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LUCKY_DIMON [66]
3 years ago
14

A motorboat approaches you head-on and sounds two shorts blasts. you would prefer to pass the boat on your port (left) side. whi

ch sound signal should you use to indicate your disagreement?
Physics
2 answers:
SpyIntel [72]3 years ago
7 0
Sound signals are used during sailing to communication one's intention to other users. When you are not in agreement with another vessel's intent, you are required to sound the danger signal which is made up of five short and rapid blasts; the duration of each blast and the interval between the flashes should be about one second.
Volgvan3 years ago
3 0

Answer:

One Short Blast

Explanation:

If the launch approaches you and it sounds two short blasts, it means that the boom intends to allow you to pass them on the starboard side, that is, on the right side.

However, you do not want to do this, and you want to pass on the left side of the boat door. To communicate your desire to the motorboat, you have to sound one short blast. This sign allows you to say "I want to pass on your left side, next to your door and not on the starboard side".

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1. 1500j of work was done to move a box 20m. What force was applied to the box ?
Fantom [35]

Answer:

1. 75N

2. 67,983 J (=67.98 kJ)

Explanation:

1. Work = Force x Distance

we are given that Work = 1,500J and Distance = 20m

hence,

Work = Force x Distance

1,500 = Force x 20

Force = 1,500 ÷ 20 = 75N

2. Potential Energy, PE = mass x gravity x change in height

we are given that mass = 165 kg and change in height = 42m

assuming that gravity, g = 9.81 m/s²

Potential Energy, PE = mass x gravity x change in height

Potential Energy, PE = 165 x 9.81 x 42 = 67,983 J (=67.98 kJ)

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3 years ago
All of the following are involved in the geological process except (2 points) gravity temperature changes thawing and freezing e
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3 years ago
After a hold up, Robin Banks flees in his 1575 kg getaway car at 20 m/s. He crashes into a 45 kg highway barrel which is at rest
fiasKO [112]

Answer:

v = 38.9 m/s

Explanation:

7 0
3 years ago
Read 2 more answers
Joey is riding in an elevator which is accelerating upwards at 2.0 m/s2. The elevator weighs 300.0 kg, and Joey weighs 60.0 kg.
vodka [1.7K]

4200 N  is the tension in the cable that pulls the elevator upwards.

The correct option is A.

<h3>What does tension ?</h3>

Tension is the force that is sent through a rope, thread, or wire whenever two opposing forces pull on it. Along the whole length of the wire, the tensile stress pulls equally on all objects at the ends. Every physical object that comes into contact with that other one exerts force on it.

<h3>Briefing:</h3>

We employ the following formula to determine the cable's tension.

Formula:

T = mg+ma............ Equation 1

Where:

T is the cable's tension.

M = Mass of the elevator and the Joey

Accelerating with a

g = Gravitational acceleration

Considering the query,

Given:

m = (300+60) = 360 kg

a = 2 m/s²

g = 9.8 m/s²

Substitute these values into equation 2

T = (360×9.8)+(360×2)

T = 3528+720

T = 4248 N

T ≈ 4200 to the nearest hundred.

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7 0
2 years ago
an object has a momentum of 250 kg m/s what would be the momentum of an object that has half of the mass and going at the same v
Romashka-Z-Leto [24]

The momentum of the second object is 125 kg m/s

Explanation:

The momentum of an object is given by

p=mv

where

m is the mass of the object

v is its velocity

For the object in this problem,

p = 250 kg m/s

And its mass is m and its velocity is v.

The second object has a mass of m' = \frac{m}{2} and same velocity v, so its momentum is

p'=m'v = (\frac{m}{2})v=\frac{1}{2}(mv)=\frac{1}{2}p

So, the second object has a momentum that is half of the momentum of the first object, therefore it is:

p'=\frac{1}{2}(250)=125 kg m/s

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3 years ago
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