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3 years ago

11

You want to calculate how long it takes a ball to fall to the ground from a height of 20 m. Which equation can you use to calcul

ate the time? (Assume no air resistance.)

1 answer:

fomenos3 years ago

8 0

Answer:it’s B.

Because it’s said in the fhoto

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The center of gravity of an ax is on the centerline of the handle, close to the head. Assume you saw across the handle through t

andrew-mc [135]

Answer:

I believe it is they will weigh the same

Explanation:

Center of gravity is the axis on which the mass rotates evenly if I remember correctly from AP Physics

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3 years ago

Are Constellations based on the magnitude of stars.

Nikolay [14]

Constellations are based off of many Greek and Roman fables. Many of their gods and beliefs are pictured in the stars, which is where we get most of our constellations. Hope this helps!

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3 years ago

Read 2 more answers

The equation y = 5 Sin (3x - 4t), where

igomit [66]

Answer:

Frequency, f = 0.63 Hz

Period, T = 1.58 s

Speed of a wave, v = 1.34 m/s

Explanation:

The equation of a wave is given by :

$y = 5 \sin (3x - 4t)$ ...(1)

y is in mm

x is in meters

t is in seconds

The general equation of a wave is given by :

$y=A\sin(kx-\omega t)$ ...(2)

(i) Compare equation (1) and (2) we get :

$k=3\\\\\omega=4$

Since,

$\omega=2\pi f\\\\f=\dfrac{\omega}{2\pi}\\\\f=\dfrac{4}{2\pi}\\\\f=0.63\ Hz$

(ii) Period of wave is :

$T=\dfrac{1}{f}\\\\T=\dfrac{1}{0.63}\\\\T=1.58\ s$

(iii) Speed of a wave,

$v=\dfrac{\omega}{k}\\\\v=\dfrac{4}{3}\\\\v=1.34\ m/s$

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2 years ago

Let’s take the case of the 4-kg block with an initial velocity of 10 m/s that is colliding with a 6-kg block that is stationary.

Aleksandr [31]

Answer:

6kg ise yes...............

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1 year ago

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What do bats, dolphin, and whale use to determine their location?

Flura [38]

C. Echolocation

Echolocating animals emit calls out to the environment and listen to the echoes of those calls that return from various objects near them. They use these echoes to locate and identify the objects.

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3 years ago