Answer:
Part a)
Part b)
direction = downwards
Explanation:
As we know that the negative charge will experience the force due to some other charge below it
the force is given as
now we know that
now plug in all data
since this is a repulsion force so it must be a negative charge
Part b)
As per Newton's III law it will exert equal and opposite force on it
So here the force on the charge below it will be same in magnitude but opposite in direction
so here we have
direction = downwards
plants look green in sunlight because, all other colors except green are absorbed by the plants and only green color is reflected back, hence plants look green in sunlight.
The element Rubidium has 31 protons and 37 neutrons.
Answer:
0.192 g of ice will melt.
Explanation:
Applying the law of conservation of energy to the given situation, we get:
Heat Energy lost by Bullet + Kinetic Energy of Bullet = Heat Gained by Ice
m₁CΔT + (1/2)m₁v² = m₂L
where,
m₁ = mass of bullet = 2.55 g = 2.55 x 10⁻³ kg
C = specific heat of lead = 128 J/kg
ΔT = Difference in temperature of bullet and ice = 21.2°C
v = speed of bullet = 212 m/s
L = latent heat of fusion o water = 3.33 x 10⁵ J/kg °C
Therefore,
(2.55 x 10⁻³ kg)(128 J/kg °C)(21.2°C) + (1/2)(2.55 x 10⁻³ kg)(212 m/s)² = m₂(3.33 x 10⁵ J/kg)
m₂ = 64.22 J/3.33 x 10⁵ J/kg
<u>m₂ = 1.92 x 10⁻⁴ kg = 0.192 g</u>
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