I might be wrong, but. The words seem to fit.

When a hypothesis is wrong, scientists often begin by revising the question after that, its common for scientists to redesign the experiment.

7 0

4 years ago

Read 2 more answers

A track star in the broad jump goes into the jump at 12 m/s and launches himself at 20° above the horizontal. How long is he in

emmainna [20.7K]

Explanation:

It is given that,

Initial speed of the broad jump, u = 12 m/s

It is launched at an angle of 20 degrees above the horizontal. Let t is the time for which the track star i in the air before returning to Earth. The motion of the track star in the broad jump can be treat as the projectile motion. The time of flight of the projectile is given by :

$t=\dfrac{2u\ sin\theta}{g}$

Putting all the values in above equation as :

$t=\dfrac{2\times 12\times \ sin(20)}{9.8}$

t = 0.837 seconds

So, the time for which the track star is in air is 0.837 seconds. Hence, this is the required solution.

3 0

3 years ago

Which of the following has been identified as one of the seven basic emotions that are present as early as infancy?

Irina-Kira [14]

The answer is c. interest.

4 0

3 years ago