Answer:
45.13 beats/min
Explanation:
Speed of space vehicle = 0.51c
the pulse rate measured by the astronaut= 61.0 beats per minute
Pulse rate measured by the Earth observer is given by

putting vales we get

= 45.13 beats/min
Answer:
A force unit is defined as the product of a mass unit and a unit of acceleration.
Answer:
Explanation:
momentum is written as p
p = mass * velocity
p = mv
30 km per hr = 30 * 1000 meters per 3600 seconds
velocity = 30000 meters per 3600 seconds
p = mv
p = 75 * 30000 / 3600
p = 625 kilogram per meter second
I hope my answer helps you and is correct
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Answer:
Mg Cosθ
Explanation:
mass of block = M
Angle of inclination = θ
coefficient of friction = μk
The force of gravity acts of the block is Mg
there are two components of the weight
the component parallel to the inclined plane is Mg Sinθ
the component perpendicular to the plane of inclined is Mg Cosθ
So, the normal force exerted by the inclined is Mg Cosθ