Answer:
Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field. Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.
Explanation:
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Answer:
D. transparent.
Explanation:
A material that transmits nearly all the light in a ray because it offers little resistance to the light is <u>transparent.</u>
A transparent material allows light to pass through them with little or no resistance enabling them see-through. A material that transmits nearly all the light rays that pass through it because it offers little resistance to the light is TRANSPARENT. Examples of transparent materials are water, glass (flint and crown), air, and diamond.
Answer:
299792458 meters per second (approximately 300000 km/s or 186000 mi/s)
Explanation:
The speed of light in vacuum, commonly denoted c, is a universal physical constant that is important in many areas of physics. Its exact value is defined as 299792458 meters per second (approximately 300000 km/s or 186000 mi/s).[Note 3] According to the special theory of relativity, c is the upper limit for the speed at which conventional matter, energy or any signal carrying information can travel through space.
Answer:
The sympathetic nervous system, part of the autonomic nervous system, also known as the involuntary system, is in charge of the fight-or-flight response, a response to the stress that leads to a hormonal cascade that boosts alertness and heart rate to prepare the body to respond.
Explanation:
(a) The angle the plane makes with respect to the horizontal is 27⁰.
(b) The magnitude of the normal force acting on the block is 135.3 N.
(c) The component of the force of gravity along the plane, fgx is 68.96 N.
(d) The expression for the net force on the block is mgsinθ - μmgcosθ = 0.
<h3>
Angle of the plane with respect to the horizontal</h3>
sin θ = h/L
where;
- θ is the angle of inclination
- h is height of the incline
- L is length of the plane
sin θ = 3.05/6.8
sin θ = 0.4485
θ = arc tan(0.4485)
θ = 26.7⁰
θ ≈ 27⁰
<h3>Normal force on the block</h3>
Fₙ = mgcosθ
Fₙ = (15.5)(9.8)cos(27)
Fₙ = 135.3 N
<h3>Parallel component of the force on the plane</h3>
Fx = mgsinθ
Fx = (15.5)(9.8) sin(27)
Fx = 68.96 N
<h3>Net force on the block</h3>
∑F = 0
Fx - Ff = 0
mgsinθ - μmgcosθ = 0
Thus, we can conclude the following;
- the angle the plane makes with respect to the horizontal is 27⁰,
- the magnitude of the normal force acting on the block is 135.3 N,
- the component of the force of gravity along the plane, fgx is 68.96 N, and
- the expression for the net force on the block is mgsinθ - μmgcosθ = 0.
Learn more about static friction here: brainly.com/question/13680415
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