a plane is flying due east in still air at 395 km/h. suddenly, the plane is hit by wind blowing at 55km/h toward the west. what is the resultant velocity of the plane

Answers

Answer 1

Answer: Let's be clear: The plane's "395 km/hr" is speed relative to the
air, and the wind's "55 km/hr" is speed relative to the ground.

Before the wind hits, the plane moves east at 395 km/hr relative
to both the air AND the ground.

After the wind hits, the plane still maintains the same air-speed.
That is, its velocity relative to the air is still 395 km/hr east.
But the wind vector is added to the air-speed vector, and the
plane's velocity relative to the ground drops to 340 km/hr east.

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A snail travels at a rate of 2.37 feet per minute. a. Write a rule to describe the function. b. How far will the snail travel in 6 minutes?

Answers

a.
distance = rate*time
d = 2.37t

b.
d = 2.37*6 = 14.22 ft

Answer:

Explanation:

A stone thrown from a height of 5.72 meters hits the ground at 13.3, Calculate the initial speed. Neglect air resistance

Answers

Answer:

12.31618 m/s

Explanation:

s = Displacement

t = Time taken

g = Acceleration due to gravity = 9.81 m/s² = a

$s=ut+(1)/(2)at^2\n\Rightarrow 5.72=0t+(1)/(2)* 9.81* t^2\n\Rightarrow t=\sqrt{(5.72* 2)/(9.81)}\n\Rightarrow t=1.07988\ s$

Velocity is given by

$v=(s)/(t)\n\Rightarrow v=(13.3)/(1.07988)\n\Rightarrow v=12.31618\ m/s$

The initial velocity is 12.31618 m/s

Use newton's first law of motion to explain why you feel tossed around whenever a roller coaster goes over a hill or through a loop.

Answers

Newton's first law states that an object at rest will stay at rest && an object in motion will remain in motion unless acted on by another force. With that being said you feel tossed around because you are initially at rest but when you ride the roller coaster you take it's course of motion.

Hoped this helped!

Explanation:

A roller coaster is hard to stop because it has a lot of inertia. Inertia can be simplified to, "objects want to keep doing what they are doing." It's when they are forced to do something different that they are doing that is why roller coaster riders experience the float or tossing around of the ride.

The current stellar "yardstick" is the ______

Answers

The light year is the unit often used to describe distance in terms of astronomy

It the 'parsec', equal to about 3.26 light years.

For an isothermal process, the work done by or on a system of ideal gas is equal to the change in what? A. The work done is equal to the change in internal energy.
B.The work done is equal to the change in heat energy.
C.The work done is equal to change in entropy.
D.The work done is equal to the change in pressure.

Answers

For an isothermal process, the work done by or on a system of ideal gas is equal to the change in heat energy. The correct option is B.

What is isothermal process?

The process in which the temperature remains constant and other physical quantities are variable, is called the isothermal process.

From the first law of thermodynamics, the work done is the difference between heat supplied and change in internal energy of the system.

W = ΔQ - ΔU

For isothermal process, change in internal energy will be zero.

So, work done is equal to the change in heat energy.

Thus, the correct option is B.

Learn more about isothermal process.

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the work done is equal to the change in heat energy

The potentially dangerous part of the electromagnetic spectrum is produced to generate power with nuclear energy A. Gamma Rays B.Radio Waves C.Microwaves D. Infrared Rays

Answers

Answer:A- Gamma rays

Explanation:

Gamma rays are most dangerous among all the given rays because it has the highest frequency i.e. high penetrating tendency. They can also pass through bones and teeth and this is the reason for their potential hazard.

They can destroy the living cell, initiate gene mutation and can cause cancer.

But they can also be used for destroying cancer cells.

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