Answer:
0.168°C
Explanation:
The frictional force between the palms enables rubbing and initiates the heat deposed.
The energy generated per rub is;
The force × distance
Hence we have; 71.3 N×0.0750m
Hence for 11 rubs we have; 11× 71.3 N×0.0750m= 58.82J
Now this heat acquired by the tissue is the same as mass of tissue × specific heat capacity of tissue × temperature rise;
Expressed mathematically as;
58.82=0.100 kg×3500 J/(kg · °C)×∆T
∆T= 58.82/ 0.100 ×3500 =0.168°C
Answer:
Explanation:
Potential at a point near a charge = Q / 4πε₀ R
where Q is charge given , R is distance of point from the charge .
Q / 4πε₀ R = 40
Electric field E at A = -dV / dR
= .16 x 10⁻³ / 2 x 10⁻⁶
= .08 x 10³
= 80 N/C
E = Q / 4πε₀ R²
80 = Q / 4πε₀ R x R
80 = 40 / R
R = 40 / 80
= .5 m .
Answer:
a) 40 V
b) 69.23 V
c) 69.23 V
Explanation:
See attachment for solution
Answer:
Option A
Explanation:
From fundamental equation of motion
where v is the final velocity, u is the initial velocity, a is the acceleration of the body and s is the displacement.
Since the initial velocity is zero
Making acceleration, a the subject of the formula then
Substituting 5 m/s for v and 2.5 m for s then
a) They collide and stick to one another
b) Inside of the star called Sun. On the earth we don't have such materials that would withstand very high temperatures.
c) As it commonly happens today: boil water, get high-temperature steam, rotate turbine connected to a generator and get electricity
d) Sorry, I don't see any charts.
