PHYSICS HIGH SCHOOL

Magnetism is aA) force.

B) power.

C) form of energy.

D) form of electricity.

Answers

Answer 1
Answer:

Answer: The correct answer is "force".

Explanation:

Magnet has two poles: South pole and North pole.

Magnetic field lines are the surrounding around the magnet in which magnetic force can be experienced.

Like poles repel each other. There is force of repulsion between like poles. Unlike poles attract each other. There is force of attraction between the opposite poles.

Magnetism is a force. It is not a power. The power is the rate of doing work.

Magnetism is not a form energy.

Therefore, the correct option is (A).
Answer 2
Answer: your answer would be a, it is a  force.

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Which of the following subsets of R³ are actually subspaces? (a) The plane of vectors (b1,b2,b3) with b1=b2 (b) The plane of vectors with b1=1 (c) The vectors with b1b2b3=0 .
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A a0 is the amount of heat needed to raise the temperature of one kilogram of water one degree centigrade.
Which of the items has the least inertia while at rest? A. penny. B. airplane. C. frog. D. dog.

Two objects with different masses collide and bounce back after an elastic collision. Before the collision, thetwo objects were moving at velocities equal in magnitude but opposite in direction. After the collision,
A. the less massive object had gained momentum.
B. the more massive object had gained momentum.
C. both objects had the same momentum.
D. both objects lost momentum.

Answers

The more massive object will lose momentum after collision while the less massive object will gain momentum after collision.

  • Let the mass of the first object = m₁
  • Let the mass of the second object = m₂
  • let the initial velocities of the two objects = u
  • let the final velocity of the first object after collision = v₁
  • Let the final velocity of the second object after collision = v₂

Apply theprinciple of conservation of linear momentum for elastic collision;

let the heavier object = m₁

m₁u + m₂(-u) = m₁(-v₁) + m₂v₂

m₁u  - m₂u = -m₁v₁ + m₂v₂

where;

m₁u and m₂u  are initial momentum of both objects before collision

m₁v₁ and  m₂v₂ are final momentum of both objects after collision

Thus, from the equation above we can conclude the following, the more massive object will lose momentum after collision while the less massive object will gain momentum after collision.

Learn more here:brainly.com/question/11214803

Answer:A

Explanation:

Given

mass of two objects are  m_1 and m_2

taking m_1>m_2

Suppose u_1  and  u_2 are the velocities of m_1 and

u_1=u and  u_2=-u

therefore after elastic collision velocity of m_1 and m_2/[tex] are [tex]v_1 and v_2

v_1=(m_1-m_2)/(m_1+m_2)\cdot u_1+(2m_2)/(m_1+m_2)\cdot u_2

v_2=(2m_1)/(m_1+m_2)\cdot u_1-(m_1-m_2)/(m_1+m_2)\cdot u_2

for u_1 and u_2

v_1=(m-m)/(m+m)\cdot u+(2m)/(m+m)\cdot (-u)

v_1=(m_1+m_2)/(m_1+m_2)\cdot u=u

v_2=(2m)/(m+m)\cdot u-(m-m)/(m+m)\cdot (-u)

v_2=(3m_1-m_2)/(m_1+m_2)\cdot u

v_2=u+2\cdot (m_1-m_2)/(m_1+m_2)\cdot u

so velocity of mass m_2 is more as compared to m_1

so less massive object gained some momentum

The earth-moon relationship is unique in many ways. It is the largest moon in the solar system relative to its host planet. The relative size between the earth and moon are so close, some refer to it as a ________ planet system. binary host lunar

Answers

The earth-moon relationship is unique in many ways. It is the largest moon in the solar system relative to its host planet. The relative size between theearth and moon are so close, some refer to it as a binary planet system. As it is simply a a relationship between a planet and its moon, the system is called a binary system.

The relative size of earth and moon are a little bit of close  in astronomical world.One can find unique relationship between two planetary systems i.e the earth and moon.

In astrophysics the term binary planet system refers to two planets.Here both the planets are of planetary masses.Two planetary bodies will be considered as the binary system if their sizes are proportional to each other and comparable.

Moon is the one satellite in the entire solar system which is larger than other satellites.The weight of the earth is 81 times more than the weight of earth and it is just 384000 km away from earth .Ideally it can not be considered as binary planet system.But it is considered as a binary planet system as their relative size are so close.

Hence the answer of this question is binary planet system.

Which was a testable idea that Ernest Rutherford developed in his experiments?- The positive charge in an atom is concentrated in one location.
- Atoms are not divisible into smaller particles.
- It is impossible to define the mass of an atom.
- The atom contains no particles that have a neutral charge.

Answers

Answer:

- The positive charge in an atom is concentrated in one location.

Explanation:

In Rutherford's experiment when alpha particles are projected towards the gold foil then he observed that major proportion of the alpha particles are moved out undeviating.

This shows that alpha particles which are positively charged are not repelled by other positive charge of nucleus as it is concentrated at small part of atom

because very few alpha particles are reflected back at 180 degree so he concluded that nucleus charge is concentrated at very small space

and that part is termed as nucleus.

so correct answer is

- The positive charge in an atom is concentrated in one location.
The answer is
The positive charge in an atom is concentrated in one location.

Two students are working together on an experiment that measures the effect of different liquid fertilizers on the thickness of plants’ stems. Which is most likely to result in the greatest amount of error in their scientific experiment?

Answers

In doing research or experiments, it is necessary that the variables applied on the test subjects are the same. In the problem, the factor that will most likely result in the greatest amount of error will be the plant subjects. Different plants have different growth rates, and their growth can be affected by the many variables such as sunlight, disturbance, location, etc.

Answer:

One student measures liquids for the experiment by holding the flask up at eye level. The other student measures liquids for the experiment while the flask sits on the table.

Explanation:

Just did the test

Light waves will bend when passing from one transparent substance to another unless: a. Constructive interference occurs/ b. Destructive interference occurs/ c. The light hits the substance at an angle of 60 degrees/ d. The light hits at an angle of 90 degrees

Answers

The correct answer is (d.) The light hits at an angle of 90 degrees. The light waves will bend whenever passing from one transparent substance to another unless the light is hitting at an angle of 90 degrees.

the answer is d.................

Which characteristic does an object with a constant acceleration always have?A. changing velocity
B. constant velocity
C. fast speed
D. slow speed

Answers

By definition, speed is the integral of acceleration with respect to time.

We have then:

v = \int\limits^t_0 {a} \, dt

As the acceleration is constant, then integrating we have:

v = a*t + vo

Where,

vo: constant of integration that corresponds to the initial velocity

We observe then that the speed varies linearly when the acceleration is constant .

Therefore, for constant acceleration, the velocity is changing.

Answer:

an object with a constant acceleration always have:

A. changing velocity

The characteristic that an object with constant acceleration will always have is Changing velocity 

Answer. . .
A. Changing Velocity corresponds with acceleration.

Good luck on your studies, hope this helps~ ^//^
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