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SashulF [63]
4 years ago
15

Ruthford's theory was identified by

Physics
2 answers:
geniusboy [140]4 years ago
7 0
Ernest Rutherford disproved Thomson's theory of the atom in 1911 when he showed that atoms are mostly composed of empty space. Rutherford discovered this by firing alpha rays - helium nuclei - at a thin sheet of gold foil. ... The predicted results of Rutherford's experiment.
8090 [49]4 years ago
6 0

Answer:

your mom

Explanation:

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A batter hits a foul ball. The 0.140-kg baseball that was approaching him at 40.0 m/s leaves the bat at 30.0 m/s in a direction
Korvikt [17]

Answer:

The magnitude of the impulse delivered to the baseball is 7.0 Ns

Explanation:

Given;

mass of the foul ball, m = 0.14 kg

initial velocity, u = 40 m/s

final velocity, v = 30 m/s in perpendicular direction

Impulse is given as change in momentum;

initial momentum in horizontal direction, Pi = mu

Pi = 0.14 x 40 = 5.6 Ns

final momentum in perpendicular direction, Pf = mv

Pf = 0.14 x 30

Pf = 4.2 Ns

The resultant impulse is given by;

J² = 5.6² + 4.2²

J² = 49

J = √49

J = 7.0 Ns

Therefore, the magnitude of the impulse delivered to the baseball is 7.0 Ns

5 0
3 years ago
If you put something like a piece of cardboard between a magnet and an iron nail, the magnet still holds the nail in place, even
DENIUS [597]

Answer:

A magnet has a field having lines of force around it that moves through the air which is a nonpermeable medium that allows the passage of magnetic field lines of force. The cardboard is a similar nonpermeable medium and the magnetic lines of force pass through to induce magnetism in the iron nail which is a ferromagnetic material that becomes magnetized by the magnetic field from the magnet

The induced magnetism in the iron nails causes the reverse poles to form in the iron with the iron domain's induced north pole pointing in the direction of the south pole of the magnet and vice versa

The iron nail is then attracted to the magnet as like poles attract, thereby holding the iron nail in place with the cardboard in between, without direct contact between the nail and the magnet as the cardboard prevents the magnet from touching the iron nail held in place

Explanation:

3 0
3 years ago
Radio waves heading upward from Earth often bounce off the
charle [14.2K]

Answer:

Radio waves heading upward from Earth often bounce off the thermosphere-D.

7 0
3 years ago
Read 2 more answers
''The rays that seem to emanate from a virtual image do not in fact emanate from the image'' . Explain the statement
riadik2000 [5.3K]

Answer:

Suppose that you are looking at the reflex candle in one mirror.

The image in the mirror is called the "virtual image"

If the real candle is at a distance of, let's say, 5 meters from the mirror, then the virtual image in the mirror will be also 5 meters "inside" the mirror.

Now, the light that emanates from the candle in the reflex seems to come from the virtual image, 5 meters inside of the mirror, but this is obviously not the real case.

The rays come, originally, from the real candle, and then those rays are reflected in the surface of the mirror.

Then the rays of the virtual image actually come from the surface of the mirror and not from the virtual image itself

4 0
3 years ago
A record turntable rotates through 5.0 rad in 2.8 s as it is accelerated uniformly from rest. What is the angular velocity at th
Usimov [2.4K]

Answer:

\omega_f = 3.584\ rad/s

Explanation:

given,

turntable rotate to, θ = 5 rad

time, t = 2.8 s

initial angular speed  = 0 rad/s

final angular speed = ?

now, using equation of rotational motion

\theta = \omega_i t + \dfrac{1}{2}\alpha t^2

5 = 0+ \dfrac{1}{2}\alpha\times 2.8^2

\alpha= \dfrac{10}{2.8^2}

       α = 1.28 rad/s²

now, calculation of angular velocity

\omega_f = \omega_i + \alpha t

\omega_f =0 +1.28\times 2.8

\omega_f = 3.584\ rad/s

hence, the angular velocity at the end is equal to 3.584 rad/s

4 0
3 years ago
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