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dusya [7]
4 years ago
11

Give me two situations where a plane or a helicopter would be needed(Ex: transport passengers on a mountain DO NOT USE THAT EXAM

PLE). Then write the better choice(either plane or helicopter) for that situation and give the advantage and disadvantage for your choice.
Physics
2 answers:
kifflom [539]4 years ago
8 0
To save some one from an burning sky skyscraper. plane would burn and would not be very good choice but the plane could still store a lot of people in it as if a helicopter would only be able to store a few
bazaltina [42]4 years ago
3 0
Rescue someone from a huge fire, hurricane, earthquake, transport someone one really sick, someone going into surgery.
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5. Based on the data collected by the students, what is the tangential velocity of
malfutka [58]

The tangential velocity of the ball is 0.63 m/s.

<h3>What is tangential speed?</h3>

Tangential speed is the linear component of the speed of any object moving along a circular path.

v = ωr

where;

  • v is the tangential speed
  • ω is the angular speed (rad/s)
  • r is the radius of the circle

At a given radius of the circle = 0.3 m

Let the number of revolution per min = 20 rev/min

\omega = 20 \frac{rev}{\min} \times \frac{2\pi \ rad}{1 \ rev} \times \frac{1 \min}{60 \ s} = 2.1 \ rad/s

v = ωr

v = 2.1 x 0.3

v = 0.63 m/s

Thus, the tangential velocity of the ball is 0.63 m/s.

Learn more about tangential velocity here: brainly.com/question/25780931

8 0
2 years ago
you walk forward 10 meters, backwards 5 meters, and then 10 meters forwards in 15 seconds. What is your velocity FORWARDS in m/s
nata0808 [166]
Your velocity forward in would be 1.66 m/s. to solve you would use the velocity equation.
8 0
3 years ago
In a transformer, energy is carried from the primary coil to the secondary coil by:________
likoan [24]

In a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.

To find the answer, we have to know more about the transformer.

<h3>How transformer works?</h3>
  • An item utilized in the transfer of electric energy is a transformer.
  • AC current is used for transmission.
  • It is frequently used to modify the supply voltage between circuits without altering the AC frequency.
  • The fundamentals of mutual and electromagnetic induction govern how the transformer operates.
  • Magnetic field through the primary coil changes when primary coil current varies. the iron core of the secondary coil likewise has a magnetic field.
  • EMF is therefore generated in the secondary coil.

Thus, we can conclude that, in a transformer, energy is carried from the primary coil to the secondary coil by magnetic field in the iron core.

Learn more about the transformer here:

brainly.com/question/26787198

#SPJ4

5 0
2 years ago
A 910-kg object is released from rest at an altitude of 1200 km above the north pole of the Earth. If we ignore atmospheric fric
gayaneshka [121]

In order to develop this problem it is necessary to use the concepts related to the conservation of both potential cinematic as gravitational energy,

KE = \fract{1}{2}mv^2

PE = GMm(\frac{1}{r_1}-(\frac{1}{r_2}))

Where,

M = Mass of Earth

m = Mass of Object

v = Velocity

r = Radius

G = Gravitational universal constant

Our values are given as,

m = 910 Kg

r_1 = 1200 + 6371 km = 7571km

r_2 = 6371 km,

Replacing we have,

\frac{1}{2} mv^2 =  -GMm(\frac{1}{r_1}-\frac{1}{r_2})

v^2 =  -2GM(\frac{1}{r_1}-\frac{1}{r_2})

v^2 = -2*(6.673 *10^-11)(5.98 *10^24) (\frac{1}{(7.571 *10^6)} -\frac{1}{(6.371 *10^6)})

v = 4456 m/s

Therefore the speed of the object when striking the surface of earth is 4456 m/s

3 0
4 years ago
Please select the word from the list that best fits the definition
Mandarinka [93]

Black coaches now lead 50% of National Basketball Association teams

It's been a transformative year for the NBA when it comes to diversity within the coaching ranks. In the last 12 months, eight coaching jobs have been filled by Black candidates.

<h3><em>SOOOOO THE ANSWER IS ACRONYMIC SENTENCE IM 99.99% SURE</em></h3>

4 0
2 years ago
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