Answer:
F = 4399 KN
Explanation:
given,
mass of automobile = 890 kg
initial speed = 48 km/h
= 48 × 0.278 = 13.34 m/s
using equation of motion
v² = u² + 2 a × s
0 = 13.34² - 2 a ×0.018
![a = \dfrac{13.34^2}{0.036}](https://tex.z-dn.net/?f=a%20%3D%20%5Cdfrac%7B13.34%5E2%7D%7B0.036%7D)
a = 4943.21 m/s²
F = m × a
F = 890 × 4943.21
F = 4399456.9 N
F = 4399 KN
hence, the Net force is F = 4399 KN
its 55 :) have a great day queen/king/whatever gender you are
<h2>
Answer: D. hotter and bluer.</h2>
Explanation:
The color temperature of a light source (a bulb or a star, for example) is defined by comparing its color within the electromagnetic spectrum with that of the light emitted by a black body (<em>"a theoretical or ideal object that absorbs all the light and all the radiant energy that falls on it"</em>) heated to a certain temperature (expressed in Kelvin).
Then, according to this, a <u>black body with a temperature of 800K will emit its light in red and one at 12200K will emit its light in blue</u>. This means that as the body heats up it will change its color.
In the case of stars, such as Rigel and the Sun, their color varies according to their surface temperature, where <u>the coldest stars are red, and the hottest blue colors.
</u>
So, if Rigel's spectrum peaks in the short-wavelength end of the visible spectrum (violet-blue) and Sun's spectrum peaks in the yellow-green region of the visible spectrum, this only means:
<h2>Compared to the Sun, <u>Rigel is hotter and bluer.</u></h2>
Answer:
RUTHERFORDS EXPERIMENT
Explanation:
Physicist Ernest Rutherford established the nuclear theory of the atom with his gold-foil experiment. When he shot a beam of alpha particles at a sheet of gold foil, a few of the particles were deflected. He concluded that a tiny, dense nucleus was causing the deflections.
-- Heat is a form of energy.
-- Joule is the SI unit of energy.
ergo
-- Joule is a unit of heat.
'Degree Celsius' and 'Kelvin' are units of temperature.
Heat and temperature are different things.
We won't go there right now.