Answer:
s = 400 ft
The maximum height reached by the ball is 400 ft
Explanation:
Given;
Initial vertical velocity v = 160 ft/s
Height function s = 160t - 16t^2 ......1
The maximum height is reached when the change in height with respect to time is zero.
ds/dt = 0
Differentiating the height function;
ds/dt = 160 - 32t = 0
160 - 32t = 0
Solving for t;
32t = 160
t = 160/32
t = 5 seconds
Therefore, the maximum height is at t = 5;
Substituting into equation 1 (the height function)
s = 160(5) - 16(5^2)
s = 800 - 400
s = 400 ft
The maximum height reached by the ball is 400 ft
A statement which best describes the data is that: C. they are precise and reproducible.
<h3>What is an experiment?</h3>
An experiment can be defined as a scientific investigation which typically involves the process of manipulating an independent variable (the cause), so as to determine or measure the dependent variable (the effect).
<h3>What is data?</h3>
Data can be defined as a representation of instructions or factual information in a formalized manner, especially as a series of binary digits (bits) or samples that are used by scientist in an experiment or research.
<h3>The types of data.</h3>
Generally, there are two (2) main types of data and these include:
Based on the data provided in the table (see attachment), we can infer and logically deduce that a statement which best describes the data is that they are precise and reproducible.
Read more on experiments here: brainly.com/question/25322325
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Complete Question:
Which statement best describes the data?
A. They are accurate and reproducible.
B. They are accurate but not reproducible.
C. They are precise and reproducible.
D. They are precise but not reproducible.
Fe=k|q1q2| / r^2
(k is the electrostatic constant which has a value of 8.99x10^9 Nm^2/c^2, r is the distance between the charges and q is the quantity of the charges.)
The part B of the question is missing and it is;
b) What is the height between the two window ledges?
Answer:
A) 20.76 m/s
B) 161.52 m
Explanation:
A) To calculate the initial speed we use the formula from Newton's first law of motion:
v = u + at
Making u the subject gives;
u = v - at
Where;
v is the final velocity which is the speed when Jill sees the pot = 60 m/s
u is the initial velocity which is the speed when Jack sees the pot go by
t is the time between the two observed events = 4 s
a in this question is acceleration due to gravity = 9.81 m/s².
Plugging in the relevant values into the initial velocity equation gives;
u = 60 - (9.81 × 4)
u = 20.76 m/s
B) To get the height difference, we will use the formula;
(y1 - y0) = ut + ½at²
Thus, plugging in the relevant values, we have;
y1 - y0 = (20.76 × 4) + (½ × 9.81 × 4²)
(y1 - y0) = 161.52 m
