Geologists cannot yet predict earthquakes because

Answers

Answer 1

Answer: Geologists cannot yet predict earthquakes because the earthquakes caused by the movement of plates do not have the precise time and place when will it moves.

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Which term describes the time it takes for an object to complete one full cycle of motion on a spring?

Answers

The term period (symbol: T) describes the time it takes for an object to complete one full cycle of motion on a spring.

The formula for time is: T = 1 / f , where f is the frequency , f= c / λ = wave speed c (m/s) / wavelength λ (m)..

The formula describes that as the frequency of a wave increases, the time period of the wave decreases.

There is no correct choice on the list you provided.

That time is called the "period" of the motion

A plane flies 300km in 3 hrs. What is
the rate of the plane?

Answers

the plane is on a average of 100km a hour

Answer:

on average, the plane is traveling at 100km per hour, so i think the rate is 100:1

Explanation:

A charge of 8.5 × 10–6 C is in an electric field that has a strength of 3.2 × 105 N/C. What is the electric force acting on the charge?

Answers

ok
here is your anwer
O hope it is useful for you

Answer:

2.7N

Explanation:

Cliff divers at Acapulco jump into the sea from a cliff $30.7 m$ high. At the level of the sea, a rock sticks out a horizontal distance of $9.34 m$.The acceleration of gravity is $9.8 m / s ^{2}$.
With what minimum horizontal velocity must the cliff divers leave the top of the cliff if they are to miss the rock?
Answer in units of $m / s$.

Answers

Answer:

To solve this problem, we can use the kinematic equation for horizontal motion, which relates the initial velocity ($v_{0}$), final velocity ($v_{f}$), acceleration ($a$), and displacement ($d$) of an object:

$d = v_{0} t + \frac{1}{2}at^{2}$

In this case, we want to find the minimum initial velocity ($v_{0}$) that the divers must have to clear the rock. To do this, we can assume that the divers just graze the rock at the start of their trajectory, so the displacement in the horizontal direction is equal to the distance from the cliff to the rock ($d = 9.34 m$). We also know that the acceleration in the horizontal direction is zero, so the only force acting on the divers is gravity in the vertical direction, which gives an acceleration of $a = 9.8 m/s^{2}$.

At the instant the divers leave the cliff, they have zero horizontal velocity, so $v_{0} = 0$. We can use the equation above to solve for the time it takes for the divers to fall from the cliff to the level of the rock:

$d = \frac{1}{2}at^{2} \Rightarrow t = \sqrt{\frac{2d}{a}}$

Plugging in the numbers, we get:

$t = \sqrt{\frac{2(9.34 m)}{9.8 m/s^{2}}} \approx 1.44 s$

Since the cliff divers want to clear the rock, they need to travel a horizontal distance of at least $9.34 m$ during this time. We can use the equation for horizontal motion again to solve for the minimum initial velocity:

$d = v_{0}t \Rightarrow v_{0} = \frac{d}{t} = \frac{9.34 m}{1.44 s} \approx 6.49 m/s$

Therefore, the minimum horizontal velocity that the cliff divers must have to clear the rock is approximately $6.49 m/s$.

The hardest known natural material is _____.

Answers

I hope I am not to late but diamond is the hardest

The hardest known natural material is diamond!!! Good luck :)

Yello light on a red object, the object appears what color ?

Answers

In order to understand what happens, let's consider for a moment why
it's called a "red object" to begin with. The reason it's called "red" is that
whenever the light shining on it contains any red light, the object absorbs
light of any other colors, and only red light remains to bounce off of it toward
your eyes. Since most light contains plenty of red ... such as sunlight or the
light from an electric bulb ... the object usually looks red when you see it.

In the rare event when the light illuminating it has no red in it ... such as the
situation you describe in your question ... no light remains to bounce off of
the object to your eyes, since the object absorbs any light that's not red.

When that happens, the object appears black.

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