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4 years ago

What allows for the investigation of a variable? Can someone help please.

Physics

2 answers:

ladessa [460]4 years ago

5 0

The answer is C: Experiment

nevsk [136]4 years ago

3 0

Answer: Experiment

Explanation: If you want to study a variable you should do small changes and observe how the variable changes.

This process is called an experiment, where the investigator does small changes and tries to understand how these changes affect the variable. Trying to create a model that describes the variable.

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The fastest recorded pitch in Major League Baseball was thrown by Nolan Ryan in 1974. If this pitch were thrown horizontally, th

8_murik_8 [283]

Answer:

45.06053 m/s

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

g = Acceleration due to gravity = 9.81 m/s²

a = Acceleration

$s=ut+\frac{1}{2}at^2\\\Rightarrow 0.809=0t+\frac{1}{2}\times 9.81\times t^2\\\Rightarrow t=\sqrt{\frac{0.809\times 2}{9.81}}\\\Rightarrow t=0.406\ s$

Time taken by the ball in the horizontal plane

Time = Distance / Speed

$t=\frac{18.3}{u}$

$s=\frac{1}{2}gt^2\\\Rightarrow 18.3=\frac{1}{2}\times 9.81\times \left(\frac{18.3}{u}\right)^2\\\Rightarrow u=\sqrt{\frac{1}{2}\times 9.81\times \frac{18.3^2}{0.809}}\\\Rightarrow u=45.06053\ m/s$

The Speed of the ball was 45.06053 m/s

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