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skad [1K]
3 years ago
14

1. Magnetism comes from ____________________ inside the Earth.

Physics
1 answer:
olya-2409 [2.1K]3 years ago
5 0

Answer:

1. Magnetism comes from minerals found inside the Earth.

2. Iron, nickel, and cobalt does stick to magnets.

3. Moving electrons can produce electricity to make a magnet.

4. A compass works because Earth is magnetic.

5. In a magnet, the electrons are in a line.

6. A magnet has a north and south pole.

7. Two north poles will push away from each other.

8. An MRI is a test that uses magnets to see inside of the brain.

9. The Earth’s core is iron and nickel.

10. The north pole and south pole of a magnet attracts.

11. A magnetic field is formed when electricity is flowing.

12. When a compass faces north it is called a magnetic field.

13. Aurora Borealis are the solarwinds glowing at the North Pole.

14. Sunspots are caused by the sun’s magnetic field.

15. In a computer, the __________________________ chips are magnetic

Explanation:

In my class we watched "Bill Nye the Science Guy S02E01 Magnetism" first video that shows up

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A girl is sitting in a sled sliding horizontally along some snow (there is friction present).
Over [174]

Answer:

159 N

Explanation:

The force of friction, Fr is a product of coefficient of feiction and the normal force. Therefore, Fr=uN where N is the normal force and u is coefficient of friction. Here, we have two coefficients of friction but since it is sliding, then we use coefficient of kinetic energy. Substituting 0.25 for u and 636 N for N then

Fr=0.25*636=159 N

Therefore, the force of friction is equivalent to 159 N

4 0
3 years ago
When a charged particle moves at an angle of 11° with respect to a magnetic field, it experiences a magnetic force of magnitude
rosijanka [135]
1) F=q[vB], where q -> charge, v-> velocity, B-> magnetic field. [ , ] -> cross product.
2) f=q*v*B*sin(11°) {1}
3) 1.6f=q*v*B*sin(alpha) {2}
4) {2} / {1} -> 1.6=sin(alpha)/sin(11°) or sin(alpha)=1.6*sin(11°) --> alpha=arcsin (1.6*sin(11°))
So, alpha=17.7°=18°
5 0
3 years ago
A bus with a vertical wind shield moves horizontally
Katena32 [7]

Answer:

(3) 53°

Explanation:

We want to measure the angle that the rains form with the vertical wind shield, so we have to measure the angle relative to the vertical. This means that we can write the following equation

tan \theta = \frac{v_x}{v_y}

where

v_y = 30 km/h is the speed of the rain, which travels vertically

v_x = 40 km/h is the speed of the bus, which travels horizontally

Substituting, we find

\theta=tan^{-1}(\frac{40}{30})=53^{\circ}

8 0
3 years ago
4
Blizzard [7]

Answer:

0.2 J

Explanation:

The pendulum forms a right triangle, with hypotenuse of 50 cm and base of 30 cm.  The height of this triangle can be found with Pythagorean theorem:

c² = a² + b²

(50 cm)² = a² + (30 cm)²

a = 40 cm

The height of the triangle is 40 cm.  The height of the pendulum when it is at the bottom is 50 cm.  So the end of the pendulum is lifted by 10 cm.  Assuming the mass is concentrated at the end of the pendulum, the potential energy is:

PE = mgh

PE = (0.200 kg) (9.8 N/kg) (0.10 m)

PE = 0.196 J

Rounding to one significant figure, the potential energy is 0.2 J.

6 0
4 years ago
is it possible for the gravitational force between two 50-kg objects to be less than the gravitational force between a 59-kg obj
Eva8 [605]

OF COURSE !  

The gravitational force between two objects doesn't ONLY depend on the product of their masses.  It also depends on the distance between them.

I'm not even going to work out the numbers for my example.  I'm just going to state without proof that at the top of the 2nd frame, the gravitational force between you and your bowling ball is greater than the gravitational force between you and the whole darn Andromeda galaxy !  My reasoning is based on the fact that your bowling ball is maybe 1 foot from your center of mass, whereas the Andromeda galaxy is more like 2.5 million light years from it.  That right there is going to give your bowling ball a big advantage when it comes to gravity !

5 0
3 years ago
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