Answer:
apparent position = 26.6 cm
and size is same of coin because we observe it directly above of the coin
Explanation:
given data
diameter = 2 cm
depth = 20 cm
refractive index of water = 1.33
to find out
apparent position and size
solution
we know refractive index of air is 1
so apparent position of coin formula is
apparent position = ..........................1
put here value in equation 1
apparent position =
apparent position = 26.6 cm
and size is same of coin because we observe it directly above of the coin
Answer:
1) Mass is a measurement of the amount of matter something contains, while Weight is the measurement of the pull of gravity on an object. 2) Mass is measured by using a balance comparing a known amount of matter to an unknown amount of matter. Weight is measured on a scale.
Explanation:
Answer:
500 N
Explanation:
Given;
Mass of the car, M = 1000 kg
initial speed of the car, u = 0 m/s
Final speed of the car, v = 60 m/s
Time, t = 1 min = 60 s
Now,
Force, F is given as:
F = Ma
where,
a is the acceleration
From the Newton's equation of motion, we have
v = u + at
on substituting the values, we get
60 = 0 + a × 60
or
a = 1 m/s²
Thus,
Force = 1000 × 1 = 1000 N
now,
this force will be equal to the friction force provided by the rear wheels
let the friction force on a single rear wheel be 'f'
thus,
2f = 1000 N
or
f = 500 N
Answer:
Voltage across element X is 49.26 volts
Explanation:
The kirchhoff's voltage law states that the algebraic sum of voltages around a closed loop is equal to zero.
Applying the kirchhoff's voltage law in loop yields,
-160 + V₁ + V₂ + V₃ + Vₓ + 60 + V₄ = 0
-160 + 60 + V₁ + V₂ + V₃ + Vₓ + V₄ = 0
But we know that V = IR
-100 + IR₁ + IR₂ + IR₃ + IRₓ + IR₄ = 0
IR₁ + IR₂ + IR₃ + IRₓ + IR₄ = 100
I(R₁ + R₂ + R₃ + Rₓ + R₄) = 100
I = 100/(R₁ + R₂ + R₃ + Rₓ + R₄)
Substitute the given resistor values
I = 100/(18k + 20k + 45k + 100k + 20k)
I = 100/203k
I = 100/203×10³
I = 0.0004926 A
The voltage drop at element x is
Vₓ = IRₓ
Vₓ = 0.0004926*100×10³
Vₓ = 49.26 V