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Answer:the wave model

Explanation:

Answer:

the angular speed in rad/s is 3.45

Explanation:

The computation of the angular speed in rad/s is as follows:

As we know that

1 rpm means 1 revolution per minute

Also 1 minute = 60 seconds

SO, for 33 rpm, the angular speed is

= 33 ÷ 60 × 2π

= 3.45  rad/s

As the revolution is of 360 degrees i.e. equivalent to 2π

Hence, the angular speed in rad/s is 3.45

Answer:

PE = MGH.  1375 x 9.8 x 2. = 26950 joules

Explanation:

First do 1375 x 9.8 which is MG then times it by 2 which is H

Mass x Gravity x Height

the gravity will always be 9.8

I would love a brainliest

The the potential energy of the weights lifted 2 meters above the surface is E[P] = 26950 joules.

The energy of a body by virtue of its position is called potential energy. Mathematically -

E[P] = mgh

Given is an Olympian who lifted a 1,375-kilogram set of weights a vertical distance of 2 meters in the weightlifting event.

We can write the given data as follows -

Mass of weights = [M] = 1375 Kg

Displacement = [h] = 2 meters

Therefore, using the formula for potential energy, we can write -

E[P] = mgh

E[P] = 1375 x 9.8 x 2

E[P] = 26950 joules

Therefore, the the potential energy of the weights lifted 2 meters above the surface is E[P] = 26950 joules.

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Answer:

[tex]F_f=840N[/tex]

Explanation:

From the question we are told that

Weight of fireman [tex]W_f= 87.5kg[/tex]

Pole distance [tex]D=4.10m[/tex]

Final speed is [tex]V_f 1.75m/s[/tex]

Generally the equation for velocity is mathematically represented as

[tex]v^2 = v_0^2 + 2 a d[/tex]

Therefore Acceleration a

[tex]a'= v^2 / 2 d[/tex]

[tex]a'= 0.21m/s^2[/tex]

Generally the equation for Frictional force [tex]F_f[/tex] is mathematically given as

[tex]F_f=m*a[/tex]

[tex]F_f=m*(g-0.21)[/tex]

[tex]F_f=87.5*(9.81-0.21)[/tex]

Therefore

[tex]F_f=840N[/tex]

Answer:

F = 1071.08 N

Explanation:

Given that,

The radius of the circular track, r = 3.23 m

Speed of the car, v = 3.72 m/s

The mass of the car, m = 250 kg

We need to find the net force acting on it. The centripetal force will act on it and it is given by the relation as follows :

[tex]F=\dfrac{mv^2}{r}\\\\F=\dfrac{250\times (3.72)^2}{3.23}\\\\F=1071.08\ N[/tex]

So, the net force acting on the car is 1071.08 N.

Answer:

A,B,D

Explanation:

cause ik

Answer:

Salt water is more dense than freshwater

Explanation:

The only and best explanation for this phenomenon for this occurrence is that salt water is more dense than freshwater.

Answer:

the powar produced is 0.7 watts

Answer:

Length, gauge/size and composition

Explanation:

The longer the wire is the more resistance

The thinner the wire is more resistance

The difference in material effects the resistance ie. copper versus aluminium.

Answer:

hm

Explanation:

facil

Answer:

56400Joules

Explanation:

The quantity of heat required is expressed as;

Q = mL

m is the mass = 25g = 0.025kg

L is the latent heat of vaporization for steam = 2.256×10^6J/kg

Substitute into the formula as shown;

Q = 0.025×2.256×10^6

Q = 56400Joules

Hence the quantity of hear required is 56400Joules

The amount of heat transfer from the steam is of 56400 J.

Given data:

The mass of steam is, m = 25.0 g = 0.025 kg.

The latent heat of vaporization of steam is, [tex]L = 2.256 \times 10^{6} \;\rm J/kg[/tex].

When heat is to be given to a unit mass of substance to converts it from a liquid phase to vapor phase. Then it is known as Latent heat of vaporization. The amount of heat is expressed as,

[tex]Q = m \times L[/tex]

Solving as,

[tex]Q = 0.025 \times (2.256 \times 10^{6})\\\\Q = 56400 \;\rm J[/tex]

Thus, we can conclude that the amount of heat transfer from the steam is of 56400 J.

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Answer:

1) Adenine (A)   2. Uracil (U)   4) Cytosine (C)

Explanation:

"RNA consists of four nitrogenous bases: adenine, cytosine, uracil, and guanine."

Answer:

Explanation:

Their most intimate experience probably happened during an unsuccessful peace mission in September 1776. The British forces had recently raced across Long Island (New York) and almost destroyed the American Army. The British commander, Adm. Lord Richard Howe, then offered peace. Congress sent Adams, Franklin, and Edward Rutledge (South Carolina) to meet Howe on Staten Island.

Howe hoped to resolve the differences between what Great Britain still considered its colonies and the mother country. The Americans insisted on British recognition of independence, but Howe had no such authority, and Adams and Franklin had little of their own. Although cordial, the meeting broke up without success after just three hours.

During the mission, Adams and Franklin lodged together at crowded inn in a small room with only one window. Adams records an unforgettable and amusing story in his diary about that evening and hearing Franklin’s theory of colds.

Answer:

14

Explanation:

21miles/3=7

7*2=14

Answer:

[tex]E=101955.8volt/m[/tex]

The electric field direction is toward the right

Explanation:

From the question we are told that

Initial X-co-ordinate of proton [tex]X_1=20.0cm => \frac{20}{100}m[/tex]

Initial speed of Proton [tex]V_1= 3.5*10^6 m/s[/tex]

Final X-co-ordinate of proton [tex]X_2=80.0cm => \frac{80.0}{100}m[/tex]

Final speed of Proton [tex]V_2=0[/tex]

Generally the mass of Proton is given by

[tex]m_P=1.67*10^-27[/tex]

Generally the kinetic energy of the proton is mathematically given by

 [tex]K.E_p=1/2mv^2[/tex]

 [tex]K.E_p=1/2*1.6*10^-^2^7*(3.5*10^6)^2[/tex]

  [tex]K.E_p=9.8*10^-^1^5[/tex]

Generally the change in electric potential [tex]\triangle V[/tex] is mathematically given by

   [tex]\triangle V =\frac{K.E_p}{q}[/tex]

Charge on a proton [tex]q=1.602*10^-^1^9[/tex]

   [tex]\triangle V =\frac{9.8*10^-^1^5}{1.602*10^-^1^9}[/tex]

   [tex]\triangle V =61173.5volts[/tex]

Generally the equation for magnitude of an electric field is mathematically given by

  [tex]E=\frac{\triangle V}{\triangle d}[/tex]

Where

[tex]d=0.8m-0.2m\\d=0.6m[/tex]

Therefore

    [tex]E=\frac{61173.5}{0.8-0.2}[/tex]

    [tex]E=\frac{61173.5}{0.6}[/tex]

    [tex]E=101955.8volt/m[/tex]

The direction of the charge is towards the right

Given that,

Mass of a tribble, m = 2.5 kg

Radius, r = 1.4 m

The force on the tribble from the bucket does not exceed 10 times its weight.

To find,

The maximum tangential speed.

Solution,

The force acting on the tribble is equal to the centripetal force.

F = 10mg

The formula for the centripetal force is given by :

[tex]F=\dfrac{mv^2}{r}[/tex]

v is maximum tangential speed

[tex]v=\sqrt{\dfrac{Fr}{m}} \\\\v=\sqrt{\dfrac{mgr}{m}} \\\\v=\sqrt{{10gr}} \\\\v=\sqrt{10\times 9.8\times 1.4} \\\\v=11.7\ m/s[/tex]

So, the maximum tangential speed is 11.7 m/s.

Answer:

The Potential Energy of the stretched spring is = 1.975 J

Explanation:

Recall that the potential energy of a spring of constant k stretched x\a distance x is given by the formula:

U = 1/2  k x^2

Therefore in our case, converting the stretch from cm of meters (0.05 m), this is

U = 1/2 * 79 * 0.05 J = 1.975 J

Answer:

a) 2.94 N

b) 4.90 N

Explanation:

Let us assume that the weight of the ball is 0.98 N

Solution:

a) An object’s gravitational potential energy depends on two factors which are height and its weight (or mass). The equation for gravitational potential energy (PE) is given as:  

Potential energy = weight (w) * height (h)

PE = wh

Potential energy at 2 m shelf = weight * height = 0.98 N * 2 m = 1.96 N

Potential energy at 5 m shelf = weight * height = 0.98 N * 5 m = 4.90 N

The work needed to lift the ball from the 2-m shelf to the 5-m shelf = Potential energy at 5 m shelf - Potential energy at 2 m shelf

The work needed to lift the ball from the 2-m shelf to the 5-m shelf = 4.90 N - 1.96 N = 2.94 N

b) Potential energy at 5 m shelf = weight * height = 0.98 N * 5 m = 4.90 N

Answer:

true lol its jist common sense

Answer: Seasonal migration is the movement of various species from one habitat to another during the year. Resource availability changes depending on seasonal fluctuations, which influence migration patterns. ... Many species, especially birds, migrate to warmer locations during the winter to escape poor environmental conditions.

Explanation:

Protist:

Virus:

Fungus:

A) AIDS

B) Histoplasmosis

C) Amoebic dysentery

Answer:

Protist: C) Amoebic dysentery

Virus: A) AIDS

Fungus: B) Histoplasmosis

Hope that helps

Answer: Insulator

Explanation:

An insulator is a material that restricts the flow of electricity or thermal energy.

Answer:

plastic or wood

Explanation:

Answer:

a) The tangential component of acceleration at the edge of the motor at  [tex]t = 1.5\,s[/tex] is -1.075 meters per square second.

b) The electric motor will take approximately 3.963 seconds to decrease its angular velocity by 75 %.

Explanation:

The angular aceleration of the electric motor ([tex]\alpha[/tex]), measured in radians per square second, as a function of time ([tex]t[/tex]), measured in seconds, is determined by the following formula:

[tex]\alpha = -10\cdot t\,\left[\frac{rad}{s^{2}} \right][/tex] (1)

The function for the angular velocity of the electric motor ([tex]\omega[/tex]), measured in radians per second, is found by integration:

[tex]\omega = \omega_{o} - 5\cdot t^{2}\,\left[\frac{rad}{s} \right][/tex] (2)

Where [tex]\omega_{o}[/tex] is the initial angular velocity, measured in radians per second.

a) The tangential component of aceleration ([tex]a_{t}[/tex]), measured in meters per square second, is defined by the following formula:

[tex]a_{t} = R\cdot \alpha[/tex] (3)

Where [tex]R[/tex] is the radius of the electric motor, measured in meters.

If we know that [tex]R = 7.165\times 10^{-2}\,m[/tex], [tex]\alpha = 10\cdot t[/tex] and [tex]t = 1.5\,s[/tex], then the tangential component of the acceleration at the edge of the motor is:

[tex]a_{t} = (7.165\times 10^{-2}\,m)\cdot (-10)\cdot (1.5\,s)[/tex]

[tex]a_{t} = -1.075\, \frac{m}{s^{2}}[/tex]

The tangential component of acceleration at the edge of the motor at  [tex]t = 1.5\,s[/tex] is -1.075 meters per square second.

b) If we know that [tex]\omega_{o} = 104.720\,\frac{rad}{s}[/tex] and [tex]\omega = 26.180\,\frac{rad}{s}[/tex], then the time needed is:

[tex]26.180\,\frac{rad}{s} = 104.720\,\frac{rad}{s}-5\cdot t^{2}[/tex]

[tex]5\cdot t^{2} = 104.720\,\frac{rad}{s}-26.180\,\frac{rad}{s}[/tex]

[tex]t^{2} = \frac{104.720\,\frac{rad}{s}-26.180\,\frac{rad}{s} }{5}[/tex]

[tex]t = \sqrt{\frac{104.720\,\frac{rad}{s}-26.180\,\frac{rad}{s} }{5} }[/tex]

[tex]t \approx 3.963\,s[/tex]

The electric motor will take approximately 3.963 seconds to decrease its angular velocity by 75 %.

Answer:

macule

Explanation:

its aa flat round areausually distingurished from its surroundung skin by its changed in color. smaller than 1cm  am small hemorrhage spot.

Answer:

its true

Explanation:

i took it

Answer:

speed  v = 0.148 m / s

velocity   v = 0

Explanation:

In this exercise we must be careful that the speed is a scalar and the speed is a vector, let's start by looking for the speed

           v = Δx /Δt

the distance traveled is x = 2d and the time taken is

           t = 7h 30 min

let's reduce to seconds

          t = 7 h 3600s / 1h + 30 min 60s / 1min = 27000 s

so the speed is

          v = 2d / 27000

to finish the calculation suppose a distance traveled d = 2000 m

          v = 2 2000/27000

          v = 0.148 m / s

this is the raides which is the speed module

Velocity is a vector,

          v = Dx / Dt

in this case the displacement is

           Dx = d -d

           Dx = 0

the total displacement is zero since it returns to the starting point, consequently the velocity is zero

          v = 0

bold is a vector

Answer:

summer

Explanation:

Answer:

Under assumption that all food energy that needs the horse is transformed into work, then the horse needs approximately 3 megajoules of food energy to work for 1 hour.

Explanation:

Since horse is working steadily, the power experimented by the horse ([tex]\dot W[/tex]), measured in watts, is at constant rate. Then, the work needed by the horse ([tex]W[/tex]), measured in joules, is equal to that power multiplied by time ([tex]\Delta t[/tex]), measured in seconds. That is:

[tex]W = \dot W\cdot \Delta t[/tex] (1)

If we know that [tex]\dot W = 750\,W[/tex] and [tex]\Delta t = 3600\,s[/tex], then the work needed for the horse is:

[tex]W = (750\,W)\cdot (3600\,s)[/tex]

[tex]W = 2.7\times 10^{6}\,J[/tex]

[tex]W = 2.7\,MJ[/tex]

Under assumption that all food energy that needs the horse is transformed into work, then the horse needs approximately 3 megajoules of food energy to work for 1 hour.

The five general principles from the APA are meant to: C. Guide and inspire good conduct.

Answer:

19.6m/s

Explanation:

Given parameters:

Initial velocity  = 0m/s

Time  = 2s

Unknown:

Average velocity  = ?

Solution:

We can use the final velocity of the ball before landing to determines its average velocity ;

 Using;

              v  = u + gt

v is the final velocity

u is the initial velocity

g is the acceleration due to gravity

t is the time

              v  = 0 + 9.8 x 2 = 19.6m/s