Answer
a) Electron is moving toward right and brought to rest it means that force should be in opposite direction of motion electron.
We know F = qE here q = -e so, Force will be F = - eE.
Force on electron will be acting in opposite direction so, the electric field direction will be towards Right.
b) we know,
Force on electron = Electric force
m a = eE
using equation of motion
v² = u² + 2 a s
0 = (5.5 x 10⁵)² - 2 x a x 0.05
e = 1.6 x 10⁻¹⁹ C
mass of electron, m = 9.1.09 x 10⁻³¹ Kg
now,
E = 17.22 N/C
hence, strength of electric field is equal to E = 17.22 N/C
Not much difference.
A covalent bond is formed between two elements of similar Electronegativity. Practically pure covalent bonds are possible only in homonuclear diatomics(O2,H2,etc.). All other strong bonds are either polar(considerable electronegativity difference) or ionic (very high electronegativity difference) in nature.
A covalent compound is simply one in which all the atoms are linked by covalent bonds. E
U need to set up n solve the general eqn for simple harmonic motion:
x" = -(k/m)x
solution is x(t) = (x0)*cos(wt) + (v0/w)*sin(wt)
where w=sqrt(k/m), x0 is x-position at t=0 and v0 is vel at t=0
u already calculated f in Q.2 and w = 2*pi*f
x0 is 0 as it starts at eqm
v0 is given at 5.1
so u have x(t)
vel is given by x'(t) = (x0)*(-w)*sin(wt) + (v0/w)*w*cos(wt)
substitute t=0.32, x0=0, v0=5.1 n w in the above, u can solve for v at t=0.32.
Answer:
Power = 100 Watts
Explanation:
Given the following data;
Workdone = 50 Joules
Time = 0.5 seconds
To find the power needed;
Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
Substituting into the formula, we have;
Power = 50/0.5
Power = 100 Watts