I think its b because when there is unbalanced forces it accelerates.
Hope this helps you out
That's false.
The definition of momentum is (mass) x (speed), so they must be multiplied.
"20,000 kg-m/s" has the correct units resulting from multiplication, but the number could only be the result of division.
Mountaineers wear shoes called approach shoes or rock shoes. They are spiky on the rough. They wear them to increase the action of friction on the ground.
Answer: c) 90 m/s
Explanation:
Given
Invest velocity, v1 = 250 m/s
Inlet specific enthalpy, h1 = 270.11 kJ/kg = 270110 J/kg
Outlet specific enthalpy, h2 = 297.31 kJ/kg = 297310 J/kg
Outlet velocity, v2 = ?
0 = Q(cv) - W(cv) + m[(h1 - h2) + 1/2(v1² - v2²) + g(z1 - z2)]
0 = Q(cv) + m[(h1 - h2) + 1/2(v1² - v2²)]
0 = [(h1 - h2) + 1/2(v1² - v2²)]
Substituting the values of the above, we get
0 = [(270110 - 297310) + 1/2 ( 250² - v²)
0 = [-27200 + 1/2 (62500 - v²)]
27200 = 1/2 (62500 - v²)
54400 = 62500 - v²
v² = 62500 - 54400
v² = 8100
v = √8100
v = 90 m/s
Answer:
6.45 x 10-7 meters
Explanation:
Taking speed of light as 300000000 m/s
We know that speed of light is product of wavelength and frequency and expressed as
s=fw
Where s represent speed, f is frequency and w is wavelength
Substituting 4.65*10^14 Hz for frequency then the wavelngth will be given by
300000000=4.65*10^14 *w
w=300000000÷4.65*10^14
w=6.451612903225*10^-7 m
Rounded off, the wavelength is 6.45 x 10-7 meters
