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Arte-miy333 [17]
3 years ago
14

How many forces are acting on a stationary raft floating in a swimming pool A1 B2 or C3

Physics
1 answer:
Hitman42 [59]3 years ago
3 0
There are at least two forces on it, and there could be more.

Vertical forces:
-- gravity, directed downward
-- buoyant force, directed upward
These two forces must be exactly equal, so that the net
vertical force on the raft is zero.  Otherwise, it would be
accelerating either up or down.

Horizontal forces:
We know that the net horizontal force on the raft is zero. 
Otherwise, it would be accelerating horizontally.

But we don't know if there are actually no horizontal forces
at all, or a balanced group of horizontal forces, that add up
to a net force of zero.
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The tools to distinguish the thickness of two objects of thickness of 1.92mm and the other with thickness of 1.93mm is ?
melomori [17]

Answer:

the instrument that gives this precision is the micrometer screw

Explanation:

The high precision measurements of small parts are the general vernier and the micrometer screw.

In these two instruments the same principle is used: there is a fixed rule and a mobile one that increases precision.

Let's analyze the absolute error or precision of each instrument

* For the vernier, the precision of the fixed rule is 1 mm and there are 20 divisions (the most common); therefore the precision of the instrument is

            Δx = 1 mm / 20

            Δx = 0.05 mm

* For the micrometer screw, the precision of the fida rule is 0.5 mm and the number of divisions is 50, therefore the precision of the screw is

            Δx = 0.5mm / 50

            Δx = 0.01 mm

consequently the instrument that gives this precision is the micrometer screw

8 0
3 years ago
What is the mass of a 4900 n bobsled?
hammer [34]
The mass of a 4,900 newtons bobsled is 500 kilograms.
8 0
3 years ago
Draw a diagram showing 2 forces acting on an object in opposite directions with a total net force of 3N to the left.
andriy [413]

Answer:

hope it helps u ........

6 0
2 years ago
Read 2 more answers
The main difference between speed and velocity involves
grigory [225]
The main difference is direction.  C.

Speed is a scalar quantity, while Velocity is a vector quantity.
Speed is measured without taking into fact direction, but Velocity takes into fact the direction.
3 0
3 years ago
The fine horizontal scratches etched onto a bullet after it has been fired are called?
GalinKa [24]

The fine horizontal scratches etched onto a bullet after it has been fired are called Striations.

<h3>What is Striations?</h3>
  • Striations are the minute differences in the curve of the bullet's surface. The bullet and the gun barrel are the harder and softer materials, respectively, in firearms evidence.
  • The striations left on the fired bullet are used as a comparison by firearm examiners.
  • When a gun is discharged, the bullet blasts down the barrel where it strikes ridges and grooves, spinning and improving shot accuracy.
  • These ridges cause striations in the bullet's soft metal by digging into it.
  • An examiner analyses these distinctive markings to verify whether a given bullet was shot from a specific firearm.
  • A barrel will produce individual markings in addition to a bullet's land and groove impressions as the projectile passes through.

Learn more about Bullet here:

brainly.com/question/6669700

#SPJ4

4 0
2 years ago
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