Which explanation of the solar system best fits the observations of the planets and how they orbit the sun?A. The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets
B. The planets formed at the center of a collapsing spinning cloud of gas and dust
C. The sun and planets formed from a collapsing spinning cloud of gas and dust.
D. A comet hit the sun and sent off fragments the became the planets.
I'm pretty sure it's C?
Answers
Answer: C. The sun and planets formed from a collapsing spinning cloud of gas and dust.
Explanation:
The entire solar system was formed from solar nebula. A nebula is a cloud of dust and gases. When this cloud spins and contracts, a protostar is formed. The temperature rises and nuclear fusion kicks in forming a star. The rest of the matter forms planets and other celestial bodies of the star system. Similarly, the Sun was formed in solar nebula from collapsing of spinning cloud of dust and gas.
The dust and gas accumulate to form a solar nebula, which later on creates the star and the planets.
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large solar panels are expensive
the energy it collects is 100% clean and renewable
doesn't create energy under certain weather conditions
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that nobody ever knew about before. When that happens, they
ADD the new one to the list of known dwarf planets, and then the
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The correct answer to the question is : 9375 N.
CALCULATION:
As per the question, the mass of the car m = 1500 Kg.
The diametre of the circular track D = 200 m.
Hence, the radius of the circular path R =
=
= 100 m.
The velocity of the truck v = 25 m/s.
When a body moves in a circular path, the body needs a centripetal force which helps the body stick to the orbit. It acts along the radius and towards the centre.
Hence, the force acting on the car is centripetal force.
The magnitude of the centripetal force is calculated as -
Force F =
=
= 9375 N. [ANS}
The centripetal force is provided to the car in two ways. It is the friction which provides the necessary centripetal force. Sometimes friction is not sufficient. At that time, the road is banked to some extent which provides the necessary centripetal force.
Final answer:
The magnitude of the net force on the car is 9375 N, directed towards the center of the track. The net force is caused by the combination of the car's weight and the normal force of the road. These forces provide the necessary centripetal force to keep the car in its circular path.
Explanation:
The magnitude of the net force on the car can be calculated using the formula F = m×a, where m is the mass of the car and a is its acceleration. Since the car is moving in a circular path, its acceleration can be determined using the formula a = v^2/r, where v is the velocity of the car and r is the radius of the circular track. The direction of the net force is towards the center of the circular track, as it provides the necessary centripetal force to keep the car moving in a circular path.
Using the given values, the magnitude of the net force on the car is F = (1500 kg) × (25 m/s)^2 / (100 m) = 9375 N. The direction of the net force is towards the center of the circular track since it provides the centripetal force required to keep the car in its circular path.
The net force on the car is caused by two external forces: the weight of the car and the normal force of the road. The weight of the car acts vertically downwards, while the normal force of the road acts perpendicular to the surface. These two forces combine to provide the net force that keeps the car moving in a circular path.
Learn more about Net force here:
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A. -12,000
B. -14,000
C. -16,000
D. -18,000
Answers
Answer:
D. -18,000
Explanation:
Let's define impulse :
- Impulse is defined as the product of Force ( N ) applied on the body and the time of impact ( s ) or
- The change in momentum
hence in this question ,
kara is initially moving with the :
- velocity
= 11
- finally moving with velocity
= -2.5
(minus as she moves in the opposite direction )
therefore the initial momentum =
and the final momentum =
thus the change in momentum : -
= -3250-14300 = -17550 ≅ -18000
Polaris
B.
Sirius
C.
Betelgeuse
D.
Rigel
Answers
Answer:
Betelgeuse and Rigel
Explanation:
100% correct
Answers
current in the circuit decreases, unless the voltage is increased
to compensate for the greater resistance.