I think it is B because gravity is <span>the field force of mutual attraction between any two masses, especially an object and the earth</span>
For the first one 320
second
1200W
Data
R = 12 Ω ∆V = 120V I =? P =?
Solution:
According to Ohm’s law,
∆V = I R
I = ∆V / R
= 120 / 12
= 10 A
Power P = I ∆V
= 10 x 120
= 1200 W
Third
∆V = 120 V P = 60 W I =? R =?
Use the formula, P = I ∆V
I = P / ∆V = 60 / 120 = 0.5 A
∆V = I R
R = ∆V / I = 120 / 0.5 = 240 Ω
Answer:
percent abundance of the heaviest isotope is 78 %
Explanation:
given data
atomic weight = 48.68 amu
mass 1 = 47 amu
mass 2 = 48 amu
mass 3 = 49 amu
natural abundance = 10 %
to find out
percent abundance of the heaviest isotope
solution
we consider here percent abundance of the heaviest isotope is x
so here lightest isotope = 47 amu of 10 % ..........1
and heaviest isotope = 49 amu of x ................2
and middle isotope = 48 amu of 100 - 10 - x ........3
so
average mass = add equation 1 + 2 + 3
average mass = 10% ( 47) + x% ( 49) + (90 - x) % (48)
48.68 = 4.7 + 0.49 x + 43.2 - 0.48 x
x = 0.78
so percent abundance of the heaviest isotope is 78 %
True: when there is an angle between force and displacement,
Explanation:
The work done by a force when pushing/pulling an object is given by the equation
where
F is the magnitude of the force
d is the displacement of the object
is the angle between the direction of the force and of the displacement
We have two extreme cases:
- When the force is parallel to the displacement, then and , so the work done is maximum and simply becomes
- When the force is perpendicular to the displacement, then and , so the work done is zero.
Learn more about work:
brainly.com/question/6763771
brainly.com/question/6443626
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