Potential Energy = Mass * Gravitational Constant * Height
What We Don't Know: Potential Energy
What We Know:
Mass
Gravitational Constant (9.8 m/s)
Height
Ep = mgh
Ep = 4 * 9.8 * 2
Ep = 78.4 Joules
The Potential Energy of the Rock is 78.4 Joules, based on the given information! Hope this helps you!
Answer:
he correct answer is 7 3 10⁻⁹ s
Explanation:
The speed of light is constant, so we can use the uniform motion ratios
v = x / t
t = x / v
let's calculate
t = 1 / 2.9972 10⁸8
t = 3.336 10⁻⁹ s
the correct answer is 7 3 10⁻⁹ s
Answer : The correct option is (A) " inverse plot, ".
Explanation:
The atmospheric density is defined as the mass of the per unit volume of the atmosphere of earth. It is measured in .
The atmospheric density on a certain planet is found to decrease as altitude increases. So, there is an inverse relationship between the density and the altitude.
From the attached graph, it is clear that there will an inverse plot for altitude vs atmospheric density.
Let point M in the graph shows 1,291 km. So, density at point M should be in between and less than
So, the density can be
Out of given options, the correct one must be (A) because the point M lies closer to point A.
So, correct option is (A) " inverse plot, ".
A sphere is a perfect 3 demention closed surface where every point is an equal distance from the center. And a hemisphere is half of a sphere with one flat side.
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