Answer: the baseball bat transfor its energy in the ball.
Explanation: you hit it with one and find out and tell me what you think what happen.
Answer:
(B) 2AgCl + sunlight → Cl2 + 2Ag (decomposition reaction) is correct option.
There are a number of ways to reduce friction:
Make the surfaces smoother. Rough surfaces produce more friction and smooth surfaces reduce friction. Some swimmers wear suits to reduce underwater resistance. These suits mimic the smooth skin of sharks.
Lubrication is another way to make a surface smoother. A lubricant is a slippery substance designed to reduce the friction between surfaces. You might use oil to stop a door from squeaking - the oil reduces the friction in the hinge. Water can be used as a lubricant - think of how a floor becomes slippery after it has been mopped.
Make the object more streamlined. A streamline shape is one that allows air or water to flow around it easily, offering the least resistance. Compare a boxy old car with a new car that has a rounded shape, allowing it to move with less effort.
Reduce the forces acting on the surfaces. The stronger the forces acting on the surfaces, the higher the friction, so reducing the forces would reduce the friction. If you apply the handbrake when you try to drive a car, the car will have a lot of difficulty moving because of the force immobilising (stopping the movement of) the wheels. If you release the handbrake, the wheels will move more freely because there is no extra force acting on them.
Reduce the contact between the surfaces. Have you ever tried to roll a cube? Spheres are the best shape for reducing friction because very little of a spherical object is in contact with the other surface. Several types of wheels, such as skateboard wheels, contain small spheres called ball bearings to reduce the friction between the moving parts. You can witness the effect of ball bearings by comparing the friction between sliding a book on a table and then doing the same, but using marbles between the book and the surface of the table. Notice how the marbles act as ball bearings, reducing the friction.
The magnet's north pole would point to the Earth's south pole and the magnet's south pole would point to the Earth's north pole.
<u>Explanation</u>:
- There is a magnetic pole in the earth and the magnetic poles of the earth run using the equator and it has both the closures at the arctic pole and the Antarctic pole. The attractive positive field or the north pole is situated in the arctic zone and the south pole is situated in the Antarctic zone.
- The magnetic positive field or the north pole is situated in the arctic zone. Any magnet which is allowed to rotate whenever suspended on the outside of the earth will align itself with the magnetic field of the earth. That is the way the bar magnet orients itself comparative with this current planet's magnetic field.
The universe includes galaxies, the solar system, and planets. The accelerated expansion of the universe was provided by the Supernova Cosmology Project and High-Z Supernova Search Team. Thus, option B is correct.
<h3>What is Supernova Cosmology Project?</h3>
The Supernova Cosmology project in 1998, was to show the acceleration of the Universe's expansion. This project studied the acceleration rate of the universe that was expanding at a constant rate.
The Viking and Voyager missions were the first successful landing of spacecraft on the moon's surface. That didn't provide any information on the universe.
Therefore, option B. Supernova Cosmology Project provided evidence of the expansion.
Learn more about Supernova Cosmology Project here:
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