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3 years ago

URGENT! 50pts! Help with rotational speed questions please?

1 answer:

7 0

1). If you want the wheel to turn as one solid piece, then all parts of it must have the same RATE of rotation. If one part was going 2 RPM and another part was going 3 RPM, then there's no way both parts could stay hooked together. Their SPEED depends on their distance from the center, but they all have to make the same RPM. 2). The CENTRIPETAL acceleration of anything that's rotating is. m-v-squared/ R. The object's speed depends on its radius, and it's acceleration varies directly with the square of the speed. So if you move in to half the radius, the acceleration becomes 1/4 of the original value.

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A piece of metal has a weight of 6.5 N when it is in air and 3.0 N when it is submerged into water. What is the buoyant force on

Kamila [148]

Answer:

The buoyant force on the piece of iron is 3.5 newtons.

Explanation:

According to the Archimedes' Principle, the piece of metal experiments a buoyant force equal to the weight of the displaced fluid. By Newton's Laws, we have the following formula:

$F_{B} - W_{P}+W_{F} = 0$ (1)

Where:

$F_{B}$ - Buoyant force on the piece of iron, in newtons.

$W_{P}$ - Weight of the piece of metal, in newtons.

$W_{F}$ - Weight of the fluid displaced by the piece of metal, in newtons.

$F_{B} = W_{P}-W_{F}$

If we know that $W_{P} = 6.5\,N$ and $W_{F} = 3\,N$ , then the buoyant force on the piece of iron is:

$F_{B} = 6.5\,N - 3\,N$

$F_{B} = 3.5\,N$

The buoyant force on the piece of iron is 3.5 newtons.

7 0

3 years ago

If the archerfish spits its water 60 degrees from the horizontal aiming at an insect 1.4 m above

Arisa [49]

Answer:

6.1 m/s

Explanation:

Take up to be positive. Given (in the y direction):

Δy = 1.4 m

vᵧ = 0 m/s

g = -10 m/s²

Find: v₀ᵧ

vᵧ² = v₀ᵧ² + 2aΔy

(0 m/s)² = v₀ᵧ² + 2 (-10 m/s²) (1.4 m)

v₀ᵧ = 5.29 m/s

The vertical component is 5.29 m/s. So the total magnitude of the initial velocity is:

v₀ᵧ = v₀ sin θ

5.29 m/s = v₀ sin 60°

v₀ = 6.11 m/s

Rounding to two significant figures, the fish must spit the water at 6.1 m/s.

6 0

3 years ago

Describe how an adult can teach a child to become a racist or bigot using positive reinforcement and negative punishment. Make s

tatiyna

Answer:

by raising them in an environment in wich it is common and giving false information about other races to install bad stereo types and distrust in the child who will grow up to not know any better do to the dumb ignorant parent raised the same way

Explanation:

?????? thats all i got im not a politician BLM

6 0

4 years ago

The sum of all forces acting on an object is what is referred to as _________

docker41 [41]

Net force is the total of all forces acting in the object.

8 0

3 years ago

A charge travels from the positive terminal of a 6�-V battery, through a light bulb, and through the battery back to the positiv

kodGreya [7K]

Answer:

0 V

Explanation:

- The potential for the charge to flow through the circuit and back to the same terminal means that work-done per unit length i.e Potential difference is zero because the total work-done for the charge to complete the loop and back at the same point " Terminal "

Potential difference = 6 - 6 = 0 V

8 0

3 years ago