How much kinetic energy does a 0.30-kg stone have if it is thrown at 44 m/s?
O 440J
O 510 J
O 580J
0 290

Answer:

Z  = (R^2 + X^2)^1/2

At the resonant frequency, the quantity X equal zero and

w L - 1 / (w * C) equals zero where w is omega the angular frequency

Answer:

the number of turns in the winding is 387 turns.

Explanation:

Given;

radius of the solenoid, r = 0.12 m

cross sectional area of the solenoid, A = 20 x 10⁻⁴ m²

current flowing through the solenoid, I = 20 A

the energy of the flowing current, E = 0.1 J

The energy stored in solenoid is given as;

[tex]U = \frac{1}{2} LI^2\\\\L = \frac{2U}{I^2} \\\\L = \frac{2 \times 0.1}{20^2} \\\\L = 5 \times 10^{-4} \ H[/tex]

The number of turns in the winding is calculated as follows;

[tex]L = \frac{\mu_o N^2A}{2\pi r} \\\\N^2 = \frac{2\pi r L}{\mu_o A} \\\\N = \sqrt{\frac{2\pi r L}{\mu_o A}} \\\\N = \sqrt{\frac{2\pi \times 0.12 \times 5\times 10^{-4} }{4\pi \times 10^{-7} \times 20\times 10^{-4} }}\\\\N = 387 \ turns[/tex]

Therefore, the number of turns in the winding is 387 turns.

Answer:

can you explain yourself more please

Explanation:

Answer:

spectrograph

hope it is helpful to you

Answer: spectograph

Explanation:

Answer:

The total energy must be .7 J + .3 J = 1 J     for a particle at the endpoint or midpoint of motion.

Also,    omega = (k / m)^1/2

f = omega / (2 * pi)

omega^2 = 4 pi^2 * f^2 = k / m    

k = 4 * pi^2 * f^2 * m = 40.05

Max KE or PE = 1/2 k A^2

A^2 = 2 * E / k = 2 * 1 / k = .0499

A = .223 meters

Answer:

D. 10 atoms

Explanation:

Answer:

v = √{2(GmE(1/RE - 1/(RE + h)]}

Explanation:

From the law of conservation of energy, the total kinetic + potential energy at h = total kinetic  + potential energy at the surface of the earth(h = 0)

So, K + U = K' + U'

where K = kinetic energy of hammer at h = 0

U = gravitational potential energy of hammer at h = -GmEm/(RE + h)

K' = kinetic energy of hammer at the earth's surface (h = 0) = 1/2mv²

U = gravitational potential energy of hammer at earth's surface (h = 0) = -GmEm/RE

So, K + U = K' + U'

0 + [-GmEm/(RE + h)] = 1/2mv² +  [-GmEm/RE]

0 - GmEm/(RE + h) = 1/2mv² - GmEm/RE

collecting like terms,we have

1/2mv² = GmEm/RE - GmEm/(RE + h)

Factorizing GmE and multiplying both sides by 2, we have

v² = 2(GmE(1/RE - 1/(RE + h)]

taking square-root of both sides, we have

v = √{2(GmE(1/RE - 1/(RE + h)]}

The expression for the speed of the hammer will be:

[tex]V=\sqrt{2(Gm_e(\dfrac{1}{R_e}-\dfrac{1}{R_e+h}) }[/tex]

The law of conservation says that the total energy at the height h and the total energy at the surface of the earth will remain constant.

From the law of conservation of energy

[tex]KE+PE=KE'+PE'[/tex]

where

KE = kinetic energy of hammer at h = 0

PE = gravitational potential energy of hammer at h height

[tex]PE=\dfrac{-Gm_em}{R_e+h}[/tex]

KE' = kinetic energy of hammer at the earth's surface (h = 0)

[tex]KE'=\dfrac{1}{2} mv^2[/tex]  

PE' = gravitational potential energy of hammer at earth's surface (h = 0)

[tex]PE'=\dfrac{Gm_em}{R_e}[/tex]

Now by putting the values

[tex]KE+PE=KE'+PE'[/tex]

[tex]0+ \dfrac{-Gm_em}{R_e+h}[/tex]   [tex]=\dfrac{1}{2} mv^2[/tex] [tex]-\dfrac{Gm_em}{R_e}[/tex]

[tex]\dfrac{1}{2} mv^2=\dfrac{Gm_em}{R_e} -\dfrac{Gm_em}{R_e+h}[/tex]

[tex]v^2=2Gm_e(\dfrac{1}{R_e} -\dfrac{1}{R_e+h} )[/tex]

[tex]v=\sqrt{2Gm_e(\dfrac{1}{R_e} -\dfrac{1}{R_e+h} )}[/tex]

Thus the expression for the speed of the hammer will be:

[tex]V=\sqrt{2(Gm_e(\dfrac{1}{R_e}-\dfrac{1}{R_e+h}) }[/tex]

To know more about the speed follow

https://brainly.com/question/6504879

Answer:

The correct answer is - fight or flight response or reaction.

Explanation:

According to Cannon, the fight or flight reaction is a strong emotion experienced by a person especially people experiences associated with a perceived threat.

This reaction takes place in form of arousal in a perceived threat or stress conditions. It helps in maintaining the body environment in panic or stressed conditions.

Answer:

If it moves at the same speed but has twice as much mass, its momentum is ... there is no air in space; there is no friction in space; there is no gravity in outer space ... One cart rolls rightward at 2 m/s and the other cart rolls leftward at 1 m/s. ... A 5-N force is applied to a 3-kg ball to change its velocity from +9 m/s to +3 m/s.

Explanation:

Answer:

No temperature change occurs from heat transfer if ice melts and becomes liquid water (i.e., during a ... to change 1 kg of liquid water at the normal boiling point (100ºC at atmospheric pressure) to steam (water vapor).

The melting point of lead is 327.3o C. Assume the final temperature of the system is T. Then the amount of energy released by the lead as it solidifies is. ΔQ = mleadLlead = 0.09 kg*(2.45*104 J/kg) = 2205 J

Answer:

its b 100 kg

they told m¹ and m²

160‐60

Answer:

c

Explanation:

Answer:

[tex]2Al + N_{2} ==> 2AlN[/tex]

Explanation:

Answer:

4 photovoltaic cells are required to meet monthly energy consumption of the cabin.

Explanation:

Let suppose that PV generation system produces energy at constant energy, the number of photovoltaic system to meet energy consumption of the cabin is:

[tex]n = \frac{E}{\dot E \cdot t}[/tex] (1)

Where:

[tex]E[/tex] - Energy consumption of the PV system, in kilowatt-hours.

[tex]\dot E[/tex] - Power generation of the PV cell, in kilowatts.

[tex]t[/tex] - Working times, in hours.

If we know that [tex]E = 720\,kWh[/tex], [tex]\dot E = 0.25\,kW[/tex] and [tex]t = 720\,h[/tex], then the number of photovoltai cells is:

[tex]n = \frac{E}{\dot E \cdot t}[/tex]

[tex]n = 4[/tex]

4 photovoltaic cells are required to meet monthly energy consumption of the cabin.

Answer:

1) Van der rcf generator

2) the charge is distributed among all the hairs, as they all have the same potential,

the charges are of the same sign repel each other

Explanation:

1.) The object is a Van der rcf generator, which is loaded by friction,

The girl has no load

2) when the girl touches the sphere of the generator part of the electrons of this is transferred to the girl, when this charge reaches the hair, the charge is distributed among all the hairs, as they all have the same potential,

the charges are of the same sign repel each other

Answer:

acceleration = - 9.8 m/s²

Explanation:

From the question, we can deduce that the only force that will be acting on the car is gravity and as such the acceleration during free fall will be equal to the acceleration due to gravity but will be negative since it is towards the ground.

Thus, acceleration = - 9.8 m/s²

Answer:

the correct answer is A

Explanation:

This is a doppler effect exercise which is the change in frequency due to the relative movement of the sound source and the observer.

          [tex]f' = f_o \ \frac{v+v_o}{v-v_s}[/tex]

where v₀ is the speed of the observer and v_s the speed of the source, the signs correspond when the two are closing in

with this expression let's analyze the different answers

A) True. The observed change is in the frequency, in this case the two are moving away, so the expression that describes the phenomenon is

        [tex]f'= f_o \ \frac {v-v_o}{ v+v_s}[/tex]

In this case, the speed of the source is greater than the speed of the observer, so when the denominator increases faster than the numerator, consequently the frequency must decrease

B) False. The amplitude does not depend on the relative velocity

C) False. The intensity depends on the distance, by or which when increasing the distance the intensity should decrease

D) False. The speed of sound is a constant, if the frequency decreases the wavelength must increase to maintain equality

E) False. The speed of sound depends on the properties of the propagating medium, not on the relative speed of the source and the observer.

Consequently the correct answer is A

Answer:

the Gravitational potential energy is 13.23 J

Explanation:

The computation of the GPE is shown below:

GPE stands for Gravitational potential energy

The following formula should be used for the same

= mass × gravity × height

= 3000 g × 9.8m/sec^2 × 0.45 m

= 13.23 J

Hence, the Gravitational potential energy is 13.23 J

We simply applied the above formula so that we can easily determine the GPE

Answer:

solidification

Explanation:

a liquid becoming a solid, is called solidification. For any pure substance, the temperature at which melting occurs—known as the melting point—is a characteristic of that substance.

Answer:

b

Explanation:

For given diverging lens(Concave) ; a) The distance of the image is -6 Cm, b) The image is virtual.

The lens that diverge incident parallel beam of light after refraction from the lens, is called diverging or concave lens.

Given data:

a)

        [tex]\frac{1}{f} = \frac{1}{v} - \frac{1}{u} \\[/tex]

        [tex]\frac{1}{-10} = \frac{1}{v} - \frac{1}{-15}\\\frac{1}{-10} = \frac{1}{v} + \frac{1}{15}[/tex]

        [tex]\frac{1}{v} = \frac{1}{-10} -\frac{1}{15} \\\frac{1}{v} = \frac{-3-2}{30} \\[/tex]

         [tex]v = -6 Cm[/tex]

b) Magnification ,

m= ([tex]\frac{v}{u}[/tex])

on putting values,

[tex]m =(\frac{-6}{-15} )=\frac{2}{5} =0.4[/tex]

since m is positive it means the image is virtual

Hence a) distance of image is -6 Cm and b) the image is virtual.

Find out more information about the concave lens here:

https://brainly.com/question/2919483

#SPJ2        

Answer:

option c is the correct one

Answer:

10kg

Explanation:

Weight is "how much does gravity drag this down".

Mass is "how much matter is there here".

The relation is:

[tex]F_g = mg[/tex]

where [tex]F_g[/tex] is the weight, [tex]m[/tex] is the mass and [tex]g[/tex] is the gravitational acceleration (roughly equal to 10N/kg on Earth).

From the task we know that:

[tex]F_g = 100N\\g = 10\frac{N}{kg}[/tex]

So let's input it into the relation:

[tex]100N = m\cdot 10\frac{N}{kg}\\10N = m \cdot 1\frac{N}{kg}\\10N \cdot \frac{kg}{N} = m\\~\\m = 10kg[/tex]

Answer:

lungs

Explanation:

lungs bring oxygen

Answer:

lungs

Explanation:

i took the quiz

Answer:

they gather information from reflected and absorbed waves.

Explanation:

Answer:

D

Explanation:

It’s D