Frequency refers to the number of wavelengths that pass a fixed point in a minute. true or false
Answer:True
Answer:
<em>The object could fall from six times the original height and still be safe</em>
Explanation:
<u>Free Falling</u>
When an object is released from rest in free air (no friction), the motion is completely dependant on the acceleration of gravity g.
If we drop an object of mass m near the Earth surface from a height h, it has initial mechanical energy of
When the object strikes the ground, all the mechanical energy (only potential energy) becomes into kinetic energy
Where v is the speed just before hitting the ground
If we know the speed v is safe for the integrity of the object, then we can know the height it was dropped from
Solving for h
If the drop had occurred in the Moon, then
Where hM, vM and gM are the corresponding parameters on the Moon. We know v is the safe hitting speed and the gravitational acceleration on the Moon is g_M=1/6 g
This means the object could fall from six times the original height and still be safe
Answer:
When force and displacement are in the same direction, the work performed on an object is said to be positive work. Example: When a body moves on the horizontal surface, force and displacement act in the forward path. The work is done in this case known as Positive work.
Explanation:
Hope this helps you
To obtain an acceleration northward is necessary than the west component of the first cable and the east component of the second cable be equal, otherwise the barge will head northwest or northeast.
So for the first cable the component to west is:
Fw = F1 * cos (30Âş) = 80*cos(30Âş)
And for the second cable the component to east is:
Fe = F2 * cos (20Âş) = F2*cos(20Âş)
Then to get a movement northward we need than Fw = Fe, so:
80*cos(30Âş) = F2*cos(20Âş)
F2 = 80*cos(30Âş)/cos(20Âş)
F2 = 73.73 N So the magnitude of the east cable should be 73.73 Newtons
The highest trophic level has the least available energy in kilojoules.
Even though the food web is not shown in the question, but we know that energy decreases steadily as it is passed on from one trophic level to the next according to the second law of thermodynamics.
Energy enters into the system from the sun. The primary producers utilize this energy to produce food. As plants are eaten by animals, this energy is transferred along the food web an diminishes at each higher trophic level.
At the highest trophic level, the the least available energy in kilojoules in this food web is found.
Learn more: brainly.com/question/2233704
