Well, it's up on top of a pole or pedestal of some sort,
so it has some gravitational potential energy relative to
the ground. In other words, if it somehow became detached
from its structure and fell to the ground, it would make quite
an energetic splat when it got there.
Also, the windmill is at the temperature of the air around it,
which is far from Absolute Zero, so the windmill holds a lot of
thermal (heat) energy.
Then I guess there's the matter of the chemical energy in the
molecules of the material that the windmill is made of, and the
nuclear energy in its atoms.
Answer:
g/cm³
Explanation:
From the question given above,
The y-axis is representing mass (g)
The x-axis is representing volume (cm³)
Unit of slope =?
Slope of a graph is simply defined as the change in y-axis divided by the change in x-axis. Mathematically it is expressed as:
Slope = change in y-axis (Δy)/change in x-axis (Δx)
Slope = Δy/Δx
Thus, with the above formula, we can obtain the unit used for measuring the slope as follow:
y-axis = mass (g)
x-axis = volume (cm³)
Slope =.?
Slope = Δy/Δx
Slope = mass (g) /volume (cm³)
Slope = g/cm³
Therefore, the derive unit used for measuring the slope is g/cm³
Answer:
Option b.
Explanation:
Weight of skydiver = mass × acceleration due to gravity
= 113 × 9.81 N
= 1108.53 N
Now,
The weight is acting downwards and air resistance is acting upwards. So,
Net force = weight - air resistance
Net force = 1108.53 - 660
Net force = 448.53
Closest value is option b.
r = 30m
v = 2.5 m/s
m = .02kg
_________________
v = r*omega
omega = (delta thaeda)/(delta time)
_________________
2.5 m/s = 30m*omega
.08333... = omega
_________________
*note, omega stands for angular velocity
__________________
Also, it's been a while since I've done a physics problem like this so I could be wrong. I think this is the answer though :)
