Here we know that mass of the person is 90 kg
His weight is given as 30 lbf
so here we can convert it into Newton as we know that
1 lbf = 4.45 N
Now from above conversion
now we can use this to find the gravity at this height
now we know that with height gravity varies as
so above is the height from the surface of earth
Answer:
If an object has a high density then the molicules making up that object are closly packed togeather. Because of this, objects with a higher density will have more mass than objects of the same size that have a lesser density.
Answer:
a) 3.74 circumference of earth
b)1.67× 10⁻⁸ sec
Explanation:
a) given,
time = 0.5 second
distance = speed × time
= 3 x 10⁸ × 0.5
= 1.5 × 10⁸ m
circumference of earth = 40075 km
= 4.01 × 10⁷m
distance with respect to circumference=
= 3.74 circumference of earth
b) distance = 5 m
time =
=
= 1.67× 10⁻⁸ sec
Electric field due to a single point charge at the center of the square is given as E = 2 N/C
Now we place three identical charges on rest of the corners
So the electric field at the center will be due to all four charges will be of same magnitude
but the direction of all four charges electric field be like they all cancel the field of its opposite charge
So here due to vector property of the charges we can say that the electric field of all four charges will cancel each other and net field due to all four charges at center will be ZERO
so correct answer will be
<em>b. The magnitude of the net electric field at the center of the square is 0 N/C.</em>
43 because the atomic number tells us how many protons there are in an atom.
