Answer
given,
Air speed, v = 20 m/s
Pressure gradient, = 105 N/m³
distance,dl = 0.5 m
density of air = 1.23 kg/m³
Airspeed at 0.5 m = ?
relation between pressure gradient and speed changed
neglecting the gravity
Speed of the air at 0.5 m
V = 20 - 2.13
V = 17.87 m/s
Hence, the speed of air is equal to V = 17.87 m/s
When there is no change in chemical composition of a substance then it is known as physical change. When we say that mass is conserved during a physical change then it means that total mass of the substance or object will remain the same from beginning till the end.
Answer:
The maximum temperature rise = 0.047 °C
Explanation:
Potential Energy, P = mgh
Energy transfered, Q=mcΔT
Potential energy = Energy transfered
mgh = mcΔT
gh = cΔT
ΔT = gh/c
ΔT = (9.81 * 20) / 4186
ΔT = 0.047 °C
Answer:
0.316 m.
Explanation:
Frequency, f = 0.19 Hz
Using curcular motion equation,
ω = 2π*f
= 1.19 rad/s
Maximum acceleration, a(max) = 2.3 % *9.8m/s^2
= 0.023 * 9.8
= 0.225 m/s^2
In simple harmomic motion,
a(max) = A*ω^2
Where,
A = amplitude
= 0.225/1.19^2
= 0.158 m
2A = 0.316 m.
Answer:
a. 4.25 J
b. -14.90 J
Explanation:
a. Gravitational potential energy of stone-earth system before stone is released
E = MGY
M = mass = 0.31
G = gravity = 9.81
Y = 1.4
E = 0.31 x 9.81 x 1.4
E = 4.25J
b. Gravitational potential energy of stone-earth system when it reaches bottom of well
E = MGY
M= 0.31
G = 9.81
Y = -4.9
E = 0.31 x 9.81 x -4.9
E = -14.90 J
This answers the question.