Answer:
Q = - 256 X 10⁻⁷ C .
Explanation:
Electric field due to a charge Q at a distance d from the center is given by the expression
E = k Q /d² Where k is a constant and it is equal to 9 x 10⁹
Put the given value in the equation
9 x 10² =
Q =
Q = - 256 X 10⁻⁷ C .
It will be negative in nature as the field is directed towards the center.
Answer:
130m
Explanation:
What we know:
- both tables have a mass of 29kg
- the gravitational force (F_g I'll call it) is a 4.24×10⁻¹⁰[N]
- G = 6.67×10⁻¹¹[m³/kg-s²]
- F_g = GMm/R²); where "M" and "m" are the two object's masses and "R" is the distance between them
With that information, all we need to do here is plug in the known values and then isolate "R" to find the distance between the two tables.
F_g = 4.24×10⁻¹⁰ = (6.67×10⁻¹¹)(29)(29)/R²
R = √[(6.67×10⁻¹¹)(29)(29)/4.24×10⁻¹⁰] = 132.2988...m = 130m
Answer: It is our need for company that urges us to make friends. So we make friends for companionship.
<u>Explanation:</u>
The kind of reward that we want from friendship is companionship.
- We make friends for a company. It is our need for a company that urges us to make friends.
- We enjoy when we have a friend. Life becomes relaxed.
- Our friend is our companion so we can easily share our problems with him or her.
The positive way that we can get this reward of companionship is
- Man is a social animal. He needs a company to live, otherwise, he cannot survive. So companionship satisfies our social needs.
- Human beings are emotional too. They need to share their feelings. So they can share it with their companion. We are emotionally satisfied.
Explanation:
The primary reason for this is efficiency. In most applications, a lower resistance means less power is converted to heat and lost to the surrounding environment and more of the supplied power gets to its intended destination.