Answer:
A marble of 15 mm
Explanation:
so lapilli is the size classification of tephra. it is the material that comes out in air during volcanic eruption. the word lapilli means little stones and its size ranges from 2 mm to 64 mm. so the object which has same size as lapilli is the marble.
Answer:
a) <u>gNP = 4.71 x 10^-14 m/s²</u>
b) <u>gNU = 1.06 x 10^-9 m/s²</u>
c) <u>gNU/gNP = 22505.3</u>
Explanation:
The formula for calculating the gravitational field at a planet is given by Newton's Gravitational law. Since the force exerted by 1st planet on 2nd will be equal to weight of the second planet
F = W = mg = GMm/R^2
g = GM/R^2
where,
m = mass of other planet
g = gravitational field at the surface of planet
G = Universal Gravitational Constant = 6.67 x 10^-11 N.m²/kg²
M = Mass of the planet
R = Distance between planets
a)
gNP = (6.67 x 10^-11 N.m²/kg²)(1.4 x 10^22 kg)/(4.45 x 10^12 m )²
<u>gNP = 4.71 x 10^-14 m/s²</u>
b)
gNU = (6.67 x 10^-11 N.m²/kg²)(8.62 x 10^25 kg)/(2.32 x 10^12 m )²
<u>gNU = 1.06 x 10^-9 m/s²</u>
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c)
gNU/gNP = (1.06 x 10^-9 m/s²)/(4.71 x 10^-14 m/s²)
<u>gNU/gNP = 22505.3</u>
HCIO4 is a stronger acid than HCIO because as the number of oxygen increases the oxidation number in the central atom increases which weakens the O-H bond strength and increases the acidity.
Answer:
Explanation:
For equilibrium
mg = kx ( restoring force of spring where k is force constant and x is stretch in it)
x = mg / k
= .5 x 9.8 / 40
= .1225 m
= 12.25 cm
b ) decrease in potential energy
= mgh
= .5 x 9.8 x .1225
= 0.6 J
c ) Energy stored in spring
= 1/2 k x²
= .5 x 40 x ( .1225 )²
= .3 J
It is 50% of gravitational potential energy lost
Rest of the energy might have lost in heating up the spring etc.