Why does range of motion need to be measured separately for each joint
1 answer:
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Answer:
(a). The velocity of star is and the direction of star toward the earth.
(b). The shift is 0.0168 nm.
Explanation:
Given that,
Wavelength of spectral line = 663 nm
Wavelength of spectral line in lab = 645 nm
(a). We need to calculate the velocity
Using doppler's effect
Where, = change in wavelength
v = velocity
c = speed of light
Put the value into the formula
The direction of star toward the earth.
(b). Speed = 7800 m/s
We need to calculate the shift
Using formula of shift
Put the value into the formula
This shift is small compare to the the movement of Earth around the sun.
Hence, (a). The velocity of star is and the direction of star toward the earth.
(b). The shift is 0.0168 nm.
Answer:
The correct option is
a. v =
Explanation:
Time at which the object start fall t = 0
The acceleration a is given by a = g - bV
Where V = Speed of the object
Speed V² = u² + 2·a·h
However with the drag force the object will approach terminal velocity as t becomes progressively larger whereby v will stop increasing
Option a. is the only option that has limiting value of v which is in the range of g as t increases ∴ option a. is the correct option.
v = as t increases
→ 1 s and v→ g/b m/s