmus Test
Result:
Litmus paper gives the user a general indication of acidity or alkalinity as it correlates to the shade of red or blue that the paper turns.
- To test the pH of a substance, dip a strip of litmus paper into the solution or use a dropper or pipette to drip a small amount of solution onto the litmus paper.
- Blue litmus paper can indicate an acid with a pH between 4 and 5 or lower.
- Red litmus paper can show a base with a pH greater than 8.
- If a solution has a pH between 5 and 8, it will show little color change on the litmus paper.
- A base tested with blue litmus paper will not show any color change, nor will an acid tested with red litmus paper register a change in color.