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HACTEHA [7]
3 years ago
7

Daniela is writing a report on the country of Australia, and she wants to tell how far Australia is from Florida, where she live

s.
Which of the following units of measure would be most appropriate for describing the distance between Florida and Australia?


A. kilometers

B. kilometers/second

C. light-years

D. meters
Physics
1 answer:
o-na [289]3 years ago
8 0

Answer:

A. kilometers

Explanation:

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Do all objects fall at the same rate?and if they do not why?
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5 0
3 years ago
If an object is thrown upward with an initial velocity of 128 ​ft/second, then its height after t seconds is given by the follow
IrinaK [193]

Answer:

The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

Explanation:

Given that,

Initial velocity u= 128 ft/sec

Equation of height

h = 128t-32t^2....(I)

(a). We need to calculate the maximum height

Firstly we need to calculate the time

\dfrac{dh}{dt}=0

From equation (I)

\dfrac{dh}{dt}=128-64t

128-64t=0

t=\dfrac{128}{64}

t=2\ sec

Now, for maximum height

Put the value of t in equation (I)

h =128\times2-32\times4

h=128\ ft

(b). The number of seconds it takes the object to hit the ground.

We know that, when the object reaches ground the height becomes zero

128t-32t^2=0

t(128-32t)=0

128=32t

t=4\ sec

Hence, The maximum height attained by the object and the number of seconds are 128 ft and 4 sec.

3 0
3 years ago
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