<span>Copper is a good conductor of electricity because its atoms have a loosely held electron in their outer shell that is able to move freely to other atoms.</span>
Answer:
Explanation:
Potential energy at the surface
= -GMm / R
= -6.6 x 10⁻¹¹ x 6 x 10²³ m / 3400 x 10³
= -1.1647 x 10⁷ m
If v be required velocity
Total energy at surface
= 1/2 m v² -1.1647 x 10⁷ m
= energy at farr off = 1/2 m x 3000²
1/2 m v² - -1.1647 x 10⁷ m = 1/2 m x 9 x 10⁶
1/2 v²= 1.1647 x 10⁷ + .45 x 10⁷
= 1.6147 x 10⁷
v² = 2.3303 x 10⁷
v = 4.827 x 10³ m / s
b ) For final speed zero at infinity
1/2 m v² - -1.1647 x 10⁷ m = 0
1/2 v² = 1.1647 x 10⁷
v² = 2.3294 x 10⁷
v = 4.826 x 10³ m /s
Answer:
5.672/s^2 is his acceleration
Explanation:
1 minute is equal to 60 seconds. Take that and divide 340.3 by that.
A pure substance is chemically combined
Therefore a compound is a pure substance because it cant be broken down physically
All elements are pure substances, along with tin, diamond, and etc...
Answer:
30 seconds ahead.
Explanation:
Its about 90% of the decisions which are made by someone while driving based on what they see. The vision must be good to make the decision accurately and timely before reacting to the environment.
Line of sight is define as the view which you can see without any obstruction. The best condition of proper line of sight is that someone is needed to see in all direction front, behind, left and right.
To establish the clean line of sight the person should search the traffic environment about 30 seconds ahead.
