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ss7ja [257]
3 years ago
12

The plum pudding model of the atom states that

Physics
2 answers:
sleet_krkn [62]3 years ago
6 0

Answer: the answer is D)

an atom is made up of electrons in a sea of positive charges.

hope this helps

Explanation: just took the test on enginuity

Alona [7]3 years ago
5 0

Plum pudding model states that electrons in an atom are distributed like how plums are on a pudding. In other words, randomly distributed along the atom with no specfic reason. But later this was proven wrong.

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A police siren sounds different as it comes close to you than when it moves away from you. what term explains how this happens?
Sholpan [36]
The answer is: b. the doppler effect
3 0
4 years ago
Read 2 more answers
Earth has a magnetic dipole moment of 8.0 × 1022 J/T. (a) What current would have to be produced in a single turn of wire extend
Bogdan [553]

Answer:

a

The current that would be produced is I = 6.26 *10 ^8 A

b

Yes this arrangement can be used to cancel out earths magnetic field at points well above the Earth's surface.This is because this current loop acts as a magnetic dipole for point above the earth surface  

c

No this arrangement can not be used to cancel out earths magnetic field at points on the Earth's surface .this because on the earth surface it shifts from its behavior as a magnetic dipole

Explanation:

    From the question we are told that

             The magnetic moment of earth is M = 8.0*10 ^{22} J/T

               The radius of earth generally has a value of R = 6378 *10^3 m

Magnetic moment is mathematically given as

                    M = IA

A is the area of the of the earth(assumption that the earth is circular ) and this evaluated as  

                     A = \pi R^2

Now making I the subject in the above formula

                  I = \frac{M}{A}

                     = \frac{M}{\pi R^2}

                     = \frac{8.0^10^{22}}{\pi (6378 *10^{3})^2}

                     = 6.26 *10^8 A

                   

5 0
3 years ago
If the mass of an object is 14 lbm, what is its weight, in lbf, at a location where g = 32.0 ft/s2?
mixas84 [53]

Using the formula:

w = m x g ....... eq1

here w is weight of the object.

m is mass of the object, and

g is the acceleration of gravity.

mass, m = 14 lbm (given)

acceleration of gravity, g= 32.0 ft/s^{2}

Now, substituting the values in equation (1):

w = 14lbm x 32.0 ft/s^{2} = 448 lbm ft/s^{2}

since, 1 lbf = 32.174 lbm ft/s^{2}

so, w = 448 x \frac{1}{32.174}

w = 13.924lbf

Hence, the mass of an object is 13.924 lbf.

To know more about such questions, visit:

brainly.com/question/10936674

#SPJ4

3 0
2 years ago
Please HELP ME If the motion of an object changes, what must be true about the forces acting on that object?
atroni [7]

Answer:

If there is a net force acting on an object, the object will have an acceleration and the object's velocity will change. ... Newton's second law states that for a particular force, the acceleration of an object is proportional to the net force and inversely proportional to the mass of the object.

Explanation:

4 0
3 years ago
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A 1000kg car is moving with a speed of 20m/s. Determine the net work required to move the
bonufazy [111]

Answer:

250,000 Joules

Explanation:

The work required is the amount of energy added, so the answer is the difference in kinetic energy before and after the acceleration of the car.  (The problem doesn't say it's flat where the car is, but well assume it since there is no information about an elevation change that would require us to concern ourselves with potential energy!)

W = E_final - E_initial

= 1/2 m v_final^2 - 1/2 m v_initial^2

= 1/2 m (v_final^2 - v_initial^2)

= 1/2 (1000 kg) ( (30 m/s)^2 - (20 m/s^2) )

= 1/2 (1000 kg) (500 m^2/s^2)

= 250,000 kg m^2/s^2

= 250,000 Joules

4 0
3 years ago
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