Answer:
v ’= - 1.76 10⁻⁴ m / s
Explanation:
We can solve this problem using momentum conservation. Defined a system formed by the patient, his blood and the platform in such a way that the forces are internal and the moment is conserved
initial instnate. Before pumping
p₀ = 0
final instant. Right after the heart pumping
p_f = m v + M v'
where m is the mass of blood and M the mass of the patient + the platform
p₀ = p_f
0 = m v + M v’
v ’= -
let's calculate
v ’= - 0.30
v ’= - 1.76 10⁻⁴ m / s
Answer: choices a and b
Explanation:
Telescope can be defined as am optical instrument which is designed to observe the distant objects clear and nearer. It comprises of arrangement of lenses which allow the rays of light to be collected. The collected light is focused and the image so produced is magnified in the form of an image. The telescopes are prepared and manufactured on mountains top as this will help in preventing the distortion of light obtain from the star due to the fluctuation of air mass in the atmosphere. The atmospheric distortion affects the resolution, and affects the vision. The atmospheric pressure is low at the mountain tops so it will help in better observation of the sky.
Answer:
32°
Explanation:
From the diagrammatic representation of the question,
Point A is the pilot point of view from the airplane
Point C is the foot of the first tree
Point D is the foot of the second tree
Line AB is the height of the airplane from the ground level.
Line CD is the distance between the two trees
Considering ΔABC,
tan 33°
BC = 5000 / tan 33°
BC = 7,699.41 feet
BD = BC + CD
BD = 7,699.41 + 300
BD = 7,999.41 feet
Considering ΔABD,
tan θ
tan θ
tan θ = 0.6250
θ = tan⁻¹ 0.6250
θ = 32°
Answer:
The sun is mainly made up of 75 percent hydrogen and 25 percent helium by mass; the sun's is also composed of less than 0.1 percent various metals and elements, including neon, iron, oxygen and carbon. These atoms form hot plasma that is interwoven with the sun´s magnetic fields.
Hope i helped :)
Explanation: