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mixas84 [53]
3 years ago
6

Select all the correct answers.

Physics
1 answer:
myrzilka [38]3 years ago
3 0

<em>Anything</em> that's dropped through air is somewhat affected by air resistance.  But, out of that list, the leaf and the balloon are the items that will be affected by air resistance enough so that you can plainly see it.

If you spend some time thinking about it, you can kind of understand why airplane wings and boat propellers are shaped more like leafs and balloons than like bricks and rocks.

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3
Assoli18 [71]
Answer: 40.4M/s

Solution: 46.6/1.15 = 40.4347826 then round it to a single decimal point, since 3 is lower than 5 it will be rounded to 40.4
8 0
2 years ago
Helicopter blades withstand tremendous stresses. In addition to supporting the weight of a helicopter, they are spun at rapid ra
BabaBlast [244]

Explanation:

It is given that,

Length of the helicopter, l = 3.1 m

The helicopter rotates, the length of helicopter will become the radius of circular path, r = 3.1 m

Angular speed of the helicopter, \omega=280\ rev/min=29.32\ rad/s

(a) The centripetal acceleration in terms of angular velocity is given by :

a_c=r\times \omega^2

a_c=3.1\times (29.32)^2

a_c=2664.95\ m/s^2

(b) Let v is the linear speed of the tip. The relation between the linear and angular speed is given by :

v=r\times \omega

v=3.1\times 29.32

v = 90.89 m/s

\dfrac{v_{tip}}{v_{sound}}=\dfrac{90.89}{340}=0.267

Hence, this is the required solution.

4 0
3 years ago
How do you label <br> Time= energy • power
Lana71 [14]

First of all, that equation is not correct, which may be the reason
that you're having trouble assigning units to the quantities.

Power is defined as [energy / time],  so  [Energy] = [ power x time ],
and
         [Time] = [ energy / power ].

Unit-wise, these equations are correct just as they appear here,
with no proportionality constants or conversion factors, when ...

[ Power ] = watts
[ Energy ] = joules
[ Time ] = seconds .
 

5 0
2 years ago
Two sets of solid double yellow lines spaced two or more feet apart indicate:.
vodomira [7]

Two Sets of solid double yellow lines with spaced two or more feet apart indicates that Do not drive on or over the barrier.

<h3>What are the line colors in lane control?</h3>

Solid yellow lines - it is marked at the center of a road and used for two-way traffic.

Broken yellow lines - It indicate that you may pass if the broken line is next to your driving lane.

Two solid yellow lines - It indicates no passing or Do not drive on or over the barrier.

Two sets of solid double yellow lines are considered a barrier , make a left turn, or a U-turn to cross it.

For more lane control content visit

brainly.com/question/1258438

#SPJ1

6 0
2 years ago
If the force acting on an object is multiplied by _____, the product is called work
Aneli [31]
The distance the object travels
5 0
3 years ago
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