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UkoKoshka [18]
2 years ago
14

The plane is flying with a velocity of 220m/s when it encounters a 45 m/s wind blowing same direction as the planes motion calul

ate the new velocity of the plane relative to the ground
Physics
1 answer:
Inga [223]2 years ago
5 0

Answer:

I have no idea

Explanation:

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What do objects in space that are moving at a constant velocity in a straight line do?
ss7ja [257]

Answer:

B

Explanation:

I took the test and got it wrong. but then it showed me the right answer.

4 0
3 years ago
Why do we generally hear a thunder when there is a Bolt of lightning
Svetradugi [14.3K]

Answer:

Explanation:

When a lightning bolt travels from the cloud to the ground it actually opens up a little hole in the air, called a channel. Once then light is gone the air collapses back in and creates a sound wave that we hear as thunder. The reason we see lightning before we hear thunder is because light travels faster than sound!

4 0
3 years ago
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Which of the following is not a greenhouse gas?
Harman [31]

Answer:

The answer is B

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Hope this helps:)

6 0
2 years ago
Geology belongs to which main category of science?
sergey [27]
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7 0
3 years ago
A fl oor polisher has a rotating disk that has a 15-cm radius. The disk rotates at a constant angular velocity of 1.4 rev/s and
N76 [4]

Answer:

59.4 meters

Explanation:

The correct question statement is :

A floor polisher has a rotating disk that has a 15-cm radius. The disk rotates at a constant angular velocity of 1.4 rev/s and is covered with a soft material that does the polishing. An operator holds the polisher in one place for 4.5 s, in order to buff an especially scuff ed area of the floor. How far (in meters) does a spot on the outer edge of the disk move during this time?

Solution:

We know for a circle of radius r and θ angle by an arc of length S at the center,

S=rθ

This gives

θ=S/r

also we know angular velocity

ω=θ/t    where t is time

or

θ=ωt

and we know

1 revolution =2π radians

From this we have

angular velocity ω = 1.4 revolutions per sec =  1.4×2π radians /sec = 1.4×3.14×2×= 8.8 radians / sec

Putting values of ω and time t in

θ=ωt

we have

θ= 8.8 rad / sec × 4.5 sec

θ= 396 radians

We are given radius r = 15 cm = 15 ×0.01 m=0.15 m (because 1 m= 100 cm and hence, 1 cm = 0.01 m)

put this value of θ and r  in

S=rθ

we have

S= 396 radians ×0.15 m=59.4 m

7 0
3 years ago
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