What experimental evidence was provided for the nuclear model of the atom?

Answers

Answer 1

Answer:

The correct answer is:

Alpha particles bouncing off gold foil

Explanation:

The nuclear model. Atoms contain three sub-atomic particles termed protons, neutrons, and electrons. The protons and neutrons are determined in the nucleus at the center of the atom. The nucleus is surprisingly much less than the atom as a whole. The Rutherford Gold Foil Experiment conceded the first empirical confirmation that guided to the development of the nucleus of the atom as a small, dense, and positively charged atomic core.

Answer 2

Answer:

The nuclear model of atom was given by Rutherford. As per this model,the central part of every atom is a massive positive core, and it occupies the total mass of the atom .Around the nucleus, there are orbits in which electrons are revolving just like planets are revolving around the sun.

This evidence was provided by Rutherford's gold foil experiment.

As per this experiment, some alpha particles were deviated at an angle less than 90 degree when allowed to fall on a gold foil.Some alpha particles were deviated more than 90 degree.

One alpha particle out of 10000 particles directly retraced its path back i.e it was deviated at angle of 180 degree.

It is so because alpha particle is positively charged. The alpha particle will be deviated if it will suffer a repulsive force. Hence, the central part of atom is positively charged. As alpha particle comes back, it means the central part is very massive.

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A charge of +1.4 × 10Ò coulombs moves from point A to B. What is the potential difference between the two points if the work done on the charge is +3.4 × 10¥ joules?

Answers

The exponents in both data quantities needed to calculate the answer have been corrupted and misprinted, so no answer is possible. Proofreading was REALLY needed for this one, but alas . . .

What type of energy is involved when a river moves sediment and erodes its banks?a. chemical energy
b. gravitational energy
c. potential energy
d. kinetic energy

What happens as gravity pulls water down a slope?
a. Kinetic energy changes to potential energy.
b. Both kinetic and potential energy vanish.
c. Energy is stored for future use.
d. Potential energy changes to kinetic energy.

Answers

First question: The type of energy involved when a river moves sediment and erodes its banks is: option d. Kinetic energy. Kinetic energy is the energy associated with motion. A body (in this case the water) that moves has an energy associated with its motion that is proportional to the speed (exactly to the square of the speed). When the water collides with the banks it is the kinetic energy of the river that erodes it Second question: the answer is the option d. As gravity pulls water down a slope potential energy changes to knietic energy. This is the, water loses altitude and gains velocity. The potential energy. which is proportional to the height, decreases and the kinetic energy, which is proportional to the square of the speed, increases.

Answer:

Question A: D., or "kinetic energy".

Question B: D., or "Potential Energy changes to kinetic energy."

What’s the kinetic energy of the object? Use .Erica is competing in the shot put event at a track meet. She hurls a shot with a mass of 4 kilograms at a speed of 9 meters/second. The shot’s kinetic energy is joules.

Answers

The kinetic energy of an object varies directly with the square of the speed of an object. The required kinetic energy of the shot is f 162 J.

What is Kinetic Energy?

The energy possessed by an object by its motion is known as the object's kinetic energy. It depends on the speed and mass of the given object.

Given data -

The mass of shot put is, m = 4 kg.

The speed of shot put is, v = 9 m/s.

The mathematical expression for the kinetic energy of the shot put is,

$KE = (1)/(2) m v^(2)$

Solving as.

$KE = (1)/(2) * 4 * 9^(2)\n\nKE = 162 \;\rm J$

Thus, we can conclude that the required kinetic energy of the shot is of 162 J.

Learn more about the kinetic energy here:

brainly.com/question/999862

Answer:

We have: K.E. = mv² / 2

here, m = 4 Kg

v = 9 m/s

Substitute their values into the expression:

K.E. = (4)(9)² / 2

K.E. = (4)(81) / 2

K.E. = 324 / 2

K.E. = 162 Joules

Explanation:

In short answer: it would be K.E.=162 Joules

Why do the track runners start at different positions on the track?

Answers

Track runners start at different positions on the track to ensure that each runner covers the same distance during the race.

In track events, particularly in sprints, the distance to be covered is the same for all competitors (e.g., 100 meters, 200 meters, 400 meters, etc.).

To compensate for the curved shape of the track, which can create unequal distances for runners in outer lanes compared to those in inner lanes, runners start from staggered positions. The lanes closer to the inner part of the track have a smaller radius and, therefore, a shorter distance to cover in each lap compared to the outer lanes.

By starting at staggered positions, each runner has an equal distance to run during the race. This helps ensure fairness in the competition and eliminates the advantage that could be gained by running in a specific lane.

The starting positions are determined based on the lane number, with the innermost lane (lane 1) starting at the shortest distance from the finish line and the outermost lane starting at a greaterdistance to compensate for the curvature of the track. This ensures that all runners have an equal opportunity to perform at their best regardless of the lane they are assigned to.

Hence, Track runners start at different positions on the track to ensure that each runner covers the same distance during the race.

To know more about Track runners here

brainly.com/question/31134925

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Each lane is a different length for one lap. For example, the inside is shorter than than the outside.

A 1200 w microwave oven transforms 1.8x10(to the power of 5) J of energy while reheating some food. Calculate how long the food was in the microwave, in mins!? (Please show steps, thanks)

Answers

1200 watts = 1200 joules per second

(1.8 x 10⁵ joules) / (1,200 joules/sec) = 150 sec = 2.5 minutes

What is the exact meaning of croos section and cross sectional area of a conductor?

Answers

The cross section is the little tiny circle you see when you cut a wire
and look at the flat, cut end.

The cross-sectional area of the wire is the area of that little circle.
It's equal to

Area = (pi) x (1/4) x (Diameter of the wire)²

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