someone help me answer this.

Bug Walking on Pivoted Ring A ring of radius R and mass my lies on its side on a frictionless table. It is pivoted to the table at its rim. A bug of mass my walks on the ring with constant speed v relative to the ring, starting at the pivot, when the ring is initially at rest. Take k to point out of the page. top view frictionless table ring bug Pluot Point (a) What is the angular velocity of the ring when the bug is halfway around? Express you answer in terms of some or all of the following: mi, m2, u, R and k. (b) What is the angular velocity of the ring when the bug is back at the pivot? Express you answer in terms of some or all of the following: mı, m2, v, R and k.​

Answer:

As a result, light travels fastest in empty space, and travels slowest in solids. In glass, for example, light travels about 197,000 km/s.

Explanation:

Answer:

The Vibrating parts of a Guitar is it's Strings

Explanation:

Guitars are classified in 2 sections: the neck and the body. Strings run through the neck and body of the guitar. When a string is played its vibration is transmitted from the bridge, resonating throughout the top of the guitar.

Answer:

the strings are the part that vibrates

Explanation:

In the trachea's inner layer, you have small, hair-like structures called cilia. Cilia move in rhythm to push mucus out of your trachea so that you either expel or swallow it

Explanation:

The substance with less quantity of matter has less mass and that with more quantity has more mass..

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The final velocity of m₁=2kg with its velocity at 5m/s will be 4 m/s.

According to the law of conservation of momentum, the momentum of the body before the collision is always equal to the momentum of the body after the collision.

The given data in the problem is;

(m₁) is the mass = 2 kg

initial velocity (u₁) =5m/s

(m₂) is the mass  = 0.5

(u₂) initial velocity = 0 m/s

(v) is the velocity  =.?

According to the law of conservation of momentum;

Momentum before collision =Momentum after collision

[tex]\rm m_1u_1 + m_2u_2 = v(m_1 + m_2) \\\\ 2(5) + 0.5(0) = v(2 + 0.5)\\\\10 = 2.5v\\\\ v = \frac{10}{2.5} \\\\ v = 4 \ m/s[/tex]

Hence,The final velocity of m₁=2kg with its velocity at 5m/s will be 4 m/s.

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Hello!

A)
We can solve for the reactances of each element using the following equations.

Capacitive reactance:
[tex]X_C = \frac{1}{\omega C}[/tex]

[tex]X_C[/tex] = Capacitive reactance (Ω)
ω = Angular frequency (2000 rad/sec)

C = Capacitance (2 μF)

Plug in the given values and solve.

[tex]X_C = \frac{1}{(2000)(0.000002)} = \boxed{250 \Omega}[/tex]

Inductive reactance:
[tex]X_L = \omega L[/tex]

[tex]X_L[/tex] = Inductive reactance (Ω)
L = Inductance (70 mH)

Solve:
[tex]X_L = 2000 * 0.07 = \boxed{140 \Omega}[/tex]

We can solve for impedance using the following equation:
[tex]Z = \sqrt{R^2 + (X_L - X_C)^2}[/tex]

Z = Impedance (Ω)

R = Resistance (200Ω)

Find the impedance using the values above and the given resistance:
[tex]Z = \sqrt{200^2 + (140 - 250)^2} = \boxed{228.254 \Omega}[/tex]

B)
The maximum current amplitude is found using Ohm's law:

[tex]I_{Max} = \frac{V_{Max}}{Z}[/tex]

[tex]V_{Max}[/tex] = 80V

Z = 228.254 Ω

Solve.

[tex]I_{Max} = \frac{80}{228.254} = \boxed{0.3505 A}[/tex]

To find the max voltages across each element, we can also use Ohm's Law.

For the resistor:
[tex]V_{R, max} = i_{Max} R\\\\V_{R, max} = (0.3505)(200) = \boxed{70.097 V}[/tex]

For the capacitor:

[tex]V_{C, max} = i_{Max}X_C\\\\V_{C, max} = (0.3505)(250) = \boxed{87.622 V}[/tex]

For the inductor:
[tex]V_{L, max} = i_{Max}X_L\\\\V_{L, max} = (0.3505)(140) = \boxed{49.068 V}[/tex]

C)
The maximum voltage across each element is greater than 80 V because of the transfer of energy between the capacitor and inductor that occur at different times (energy is stored and released) and being in addition to the voltage of the power source.

Answer:

Total resistance in parallel is Rp

So (1/Rp) = (1/12)+(1/16)+(1/20)

Rp = ?

impedance is 25

25 = Rp + Rs

put the value of Rp you'll get the answer.

Answer:

The magnetic separation

Explanation:

It is a process in which magnetically susceptible material is extracted from a mixture using magnetic force. This is best way to separate the mixture of sand and iron fillings as iron is attracted by magnet.

Answer:

the data change decreased and then increased. this went on repeatly but the decrease became less as the increase became more.

Answer:

From largest to smallest they are: Universe, galaxy, solar system, star, planet, moon and asteroid.

Explanation:

The height of the mansion that the assassin shot the target from is determined as 1,164.9 ft.

The time of motion of the bullet is calculated as follows;

-h = vsinθ(t)  - ¹/₂gt²

-6.1 = (vt) sin63  - ¹/₂(32)t²

-6.1 = 0.89vt - 16t² ---(1)

X = vcosθ t

294 = (vt)cos63

294 = 0.454vt

vt = 294/0.454

vt = 647.577 ---(2)

solve (1) and (2) together;

-6.1 = 0.89(647.577) - 16t²

16t² = 576.344 + 6.1

16t² =  582.44

t² = 582.44/16

t² = 36.4

t = √36.4

t = 6.03 s

v = 647.577/t

v = 647.577/6.03

v = 107.4 ft/s

h = vt + ¹/₂gt²

h = (107.4 x sin63 x 6.03) + ¹/₂(32)(6.03)²

h = 1,158.8 ft

H = 1,158.8 ft + 6.1 ft = 1,164.9 ft

Thus, the height of the mansion that the assassin shot the target from is determined as 1,164.9 ft.

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Answer:

I think it depends on the purpose of using Gamma rays. It can be both good and bad

Answer:

"light year" - about 6 million million miles

The nearest star is alpha Centauri - about 24 million million miles away

Jenny and Tina play jumping rope,Ben and Ted plays soccer and football and Bovet and Cris perform aerobic exercises​ are the following situations is reaction time exhibited. Option A,B and D are correct.

The reaction time of an organism is a measurement of how quickly it responds to a stimulus.

The time interval between the presentation of the stimulus and the manifestation of a suitable voluntary response in the subject is defined as RT.

In the following situations is reaction time exhibited is;

A. Jenny and Tina play jumping rope.

B. Ben and Ted play soccer and football .

D. Bovet and Cris perform aerobic exercises​.

Hence,option A,B and D are correct.

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Answer: 7.364 x 10^-4 N

Explanation:

[tex]$$Given:$$\begin{aligned}m_{1} &=7.5 \times 10^{5} \mathrm{~kg} \\m_{2} &=9.2 \times 10^{7} \mathrm{~kg} \\r &=2.5 \times 10^{3} \mathrm{~m}\end{aligned}$$Here, $m_{1}, m_{2}$, and $r$ are the first mass, the second mass, and the distance[/tex]

[tex]$$The gravitational force exerted between the masses is determined as follows.$$F=G \frac{m_{1} m_{2}}{r^{2}}$$Here, $G$ is the gravitational constant.Substitute the known values.$$\begin{aligned}F &=\left(6.67 \times 0^{-11} \mathrm{~N} \mathrm{~m}^{2} / \mathrm{kg}^{2}\right) \frac{\left(7.5 \times 10^{5} \mathrm{~kg}\right)\left(2.5 \times 10^{7} \mathrm{~kg}\right)}{\left(2.5 \times 10^{3} \mathrm{~m}\right)^{2}} \\&\bold{=7.364 \times 10^{-4} \bold{\mathrm{~N}}}\end{aligned}$$[/tex]

(a) The speed  of puck A before the collision is determined as 0.847 m/s.

(b) The change in the total kinetic energy of the system that occurs during the collision is 0.009 J.

The speed of puck A before the collision is calculated from the principle of conservation of linear momentum as follows;

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

0.251u₁ + 0.371(0) = 0.251( -0.12) + 0.371(0.654)

0.251u₁ = 0.2125

u₁ = 0.2125/0.251

u₁ = 0.847 m/s to the right

Initial kinetic energy = ¹/₂ x 0.251 x (0.847)² + ¹/₂ x 0.371 x (0) = 0.09 J

Final kinetic energy = ¹/₂ x 0.251 x (-0.12)² + ¹/₂ x 0.371 x (0.654)² = 0.081 J

ΔK.E = 0.081 - 0.09 = 0.009 J ≈ 0 J

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Answer:

Thus, the change in the weight of the person is 1.6N , option c is correct.

Explanation:

The phenomenon known as the Emission Spectra.

Emission spectrum is the phenomenon provides evidence that the hydrogen atom has discrete energy levels.

Emission spectrum is the spectrum of the different energy levels. The occurrence of emission spectrum gives proof that the hydrogen atom has distinct energy levels.

Emission spectrum is the phenomenon provides evidence that the hydrogen atom has discrete energy levels

Hence, the phenomenon is known as emission spectrum.

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a)The speed of the ball at the time of impact will be 8.1 m/sec.

b)The time taken by the ball impacts the surface of trampoline will be 1.1 second.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. Its SI unit is m/sec.

Given data;

g( gravitational acceleration) = 9.81 m/s2

u (initial velocity of ball) = 2.5 m/s

h₁(initial height of the ball) = 3.0 m

v (speed of the ball at the time of impact ) ?

The time taken by ball for upward journey = u / g

t₁ = u / g

t₁  = (2.5 m/s) / (9.81 m/s2) =

t₁  =0.2548 s

From second equation of motion,upward vertical distance covered by ball is;

[tex]\rm h_2= \frac{1}{2} gt^2\\\\ h_2=\frac{1}{2} \times 9.81 \times (0.2548)^2\\\\ h_2=0.3184[/tex]

The total distance in the downward direction travelled;

[tex]\rm h_3=h_1+h_2 \\\\ h_3=3.0+0.3184 \\\\ h_3=3.3184 \ m[/tex]

The time taken for the downward motion is;

[tex]\rm t_2 = (\frac{2 \times h_3 }{g} )^\frac{1}{2}\\\\ t_2 = 0.825 \ m/sec[/tex]

The speed of the ball at the time of impact is found as;

[tex]\rm V=gt_2 \\\\ V= 9.81 \times 0.8225 \\\\ V= 8.07 \ m/sec[/tex]

The total time of the flight of ball is;

[tex]\rm t_3 = t_1+t_2 \\\\ t_3=0.2548+0.8225 \\\\ t_3=1.0774 \ sec[/tex]

Hence,the speed of the ball at the time of impact will be 8.1 m/sec and time taken by the ball impacts the surface of trampoline will be 1.1 second.

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Answer:

Hence, electric field intensity at equatorial point is given by, $\therefore {E_p} = - \dfrac{1}{{4\pi {\varepsilon _0}}}\dfrac{{\vec P}}{{{d^3}}}$. And the direction of the electric field is always opposite to that of the electric dipole.

Answer:

Different colour lights (RBG) uses additive properties to bring light of a certain color to our eyes.

Explanation:

:))

Answer:

Iron meteorites

Explanation:

Answer:

iron, nickel, iridium, palladium, platinum, gold, and magnesium

You can choose any one which you like.

Explanation:

All minerals that we humans found are found in space.

And minerals unknown are also found.

Answer:

okay

Explanation:

power is rate of doing work

power is workdone over time taken

but you don't have information concerning the force

Power = work/time

Work = force x distance

Force = mass x acceleration

So Power = (mass x acceleration x distance) / (time)

acceleration = 8m/s / 2sec  =  4 m/s²

distance = (avg speed) x (time) = 8 m

time = 2 sec

we don't know the runner's mass

Power = (mass) x (4 m/s²) x (8 m) / (2 sec)

Power = (16 x mass in kg) watts

=============================================

Slightly easier way to do it:

Power = (runner's kinetic energy at the end) / (time)

Power = (1/2 m v²) / (time)

Power = (1/2 mass) (64 m²/s²) / (2 sec)

Power = (16 x runner's mass in kg) watts

We can confirm that a contact force would be one in which physical contact is needed, while a no contact force does not require contact.

There are many everyday examples to be used to describe each of these forces. A very common no contact force is gravity. The Earth's gravity exerts a force on all things near the planet, but it does not need to be in physical contact to exert this force, thus making gravity a no contact force. An example of a contact force would be if you were to push another person. You are exerting a force that requires physical contact.

Therefore, we can confirm that a contact force would be one in which physical contact is needed, while a no contact force does not require contact.

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Answer:

110.4 v

Explanation:

Find the equivalent resistance of the two parallel circuits

R1 and R2 in parallel   =   R1 * R2 / (R1+ R2) =   1 ohm

 similarly R4 and R5 =  4.77 ohms

Now you can add the three resistances into one  (R3=10)

    1 ohm + 10 ohm + 4.77 ohm = 15.77 ohms

Now

V = IR

V =  7 amps  * 15.77 ohm = 110.4 v

Answer:

120 v

Explanation:

The two resistors have an equivalent of    20 * 30 /(20+30) = 12 ohms

  10 amps of current in the circuit

v = ir

  = 10 * 12 = 120 volts

Here is another way:

The two resistors are in prallel so the voltae across both is the same

  use the one on the right      v = ir     =   4 x 30 = 120 v

Answer:

5 m/s

Explanation:

Rate of movement is   distance / time

6 m / 1.2 s = 5 m/s