B. located in the atom's nucleus.
Explanation:
Rutherford's experiment using a beam of alpha particles aimed at a sheet of gold foil led him to conclude that an atom's mass is located in the atom's nucleus.
- In his experiment, he bombarded a thin gold foil with alpha particles.
- He found that most of the alpha particles passed through the foil while a few of them were deflected back.
To explain this, he suggested an atomic model(nuclear model) in which an atom is made up of a small positively charged center or nucleus.
The mass is concentrated in the nucleus.
A large space containing electrons further surrounds the nucleus.
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Specific heat capacity= m c Δ t
= 20 * 0.11* (75-25)
= 20* 0.11* 50
= 110 calories.
Answer:
Explanation:
The question relates to Doppler effect and beat.
The observer is moving towards the reflected sound so apparent frequency will be increased
f = f₀ x (V + v₁) / (V - v₂)
f is apparent frequency , f₀ is real frequency , V is velocity of sound , v₁ is velocity of observer and v₂ is velocity of source . Here
v₁ = v₂ = vp as both observer and source have same velocity
f = f₀ x (V + v₁) / (V - v₂)
205 +5 = 205 x (344 +vp)/ ( 344 - vp)
1.0234 = (344 +vp)/ ( 344 - vp)
= 352 - 1.0234vp = 340+vp
12 / 2.0234vp
vp = 6 m /s approx.
Final velocity = Vf=0 <span>
Initial velocity = Vi = 9.5m/s
Acceleration = a = -4.6m/s</span>²<span>
Time = t =? </span>
Now use the formula;<span>
Vf=Vi+at
<span>0=9.5 - 4.6m/s</span></span>²t
<span>
-9.5 = -4.6m/s</span>²(t)
9.5/4.6 = t<span>
<span>T= 2.01s</span></span>