Answer:
648.40N
Explanation:
Centripetal acceleration is the acceleration of an object around a circular path. Centripetal for e acting on the combined mass is expressed as:
F = ma
F = mv²/r
m is the mass of the object = 143kg
v is the linear velocity = 13.8m/s
r is the radius = 42.0m
Substitute the given parameters into the formula;
F = 143*13.8²/42
F = 27,232.92/42
F = 648.40N
Hence the magnitude of the centripetal force acting on the combined mass is 648.40N
Answer:
Pressure = 20 MPa
Explanation:
Given:
Force acting on the shoe is, 
Area of shoe on which the force acts is, 
Now, first we convert the area into its standard unit of m².
We have the conversion factor as:
1 cm² = 
Therefore, the area of shoe in square meters is given as:
Now, pressure on the shoe is given as:
Plug in 100 N for 'F', 
for 'A' and solve for 'P'. This gives,
Now, we know that,
Therefore, the pressure acting on the shoe is 20 MPa.
Answer:
Explanation:
Light year is the distance , ray of light travels in one year at the speed of 186000 mi/s
Distance traveled by light in one year
= speed x time
186000 x 365 x 24 x 60 x 60 miles
= 5.8657 x 10¹² mi
the Earth – Sun distance in light- years.
= 92.9 × 10⁶ mi. / 5.8657 x 10¹² mi light years
= 15.84 x 10⁻⁶ light years
To calculate in terms of parsec
1 degree angle
= 60 x 60 second
π /180 radian = 60 x 60 second
1 second = 3.14 / 180 x 3600
= 4.84 x 10⁻⁶ rad
one parsec = 1AU / one second
92.9 × 10⁶ mi / one second
= 92.9 × 10⁶ mi / 4.84 x 10⁻⁶ rad
= 19.19 x 10¹² mi
the Earth – Sun distance in parsec.
= 92.9 × 10⁶ mi. / 19.19 x 10¹² parsec.
= 4.84 x 10⁻⁶ parsec.
It is because change in the Mass of the object balances the change in the Volume of the object equally...........
Answer:
So, according to Einstein's special relativity a person on Mars observe the light to be traveling at c = 3 x 10⁸ m/s.
Explanation:
The special theory of relativity has two main postulates:
1- <u>VALIDITY OF PHYSICAL LAWS</u>
The laws of physics such as Newton's Laws and Maxwell's Equations are valid in all inertial frame of references.
2- <u>CONSTANCY OF SPEED OF LIGHT</u>
The speed of light in vacuum is the same for all observers in uniform translational relative motion, and it is independent of the motion of the source or the observer. Thus, speed of light is a universal constant and its value is c = 3 x 10⁸ m/s.
<u>So, according to Einstein's special relativity a person on Mars observe the light to be traveling at c = 3 x 10⁸ m/s.</u>
