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ra1l [238]
3 years ago
9

Conditional probability involves events that are independent. true or false?

Physics
1 answer:
kiruha [24]3 years ago
3 0
Its false I got It right .


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A box falls out of a stationary helicopter hovering 135 m above the ground. How long will it take to hit the ground?
Marrrta [24]

We have the equation of motion s = ut + \frac{1}{2} at^2, where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.

Here displacement = 135 m, Initial velocity = 0 m/s, acceleration = 9.81 m/s^2

Substituting

   135 = 0*t+\frac{1}{2} *9.8*t^2\\ \\ 4.9t^2 =135\\ \\ t =5.25 seconds

A box falls out of a stationary helicopter hovering 135 m above the ground will take 5.25 seconds to reach the ground.

4 0
3 years ago
Question 2
yarga [219]

Answer:

24.4 m

Explanation:

first we have to calculate how long the cat will be in the air, in vertical direction this is free fall from 4m (poor cat, hope he survived) with acceleration of g=9.81 m/s^2

time = sqrt ( 2 * height / g)

time = sqrt (2 * 4 / 9.81)

time = 0,903 s

then we know his horizontal flight was 22 m long, so ve can calculate verical speed

speed = length / time

speed = 22 m / 0,903 s

speed = 24.363 m

as you are asked to give 3 significant numbers answer is 24,4 m

8 0
2 years ago
Doe the baby diaper tabs go to the front or back. Huggies diaper.
Zielflug [23.3K]

Answer:

back lol

Explanation:

Pull the tabs and wrap around to stick to the front of the diaper:)

3 0
3 years ago
Read 2 more answers
What are the three types of mechanical waves?
Black_prince [1.1K]

Answer:

I'm sure its transverse, longitudinal and surface

Explanation:

sorry if I'm wrong

4 0
2 years ago
Which statement about ocean surface currents is false?
Alla [95]

A) they have no effect on air temperature over land on the coast is False

Explanation:

  • warm and cold ocean currents can influence the coastal areas only when the air is blown into the land from the sea.
  • the temperature over the land increases when warm ocean currents heat the air above the ocean.
  • the temperature over the land decreases when cold ocean currents cool the air above the ocean and can bring colder winds to the coastal regions.
  • so, ocean currents play a major role in regulating the air temperature over land on the coastal region.

4 0
3 years ago
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