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Alex777 [14]
4 years ago
14

In order to be considered scientific, evidence must be:

Physics
1 answer:
zhenek [66]4 years ago
7 0
Reviewed by many sources. for example, it must be reviewed by scientist too
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A ball is thrown upward from a height of 432 feet above the​ ground, with an initial velocity of 96 feet per second. From physic
e-lub [12.9K]

Answer;

A)S(t)=96t-16t² +432

B)it will take 9 seconds for the ball to reach the ground.

C)864feet

Explanation:

We were given an initial height of 432 feet.

And v(t)= 96-32t

A) we are to Find​ s(t), the function giving the height of the ball at time t

The position, or heigth, is the integrative of the velocity. So

S(t)= ∫(96-32)dt

S(t)=96t-16t² +K

S(t)=96t-16t² +432

In which the constant of integration K is the initial height, so K= 432

b) we need to know how long will the ball take to reach the​ ground

This is t when S(t)= 0

S(t)=96t-16t² +432

-16t² +96t +432=0

This is quadratic equation, if you solve using factorization method we have

t= -3 or t= 9

Therefore, , t is the instant of time and it must be a positive value.

So it will take 9 seconds for the ball to reach the ground.

C)V=s/t

Velocity= distance/ time

=96=s/9sec

S=96×9

=864feet

8 0
3 years ago
Rounded to the nearest whole number what is the atomic mass of platinum?
NISA [10]

195 is the rounded atomic atomic mass of platinum

6 0
3 years ago
A cylinder of gas at room temperature has a pressure . To p_{1} what temperature in degrees Celsius would the temperature have t
grandymaker [24]

In order to calculate the temperature, we need to know that temperature and pressure are directly proportional, that is, if the pressure increases, the temperature (in Kelvin) also increases in the same proportion.

So, first let's convert the temperature from Celsius to Kelvin, by adding 273 units:

\begin{gathered} K=C+273 \\ K=20+273 \\ K=293 \end{gathered}

Then, let's calculate the proportion:

\begin{gathered} \frac{P_1}{T_1}=\frac{P_2}{T_2} \\ \frac{p_1}{293}=\frac{1.5p_1}{T_2} \\ \frac{1}{293}=\frac{1.5}{T_2} \\ T_2=1.5\cdot293 \\ T_2=439.5\text{ K} \end{gathered}

Now, converting back to Celsius, we have:

\begin{gathered} C=K-273 \\ C=439.5-273 \\ C=166.5\text{ \degree{}C} \end{gathered}

So the temperature would be 166.5 °C.

6 0
1 year ago
A new car manufacturer advertises they their car can go from zero to sixty in 8 seconds. This is a description of
Svetllana [295]
The acceleration.  The units of acceleration in this case are \frac{miles}{ hours^{2} }
When we multiply that by time (8 seconds, or 0.0022hrs in this case) our units are then miles per hour.
6 0
3 years ago
What is the difference between a mechanical wave and a non-mechanical wave?.
Sloan [31]

Answer:

Mechanical waves are waves that need a medium for propagation. Non-mechanical waves are waves that do not need a medium for propagation.

Explanation:

I hope its helped thank you !! ( don't report my asnwer just delete it ) brainlest pls if u can

8 0
3 years ago
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