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Vilka [71]
4 years ago
14

Adanna is watching waves on the sea go past two buoys. She knows the buoys are 20 metres apart.

Physics
2 answers:
Alexxx [7]4 years ago
8 0

Answer:

speed = distance/time

Explanation:

kotykmax [81]4 years ago
6 0
She can take watch and note down time for one cycle to pass
and then maths
speed = distance/ time
if u have any doubts ask me
please mark as brainliest
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Considerable scientific work is currently under way to determine whether weak oscillating magnetic fields such as those found ne
slega [8]

Answer:

\epsilon = 2.96 \times 10^{-11} \ V

Explanation:

given,

magnetic field strength =  1.40 ✕ 10⁻³ T

frequency of oscillation = 60 Hz

diameter of RBC = 7.5 μm

EMF = ?

\epsilon = NBA\omega

\epsilon = NB(\pi\ r^2)\ (2\pi f)

\epsilon = NB(\pi\ (\dfrac{d}{2})^2)\ (2\pi f)

\epsilon = (1)\ 1.4 \times 10^{-3}(\pi\ (\dfrac{7.5 \times 10^{-6}}{2})^2)\ (2\pi\times 60)

\epsilon = 2.96 \times 10^{-11} \ V

maximum emf that can generate around the perimeter of the cell \epsilon = 2.96 \times 10^{-11} \ V

5 0
3 years ago
What is the most effective means of establishing awareness of hazards in commercial, industrial, and storage facilities with lar
coldgirl [10]

Answer:

C: Contacting the facilities.

7 0
3 years ago
For sprinters running at 12 m/s around a curved track of radius 26 m, how much greater (as a percentage) is the average total fo
Snezhnost [94]

Answer:

114.86%

Explanation:

In both cases, there is a vertical force equal to the sprinter's weight:

Fy = mg

When running in a circle, there is an additional centripetal force:

Fx = mv²/r

The net force is found with Pythagorean theorem:

F² = Fx² + Fy²

F² = (mv²/r)² + (mg)²

F² = m² ((v²/r)² + g²)

F = m √((v²/r)² + g²)

Compared to just the vertical force:

F / Fy

m √((v²/r)² + g²) / mg

√((v²/r)² + g²) / g

Given v = 12 m/s, r = 26 m, and g = 9.8 m/s²:

√((12²/26)² + 9.8²) / 9.8

1.1486

The force is about 114.86% greater (round as needed).

5 0
3 years ago
PLEASE ANSWER THIS ASAP!!!
Burka [1]

Answer:

I guess B

Explanation:

Because it stop by it self so that is digital

5 0
2 years ago
The speed at which the package hits the ground is really fast! If a package hits the ground at such a speed, it can be crushed a
Fed [463]

Answer:

B. Decrease the plane’s speed and height

Explanation:

Decrease in speed of plane:

When the speed of the plane is decreased then initial velocity of the package will be lesser. As a result, final velocity will also be lesser because in this case final velocity depends upon the initial velocity.

Decrease in height:

According to law of conservation of energy:

Loss in potential energy = Gain in Kinetic energy  

                                 mgh = ½ mV^2

It means with the decrease in height less potential energy will be converted to kinetic energy. As package has constant mass so it will gain less velocity.

7 0
4 years ago
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