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3 years ago

Who discovered the strong nuclear force

Physics

2 answers:

Brilliant_brown [7]3 years ago

8 0

Answer:

James Chadwick

Explanation:

James Chadwick discovered that the nucleus of each atom contains neutrons in 1932. Shortly after this, Eugene Wigner suggested that the electromagnetic force is not involved in holding the nucleus together and that there are two different nuclear forces. We now refer to these as the strong and weak nuclear forces.

bezimeni [28]3 years ago

5 0

Answer:

James Chadwick

Explanation:

i just searched it up lol

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The work function of an element is the energy required to remove an electron from the surface of the solid. The work function fo

vichka [17]

Answer:

λ = 548.7 nm

Explanation:

Hi!

First we want to know how much energy we need to remove 1 electron from the surface of the solid:

218.1 kJ/mol => 218 100 J / (6.022 x 10^23) electrons

= 3.621 x 10^-19 J/electron

That is we need 3.621 x 10^-19 J to remove one electron

Now we can calculate the wavelength that a photon must have in order to have this energy:

E = (hc) / λ

λ = (hc) / Ε

where

h = 6,626070150(69) ×10 -34 Js (wikipedia)

c = 3 x10^8 m/s

hc = 1.987 x 10^-25 Jm

Therefore:

λ = ( 1.987 x 10^-25 /3.621 x 10^-19 ) m = 5.487 x 10^-7 m

λ = 548.7 nm

4 0

3 years ago

The ability to cause change is defined as:

ehidna [41]

The question is poorly written.
ALL of the choices cause a change in something.

A). Force causes a change in velocity.

B). and C). Power and energy cause changes requiring work.

D). Impulse causes a change in momentum.

5 0

4 years ago

The natural resistance of any object to change its speed is called _____.

Kay [80]

Answer: Inertia

Explanation: Objects to stay in motion or at rest unless there is an external unbalanced force aced upon the object.

3 0

4 years ago

A car of mass 2400kg accelerates from 10m/s to 30m/s if the force is 12000N what is the distance

leonid [27]

Explanation:

Initial velocity (u) = 10 m/s
Final velocity (v) = 30 m/s
Mass (m) = 2400 kg
Force (F) = 12000 N

Let us find the time taken first.

→ F = ma

Acceleration (a) = (v – u)/t

→ 12000 = 2400 × (30 – 10)/t

→ 12000 ÷ 2400 = (20)/t

→ 5 = 20/t

→ 5t = 20

→ t = 20 ÷ 5

→ t = 4 seconds

Now, find the acceleration.

→ a = (v – u)/t

→ a = (30 – 10)/4

→ a = 20/4

→ a = 5 m/s²

Now, by using the third equation of motion,

→ v² – u² = 2as

s = distance

→ (30)² – (10)² = 2 × 5 × s

→ 900 – 100 = 10s

→ 800 = 10s

→ 800 ÷ 10 = s

→ 80 m = s

Therefore, distance travelled is 80 m.

4 0

3 years ago

An ice skater spinning with outstretched arms has an angular speed of 5.0 rad/s . She tucks in her arms, decreasing her moment o

Artyom0805 [142]

Answer:

K_{f} / K₀ =1.12

Explanation:

This problem must work using the conservation of angular momentum (L), so that the moment is conserved in the system all the forces must be internal and therefore the torque is internal and the moment is conserved.

Initial moment. With arms outstretched

L₀ = I₀ w₀

the wo value is 5.0 rad / s

final moment. After he shrugs his arms

$L_{f}$ = I_{f} w_{f}

indicate that the moment of inertia decreases by 11%

I_{f} = I₀ - 0.11 I₀ = 0.89 I₀

L_{f} = L₀

I_{f} w_{f} = I₀ w₀

w_{f} = I₀ /I_{f} w₀

let's calculate

w_{f} = I₀ / 0.89 I₀ 5.0

w_{f} = 5.62 rad / s

Having these values we can calculate the change in kinetic energy

$K_{f}$ / K₀ = ½ I_{f} w_{f}² (½ I₀ w₀²)

K_{f} / K₀ = 0.89 I₀ / I₀ (5.62 / 5)²

K_{f} / K₀ =1.12

6 0

3 years ago