Answer:
(D) 42.4N
Explanation:
Since the frame is at rest, the net force acting on it must be 0. There are three forces acting on it: the gravity and the opposing forces of the two cables.
Since the gravity is a vertical force, we are only interested in the vertical components of the remaining forces. The net force equation is
F_net = 0 = F_g -2 * F_y
The vertical force of one cable (using the information in the drawing) is:
F_y = 30N * sin 45 deg = 21.21N
Now the weight can be determined:
0 = F_g - 2 * F_y
F_g= 2 * F_y = 2 * 21.21N = 42.4N
The weight of the frame is about 42.4N.
Redox reactions involve the gain or loss of C. electrons
Unclear/incomplete question. However, I inferred you need an explanation of the phenomenon of rainfall.
<u>Explanation</u>:
Basically, the phenomenon of rainfall follows a natural cycle called the water cycle. What we call <em>'rainfall'</em> occurs when water condensed (in liquid form) in the atmosphere is made to fall down on the ground as tiny droplets as a result of the forces of gravity.
<u>The water cycle makes rainfall possible:</u>
- First, water on the earth's surface is evaporated (or is absorbed into) the atmosphere.
- Next, it then condensed into liquid form; which later falls to the surface to the ground again. And the process continues.
Atoms overcome the attractive forces between them through vaporization and sublimation .in vaporization the atoms are from gas to liquid while in sublimation it is from solid to gas which skips liquid state.through this the attractive force of the atoms does not meet in the liquid state because sublimation does not undergo in liquid phase. hope this help
Explanation:
Experiments needs to be as accurate and precise as possible. Accuracy and precision helps to keep errors within reasonable limits as they are unavoidable.
How do can we now obtain an accurate and precise result?
After checking that all sources of errors are kept at bay and the procedures perfectly matches the hypothesis being test, it is best to repeat the experiment a few number of times.
Repeating an experiment is scientifically permitted as it helps to eliminate error to a reasonable extent.
Repeating an experiment will also help to authenticate Mitchell's claim and provide a confidence limit to draw a sound conclusion from.
From the repeated results, some statistical parameters that further provide solid backing for the hypothesis being tested will surface.
One of the key attribute of a hypothesis to be acceptable as being valid is that it must be repeatable.
Learn more:
Experiment brainly.com/question/5096428
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