Answer:
Option A is the correct answer.
Explanation:
The instantaneous acceleration = Change in velocity in velocity/Time taken
The slope of the graph should give instantaneous acceleration.
Slope of a graph = Change in value of Y -axis / Change in values of X -axis
Comparing both the equations
Change in value of Y -axis = Change in velocity in velocity
Change in values of X -axis = Time taken
So velocity values should be on the Y axis and Time values should be on the X axis.
Option A is the correct answer.
How does weight affect the time it takes an object to hit the ground?
The heavier the object the faster it will fall. The lighter the object the slower to fall. You can test this for example with a rock and a piece of paper. The paper will take more time to for it to hit the ground rather than the rock which will be quicker.
Final answer:
Weight does not affect the time it takes an object to hit the ground. In the absence of air resistance, all objects fall toward the center of the Earth with the same constant acceleration, regardless of their mass.
Explanation:
Weight does not affect the time it takes an object to hit the ground. According to Newton's second law of motion, the net force on a falling object is the gravitational force, also known as its weight. In the absence of air resistance, all objects fall toward the center of the Earth with the same constant acceleration, regardless of their mass. This means that objects with different weights will hit the ground at the same time as long as air resistance is negligible.
Suppose that a bobcat can jump to a height of 1.50 m. It jumps at an angle of 50.00 relative to the horizontal. What speed does the bobcat have to leave the ground in order to reach that height?
Answer: 7.08 m/s
let the bobcat jumps with speed [tex]u_o[/tex] at an angle 50 degrees relative to the horizontal.
Height to be reached, [tex]h=1.50 m[/tex]
The component of speed in horizontal direction: [tex]u_o cos 50^o[/tex]
The component of speed in vertical direction: [tex]u_o sin 50^o[/tex]
We will use equation of motion:
[tex] v^2-u^2=2as[/tex]
where v is the final velocity, u is the initial velocity, a is the acceleration, s is the displacement.
The instantaneous speed at the highest point would be 0. Hence, v=0.
The initial velocity in the vertical direction is [tex]u=u_o sin 50^o[/tex]
The acceleration would be due to gravity in the downward direction, [tex]a= -g[/tex]
The displacement would be the height reached, [tex]s=h=1.50 m[/tex]
Insert the values in the equation of motion:
[tex]\Rightarrow 0-(u_o sin50^o)^2=-2gh\\ \Rightarrow u_o^2=\frac{2\times 9.8 m/s^2 \times 1.50 m}{(sin 50^o)^2}=\frac{29.4m^2/s^2}{0.58}=50.1 m^2/s^2\\ \Rightarrow u_o=\sqrt{50.1m^2/s^2}=7.08m/s.[/tex]
Hence, the bobcat must leave the ground with the speed of 7.08 m/s at 50 degrees from the horizontal in order to reach the height of 1.50 m .
Which freshwater source is a permanent shallow body of water with plant life throughout?
Fresh water has a variety of different sources on Earth which includes rivers, lakes, streams, rain water, etc.
One of the fresh water sources is a Lagoon which is a permanent shallow body of water which is separated from the larger water bodies by a natural barrier such as reefs or islands.
Reportedly, almost 311 plant species are found to be grown in the Atanasovsko Lake lagoon, out of which the Marsh samphire, reed, vicia and sea wormwood are a few to name.
Answer:
The answer is b.Ponds
Explanation:
The statement “Harvard University is a better school than the University of Chicago” is an example of
a hypothesis.
gossip.
an opinion.
a fact.
Answer:
The correct answer will be option-an opinion.
Explanation:
An opinion represents the general view about something which is based on personal belief, views and judgments about that thing. The opinion is not based on any proved fact or previous knowledge.
Since in the given question which stated that Harvard university is better than the University of Chicago will represent a personal opinion about the universities as it is not based on proved and published facts. Due to this, the statement is considered an opinion.
Electromagnetic waves differ from the other types of waves because they are
Correct answer choice is :
B) Able to travel through a vacuum.
Explanation:
Electromagnetic waves are applied to carry long/short/FM wavelength radio waves, and TV/telephone/wireless signals or services. They are also effective for transferring energy in the form of microwaves, infrared radiation, visible light, ultraviolet light, X-rays, and gamma rays. Electromagnetic waves change from mechanical waves in that they do not need a medium to generate. This means that electromagnetic waves can move not only in the air and solid matters but also in the void of space.
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Answer:
Electromagnetic waves differ from the other types of waves because they are energy waves which do not require material medium for their propagation, and as such they travel through vacuum.
Explanation:
A wave can be either mechanical or electromagnetic.
Electromagnetic waves are those types of waves which do not require material medium for their propagation. While mechanical waves are those types of waves which require material medium for their propagation.
Electromagnetic waves differ from the other types of waves because they are energy waves which do not require material medium for their propagation, and as such they travel through vacuum.