<span>This is the jet stream. This air current flows from west to east along a typically-meandering path that is often used as a predictor of weather conditions. These currents are typically formed from the fact that the equator is warmer than the poles, and this allows the different-density air masses to develop an eastward-moving component.</span>
L = r x p = rmv = mr²ω
L = 0.25 x 0.75² x 12.5 = 1.758
Answer:
407 steps
Explanation:
From the question,
P = mgh/t........... Equation 1
Where P = power, m = mass, g = acceleration due to gravity, h = height, t = time.
Make h the subject of the equation
h = Pt/mg............. Equation 2
Given: P = 746 W, t = 1 minute = 60 seconds, m = 70 kg.
Constant: g = 9.8 m/s²
Substitute into equation 2
h = 746(60)/(70×9.8)
h = 44760/686
h = 65.25 m
h = 6525 cm
number of steps = 6525/16
number of steps = 407 steps
Answer: B - Sphere A is negative and sphere B is positive because electrons from sphere B are attracted to the rod and move to sphere A.
Explanation:
The rod is positively charged which means that it will repel positive charges (protons) and the rod will attract negative charges (electrons)
If you look at all the options that are given each one of them has a flaw, lets look at them one by one for better understanding of the concept:
(A) Sphere A is negative and sphere B is positive because protons from sphere A are attracted to the rod and move to sphere B.
-Incorrect because protons which carry a positive charge CANNOT be attracted by the rod because as by the diagram the rod is also positively charged
(C) Sphere A is positive and sphere B is negative because electrons from the rod move to sphere B and protons then move to sphere A.’
Incorrect because sphere B has protons and not electrons as we can see it in the diagram given below.
(D) Sphere A is positive and sphere B is negative because protons move from sphere B to the rod and also to sphere A.
Incorrect because protons cannot move from sphere B to the rod since the rod is positively charged and like charges always repel.
