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3 years ago

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* WILL GIVE BRAINLIEST TO CORRECT ANSWER *

1 answer:

stepan [7]3 years ago

3 0

I would say food but like they take weight too

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A 91.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.73 r

KIM [24]

Answer:

$\omega_f = 1.08 rad/s$

Explanation:

As we know that there is no external torque on the system of platform, banana and the monkey

so the angular momentum of the system will remains conserved

so here we can say

$L_i = L_f$

$I_o\omega = (I_o + m_1r_1^2 + m_2r_2^2)\omega_f$

here we know that

$I_o = \frac{1}{2}mR^2$

$I_o = \frac{1}{2}(91.1)(1.61)^2 = 118.1 kg m^2$

$m_1 = 9.41 kg$

$r_1 = \frac{4}{5}(1.61) = 1.29 m$

$m_2 = 21.1 kg$

Now from above equation

$118.1(1.73) = (118.1 + 9.41(1.29^2) + 21.1(1.61^2))\omega_f$

$118.1(1.73) = 188.45\omega_f$

$\omega_f = 1.08 rad/s$

8 0

3 years ago

Do magnets have to touch each other in order to experience a magnetic<br> force? Explain

tiny-mole [99]

Magnets don’t need to touch each other in order to be magnetic because all objects have an attraction however, the closer the magnets get, the more magnetic it is.

4 0

3 years ago

A parallel-plate capacitor with circular plates of radius R is being discharged. The displacement current through a central circ

Dvinal [7]

Answer:

The discharging current is $I_d = 36.8 \ A$

Explanation:

From the question we are told that

The radius of each circular plates is R

The displacement current is $I = 9.2 \ A$

The radius of the central circular area is $\frac{R}{2}$

The discharging current is mathematically represented as

$I_d = \frac{A}{k} * I$

where A is the area of each plate which is mathematically represented as

$A = \pi R ^2$

and k is central circular area which is mathematically represented as

$k = \pi [\frac{R}{2} ]^2$

So

$I_d = \frac{\pi R^2 }{\pi * [ \frac{R}{2}]^2 } * I$

$I_d = \frac{\pi R^2 }{\pi * \frac{R^2}{4} } * I$

$I_d = 4 * I$

substituting values

$I_d = 4 * 9.2$

$I_d = 36.8 \ A$

7 0

3 years ago

Which statements describe vectors?

laila [671]

Answer:

Vectors have a size and direction. Each of the existing vector quantity has a magnitude and a direction. Having direction along with the magnitude is the difference of a vector quantity from a scalar quantity. Vectors are indicates with arrows.

4 0

2 years ago

Read 2 more answers

Francesca, who likes physics experiments, dangles her watch from a thin piece of string while the jetliner she is in takes off f

Tom [10]

Answer:

$v_f = 82.3 m/s$

Explanation:

When a suspended string makes and angle of 25 degree while aircraft is accelerating on runway then we can use force equations to find the acceleration of the aircraft

So we will have

$T sin\theta = ma$

$T cos\theta = mg$

now from above two equations we have

$a = g tan\theta$

$a = (9.81) tan25$

$a = 4.57 m/s^2$

now if it took 18 s to take off we can have final speed of the aircraft given by

$v_f - v_i = at$

$v_f - 0 = (4.57)(18)$

$v_f = 82.3 m/s$

6 0

3 years ago