A moment causes a rotation about or axis. If the moment is to be taken about a point due to a force F, then in order for a moment to develop, the line of action cannot pass through that point...... the total moment was zero because the moment arm was zero as well
The unit measurement for sound can be expressed in terms of intensity and in decibels. The intensity of sound is the measure of its power over unit area. The common unit of measurement is in decibels. This is commonly used in measuring the extent of noise. The conversion from intensity to the decibel unit is through logarithmic function. The formula is:
dB = 10 log(I/I0), where I0 is 10^-12 Watts per square meter
Substituting the values to the equation,
84 = 10log(I/10^-12)
I = 0.0002512 W/m2
In scientific notation the intensity is 2.512 x 10^-4 W/m^2.
Answer:
714.286 kg
General Formulas and Concepts:
Physics 1
- Fg = mg
Fg is gravitational force in Newtons
m is the mass of the object in kilograms
g is the gravitational acceleration of Earth: 9.8 m/s^2
Step-by-step explanation:
Step 1: Define
7000 N = Fg
g = 9.8 m/s^2
Step 2: Solve for m
1. Substitute: 7000 N = m(9.8 m/s^2)
2. Isolate m: 714.286 kg = m
Answer:
Explanation:
Let the temperature of interface be θ
In steady state , rate of heat flow in the two mediums will be equal.
Rate of heat flow in thick layer
= .05 A ( 25 - θ ) / 50 x 10⁻³
Rate of heat flow in thin layer
.1 x A ( θ + 10 ) / 25 X 10⁻³
.05 A ( 25 - θ ) / 50 x 10⁻³ = .1 x A ( θ + 10 ) / 25 X 10⁻³
.05 X ( 25 - θ ) / 2 = 0.1 ( θ + 10 )
05 X ( 25 - θ ) = .2 ( θ + 10 )
1.25 - .05 θ = .2 θ +2
- 0.75 = .25 θ
θ = - 3 degree only