Answer:
1.)The field energy will increase.
The rest of the answers:
2.)The energy increases, and the lines of force are denser
3.) It points toward the field of earths magnetic poles.
4.) l, ll, and lll only
5.) ll, lV, l, lll
No velocity will not be changed
Why?
According to Newtons 1st law the velocity of a moving object remains unchanged unless a external force affect that.
1) describe the life cycle of a star before it collapses into a black hole.
1) describe the life cycle of a star before it collapses into a black hole.ans: A star's life cycle is determined by its mass. The larger its mass, the shorter its life cycle. A star's mass is determined by the amount of matter that is available in its nebula, the giant cloud of gas and dust from which it was born. Over time, the hydrogen gas in the nebula is pulled together by gravity and it begins to spin. As the gas spins faster, it heats up and becomes as a protostar. Eventually the temperature reaches 15,000,000 degrees and nuclear fusion occurs in the cloud's core. The cloud begins to glow brightly, contracts a little, and becomes stable. It is now a main sequence star and will remain in this stage, shining for millions to billions of years to come. This is the stage our Sun is at right now.
2) describe the life cycle of a star before it becomes a dwarf.
ans: The life cycle of a low mass star (left oval) and a high mass star (right oval). ... As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf.
3) what is the likely outcome of our sun?
ans: All stars die, and eventually — in about 5 billion years — our sun will, too. Once its supply of hydrogen is exhausted, the final, dramatic stages of its life will unfold, as our host star expands to become a red giant and then tears its body to pieces to condense into a white dwarf.
Answer:
Force (P) : Positive
Normal Force (Fn) : Zero
Weight (mg) : Zero
Kinetic Frictional Force (fk) : Negative
Explanation:
The work done by a force on an object is given by the following formula:
W = F.d
W = F d Cosθ
where,
W = Work Done
f = Force Applied
d = displacement
θ = Angle between force and displacement
<u>FOR FORCE (P)</u>:
Since, force P is parallel to the motion of the box. Therefore, θ = 0°
Hence,
W = P d Cos 0°
W = P d(1)
W = Pd
<u>Therefore, work done by force (P) is Positive.</u>
<u></u>
<u>FOR NORMAL FORCE (Fn) AND WEIGHT (W)</u>:
Since, normal force and weight are perpendicular to the motion of the box. Therefore, θ = 90°
Hence,
W = Fn d Cos 90°= mg d Cos 90°
W = Fn d(0) = mg d (0)
W = 0
<u>Therefore, work done by Normal Force (Fn) and Weight (mg) is Zero.</u>
<u></u>
<u>FOR KINETIC FRICTIONAL FORCE (fk)</u>:
Since, kinetic frictional force acts in the opposite direction of motion of the box. Therefore, θ = 180°
Hence,
W = fk d Cos 180°
W = fk d(-1)
W = -fk d
<u>Therefore, work done by Kinetic Frictional Force (fk) is Negative.</u>
<u></u>
