<span>Objects that fall near Earth’s surface are rarely in free fall.
"Free fall" is the situation where the ONLY force on an object is
the force of gravity, and nothing else.
Objects near Earth's surface are almost always surrounded by air.
If they are falling, then the air is exerting forces on them, and they
are not in "free fall".</span>
The answer is a because it never needs to be insulated
Answer:
The final pressure will be 6.99 N/m^ 2
Explanation:
Initial volume of tire = 2.00 L
Initial pressure of the tire = 7.00 × 10 5 N/m 2
Initial temperature of tire 31 °C
P1V1 = P2V2
7.00 × 10 5 N/m 2 × V1 = 101325×100 → V1 = 1.45×10^(-5) m^3 = 1.45×10^(-2) L
Therefore new pressure = initial pressure - (pressure of released gas filling the entire 2 L)
pressure of released gas filling the entire 2 L = 2 L/(7.00 × 10^5 N/m^ 2 × 1.45×10^(-5) m^3) = 1.197 ×10^(-4) N/m^2
New pressure = 7.00 × 10^5 N/m^2 - 1.197 ×10^(-4) N/m^2
= 6.99 N/m^ 2
Answer:
the answer es c, the doppler Shift of spectral lines within the galaxy's spectrum
Explanation:
This is due to redshift, red approach or redshift, occurs when electromagnetic radiation, usually visible light, which is emitted or reflected from an object, is shifted to red at the end of the electromagnetic spectrum. More generally, redshift is defined as an increase in the wavelength of electromagnetic radiation received by a detector compared to the wavelength emitted by the source. This increase in wavelength corresponds to a decrease in the frequency of electromagnetic radiation. Instead, the decrease in wavelength is called blue shift. Any increase in wavelength is called "redshift", even if it occurs in electromagnetic radiation of non-visible wavelengths, such as gamma rays, X-rays and ultraviolet radiation. This designation can be confusing since at longer wavelengths than red (eg infrared, microwave and radio waves), "redshifts" move away from the red wavelength. So when talking about frequencies of waves smaller than red continues to mean that the wavelength tends to lengthen and not resemble red.
A redshift can occur when a light source moves away from an observer, corresponding to a Doppler shift that changes the perceived frequency of the sound waves. Although the observation of such redshifts, or their counterpart, towards blue, has numerous terrestrial applications (eg Doppler radar and radar gun), astronomical spectroscopy uses Doppler redshifts to determine the movement of distant astronomical objects. This phenomenon was first predicted and observed in the 19th century when scientists began to consider the dynamic implications of the wave nature of light.
Body Fossils and Trace Fossils.
Hope I helped and good luck with school. Bye!
