Correct answer is:
<span>B. Subtract the initial velocity from the final velocity and divide the result by the time
In fact, the formula to calculate the acceleration is
</span>
<span>where vf is the final velocity, vi the initial velocity, and t the time.</span>
If you neglect air resistance, then you can solve for the horizontal distance using the formula:
dx=vixt
Where:
dx = horizontal distance
vix = initial horizontal velocity
t = time in flight
Now you can see that you have all the given you need.
vix= 2km/h
t = 0.25 hours
We use hours because you need the units to be the same. So just plug that in your equation and you will have your answer:
dx = vixt
=(2km/h)(0.25h)
=0.5km
This means that the answer to your question is B.
Answer:
145 degree
Explanation:
We are given that
Magnetic field=B=2 T
Charge on particle,q=
Velocity, v=
Angle,
We have to find the direction of the force exerted on this particle by magnetic field with magnitude 2 T in the z direction.
Component of velocity along x- axis
Along y- axis
Hence, the direction of force =145 degree
A grandfather paradox is a situation where individual travels to the past and then introduces a change which affects or contradicts the present.
<h3>What is a grandfather paradox?</h3>
A paradox is a situation or statement which involves two contradictions.
A grandfather paradox is a situation which is defined by the ability of an individual to travel to a time in the past usually before the birth of their grandfather and then introduces a change which affects or contradicts the present. For example, killing the grandfather to prevent their birth.
In conclusion, a grandfather paradox is is an event which contradicts the present as a result of a change done to the past.
Learn more about a grandfather paradox at: brainly.com/question/8707309
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Answer:
A. Theory
Explanation:
The scientific method consists of following six steps:
1. Observation 4. Prediction
2. Experiment 5. Hypothesis
3. Law 6. Theory
1. Observation:
Observations are taken carefully and systematically. In this way all possible information is gathered
about physical phenomenon.
2. Hypothesis:
Keeping these observations in mind scientist makes some postulates to explain the phenomenon. These postulates are called hypothesis.
3. Theory:
Scientist design a theory on the basis of hypothesis and gives an elaborated explanation about the phenomenon.
4. Prediction:
Sometimes a scientist presents a theory on the basis rational reasoning and predicts some phenomenon to take place under certain conditions.
5. Experiment:
The theory or prediction is tested by experiments. If the theoretical and experimental results agree with each other, the theory is accepted otherwise it is discarded.
6. Law:
A theory which is tested again and again and found to fit the facts and from which valid predictions are maybe made are known as ‘Law’.
So it is clear from the given explanation that the term, which best describes the phrase ""a description of what happens in nature" is:
<u>A. Theory</u>