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4 years ago

What type of star is the sun?

Physics

2 answers:

SashulF [63]4 years ago

8 0

C. main sequence is what the test tells me.

Hope this helps

finlep [7]4 years ago

5 0

I believe the correct answer from the choices listed above is option B. The sun is a main sequence type of star. The sun is classified as a G2V star, sometimes referred to as a yellow dwarf. It is a Population I star in its main sequence. Hope this answers the question.

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A rifle with a weight of 40 N fires a 5.5-g bullet with a speed of 220 m/s.(a) Find the recoil speed of the rifle.

liubo4ka [24]

Answer:

0.2695/s

Explanation:

Using the formula for calculating impulse

Impulse = m(v-u) = Ft

M is the mass

v is the final velocity.

u is the initial velocity

F is the force

t is the time

Get the time;

t = m(v-u)/F

t = 0.0055(220)/40

t = 0.0275s

Get the speed of the rifle

v = u+gt.

v = 0+9.8(0.0275).

v = 0.2695m/s

Hence the speed of the rifle is 0.2695m/s

3 0

3 years ago

Why aren't humans as evolved as we think we are?

bezimeni [28]

Well there is many ways we are not evolved as much as we think we are from being we die from a lot of diseases to world hunger and other things to be honest humans are far from being really evolved in life we really need to focus on cures and solving world hunger and fighting among ourselves

Hope this helps

8 0

3 years ago

Two wires carrying equal currents exert a force ???????? on each other. (a) The current in each wire is doubled, while the dista

sweet-ann [11.9K]

a) The magnetic field created by a current-carrying wire is proportional to the current:

B ∝ I, B = magnetic field strength, I = current

The magnetic force acting on a current-carrying wire immersed in a magnetic field is proportional to the current and the magnetic field strength:

F ∝ IB, F = magnetic force, I = current, B = magnetic field strength

Let's focus on wire 1.

Since wire 2's current is doubled, wire 2 produces a magnetic field twice as strong as before.

Wire 1's current is also doubled, therefore we now have a wire having twice as strong a current immersed in twice as strong a magnetic field. The magnetic force on wire 1 (and you can make a similar argument for wire 2) will be four times as strong as before.

b) The general formula for the magnetic force acting on a current-carrying wire immersed in a magnetic field is given by:

F = IL×B

F = magnetic force vector

I = current

L = vector having a magnitude equal to wire length and representing direction of current

B = magnetic field vector

Note we are taking a cross product of the IL and B vectors, not the product of two scalar quantities.

The very nature of the cross product means that if L and B are parallel to each other, F = 0N

7 0

3 years ago

Identify each of the following as a conductors or insulators

algol13

Answer:

these are all insulators

5 0

4 years ago

Read 2 more answers

Charged particles posses a region of influence also called a (an)

Delvig [45]

Answer:(c)

Explanation:

Charge particle posses a region of influence called a filed i.e. Electric field.

It is a region around the charged particle such that other charge particle experiences force due to this field. The nature of force is decided by the charge on the particle creating an electric field.

For a positive charge, electric field lines emerge out of it, and for a negative charge, it acts as radially inwards.

6 0

3 years ago