3 years ago

Help pls it’s urgent

Physics

2 answers:

Igoryamba3 years ago

3 0

The wave length becomes shorter and the pitch becomes higher

Svetllana [295]3 years ago

3 0

The wavelength becomes shorter and the frequency gets higher.

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n a level football field a football is projected from ground level. It has speed 9.0 m/sm/s when it is at its maximum height. It

Pani-rosa [81]

Answer:

T = 0.225 s

Explanation:

The speed of a projectile at the highest point of its motion is the horizontal speed of the projectile. Considering the horizontal motion with negligible air resistance, we can use the following formula:

$v_x = RT\\\\T = \frac{v_x}{R}$

where,

T = Total time of ball in air = ?

R = Horizontal distance covered = 40 m

$v_x$ = horizontal speed = 9 m/s

Therefore,

$T = \frac{9\ m/s}{40\ m}$

T = 0.225 s

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Why does the spectroscopic parallax method only work for main sequence stars?.

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Newton is your answer.

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