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Mariana [72]
2 years ago
8

Let me know if you need help figuring out how to make something in little alchemy 2.

Physics
2 answers:
Y_Kistochka [10]2 years ago
7 0

Answer:

ok

Explanation:

Kaylis [27]2 years ago
3 0

Answer:ok

Explanation:

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A uniform rod rotates in a horizontal plane about a vertical axis through one end. The rod is 3.46 m long, weighs 12.8 N, and ro
Mkey [24]

Answer:

a. Rotational inertia: 5.21kgm²

b. Magnitude of it's angular momentum: 123.32kgm²/s

Explanation:

Length of the rod = 3.46m

Weight of the rod = 12.8 N

Angular velocity of the rod= 226 rev/min

a. Rotational Inertia (I) about its axis

The formula for rotational inertia =

I = (1/12×m×L²) + m × ( L ÷ 2)²

Where L = length of the rod

m = mass of the rod

Mass of the rod is calculated by dividing the weight of the rod with the acceleration due to gravity.

Acceleration due to gravity = 9.81m/s²

Mass of the rod = 12.8N/ 9.81m/s²

Mass of the rod = 1.305kg

Rotational Inertia =

(1/12× 1.305 × 3.46²)+ 1.305 ( 3.46÷2)²

Rotational Inertia =  1.3019115 + 3.9057345

Rotational Inertia = 5.207646kgm²

Approximately = 5.21kgm²

b. The magnitude of the rod's angular momentum about the rotational axis is calculated as

Rotational Inertia about its axis × angular speed of the rod.

Angular speed of the rod is calculated as= (Angular velocity of the rod × 2π)/60

= (226×2π) /60

= 23.67 rad/s

Rotational Inertia = 5.21kgm²

The magnitude of the rod's angular momentum about the rotational axis

= 5.21kgm²× 23.67 rad/s

= 123.3207kgm²/s

Approximately = 123.32kgm²/s

7 0
3 years ago
What is one property of a suspension that is different from that of a solution or a colloid?
Step2247 [10]

Answer:

A

Explanation:

If left to rest it will separate.  

3 0
2 years ago
In order to determine an object's speed on speed vs. time graph , the axes MUST be labeled with__
Mazyrski [523]
<span>b) units and numbers</span>
6 0
3 years ago
A pitcher claims he can throw a 0.148-kg baseball with as much momentum as a 2.00-g bullet moving with a speed of 1.50 ✕ 103 m/s
Svetlanka [38]
(a) The mass of the bullet is m_b = 2.00g=0.002 kg and its speed is v_b = 1.5 \cdot 10^3 m/s, so its momentum is
p=m_b v_b = (0.002 kg)(1.5 \cdot 10^3 m/s)=3 kg m/s

The pitcher claims that he can throw the ball with the same momentum p of the ball. Since the mass of the ball is m=0.148 kg, this means that the velocity of the ball must be:
v= \frac{p}{m}= \frac{3 kg m/s}{0.148 kg}=20.3 m/s

(b) The kinetic energy of the bullet is:
K_b =  \frac{1}{2} m_b v_b^2= \frac{1}{2}(0.002 kg)(1.5 \cdot 10^3 m/s)^2=2250 J

while the kinetic energy of the ball is:
K= \frac{1}{2}mv^2= \frac{1}{2}(0.148 kg)(20.3 m/s)^2=30.5 J

So, the bullet has greater kinetic energy than the ball.
4 0
3 years ago
A conductor is placed in an external electrostatic field. Theexternal field is uniform before the conductor is placed within it.
avanturin [10]

Answer:

A) d.  B) a.  C)  E*ε₀

Explanation:

A) In electrostatic conditions, no electric field can exist within a conductor, as any existing field should produce an instantaneous charge redistribution (as charges can move freely inside a conductor) in such a way to make it 0.

B) In electrostatic conditions, as charge can move freely in a conductor, in order to remove any field inside the conductor, any excess charge must build on the surface on the conductor, so the charge density inside the conductor is 0.

C) If there is an electric field with a magnitude E, and directed towards the surface of the conductor (which means that there exists a net negative charge on the surface), we can apply Gauss´s Law to a rectangular surface (like a pill box), parallel to the surface, half inside the conductor, and half outside it.

We know that the total flux of the electric field through this surface (which it has four sides), must be equal to the enclosed charge, divided by ε₀.

As no electric field can exist inside the conductor, the flux through the bottom side is 0.

For the sides perpendicular to the surface, the flux should be produced by any tangential electric field.

In electrostatic conditions, should any tangential field existed, this would produce a charge movement in order to make it 0, so the flux through the sides is 0 also.

We have only one face with a non-zero flux, which can be calculated as follows (assuming E constant along the surface):

E*A = Q/ε₀ (1)

If the net charge is evenly distributed along the surface, we can define a surface charge density, σ, as follows:

σ = \frac{Q}{A}

Replacing this value in (1):

E = σ / ε₀

⇒ σ = E*ε₀

5 0
3 years ago
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