Building with magnet blocks
To determine the mass of gold dissolved in oceans, we must first know the volume of the ocean in liters. To determine its volume, we multiply the area and the depth taking note of the consistency of units. The volume would be 1.38 x 10^18 cubic meters or 1.38x10^21 liters. Then,multiplying this to the concentration, the answer would be 8 x 10^12 grams or 8 billion kg.
Answer:
The magnitude of charge on each sphere is .
Explanation:
Given that,
Force of repulsion between the charges, F = 22 mN
The distance between spheres, r = 16 mm = 0.016 m
It is mentioned that both the spheres carry equal charges. The force between charges is given by :
So, the magnitude of charge on each sphere is . Hence, this is the required solution.
It is absolutely true that when the velocity of an object
changes, the momentum of the object also change. Momentum of any object is
defined as the multiple of velocity of an object and the mass of the object. So
we can easily deduce that momentum is directly proportional to velocity of an object
if the mass of the object remains constant. So it can be seen that if the mass
of the object does not change then any change in velocity is bound to have an
effect on the momentum of the object. We can easily write the equation as
momentum= mass x velocity.
Answer:
0.2695 N/m
Explanation:
Applying,
F = ke................. Equation 1
Where F = Force on the spring, k = spring constant, e = extension.
make k the subject of the equation
k = F/e............ Equation 2
But,
F = mg................. Equation 3
Where m = mass, g = acceleration due to gravity
Substitute equation 3 into equation 2
k = mg/e................... Equation 4
From the question,
Given: m = 55 g = 0.055 kg, e = 2 m
Constant: g = 9.8 m/s²
Substitute these values into equation 4
k = (0.055×9.8)/2
k = 0.2695 N/m