The density of mercury is 13560 kg/m³.
Therefore the density of water is about 1000 kg/m³.
1 atm pressure is 101325 Pa.
g = 9.8 m/s²
The height of a water column, h, needed to measure 1 atm is given by
(1000 kg/m³)*(9.8 m/s²)*(h m) = 101325 Pa
h = 1013225/9800 = 10.3393 m = 1033.93 cm
Answer: 10.339 m or 1033.9 cm
Radio waves and visible light are both forms of electromagnetic radiation, so they both travel at the speed of light in vacuum. What makes them different are their wavelengths (or synonymously their frequencies).The wavelengths of visible light span from about 390-700 nm, and the frequency from 430 to 790 THz.The wavelengths of radio waves go from about 1 mm to 100 km, and frequencies between 3 kHz and 300 GHz.The different sized wavelengths also give rise to slightly different properties. For example, since radio waves have a longer wavelength and lower frequencies, they are less energetic than visible light. Recall:Elight=hν=hcλ
where Elight is the energy of the light, h is Planck's constant, c is the speed of light, νis the frequency of light, and λ is the wavelength
Answer: i guess d is the correct answer
Answer:
67.8 m.
Explanation:
For 0.3 sec which is the response time , he will keep on moving with velocity
undiminished or at 26 m/s .
Distance travelled during this period
= 26 x .3 =7.8 m
For rest of the time ie during 4 - .3 = 3.7 s , he decelerates with deceleration of 5.3 ms⁻² and initial velocity of 26 m/s
s = u t - 1/2 a t²
s = 26 x 3.7 - .5 x 5.3 x 3.7 x 3.7
= 96.2 - 36.28
= 60 m approx.
Total distance travelled
=60 + 7.8 = 67.8 m.
Answer:
<em>C. Zero </em><em>acceleration</em><em>.</em><em>.</em><em>.</em><em>.</em>