Answer:
Explanation:
There are two major types of mixtures; homogeneous and heterogeneous mixtures.
Homogeneous mixture is a mixture in which its constituent particles are evenly distributed throughout the mixture. Examples are steel, bronze and air (as stated in the question). While heterogeneous mixture is a mixture in which it's constituent particles are not evenly distributed throughout the mixture. Example includes sand and water solution.
Salt water is an homogeneous mixture because the percentage of salt in a sample of salt from a particular mixture is the same in every other sample (of the same volume) of the same mixture.
From the above, we can deduce that air is an homogeneous mixture because a sample of air (in a particular area) will contain the same constituent by proportion as another sample of air (in the same area). This means that the percentage of oxygen, nitrogen, carbon dioxide, water vapour, argon and other substances in one sample of the air will be equal to the percentage of this constituents in the other sample of the air.
Same can be said about steel and bronze. For steel, each gram of the same steel will contain the same percentage of carbon and iron. And also, each gram of the same bronze will contain the same percentage of copper, tin and other metals present.
For better understanding, let's consider an heterogeneous mixture. A mixture of sand and water solution cannot have the same proportion throughout, this is because sand particles in some samples (of a particular volume) of a particular mixture will be different from sand particles in some other samples (of the same volume) of the same mixture.
Answer: The answer is C
Explanation: I just tried it
Answer:
c
Explanation:
Answer: To complete the process of digestion after the food is ingested by mouth.
Explanation:
The food that we eat is ingested by mouth and here the mechanical degradation of food takes place. This breaks down the food into smaller pieces.
Mouth also contains the enzyme that is responsible for the digestion of starch.
Then the food from the mouth reaches the stomach where various types of digestive juices and enzymes are secreted to digested the food.
Hence, mouth and stomach must be near in the digestive system.
lateral continuity
B.
horizontal continuity
C.
faunal succession
D.
geological succession
2. A light ball has more inertia than a heavy ball
3. The less momentum a bowling ball has, the easier it is for that ball to knock down pins.
4. A heavy bowling ball is easy to get rolling because of its inertia.
A baseball has more momentum than a tennis ball traveling at the same speed. A light ball has less inertia than a heavy ball. The less momentum a bowling ball has, the easier it is for that ball to knock down pins. A heavy bowling ball is easy to get rolling because of its inertia.
1. True. Momentum is the product of an object's mass and velocity. Since a baseball has more mass than a tennis ball while traveling at the same speed, it has more momentum.
2. False. Inertia is the resistance of an object to changes in its motion. It depends on an object's mass. So, a heavy ball has more inertia than a light ball.
3. False. The more momentum a bowling ball has, the easier it is for it to knock down pins. Momentum is directly proportional to the force at which the ball hits the pins.
4. True. Inertia is the tendency of an object to resist changes in its motion. A heavy bowling ball has more inertia, making it easier to get rolling.
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A adding batteries to the circuit
B removing its iron core
C increasing the current through the coil
D increasing the number of wire loops in the coil
Answer:
B. Removing its iron core
Explanation:
In an electromagnet role of its core is very important as it concentrate magnetic flux to make magnetic field more powerful. Generally core of electromagnet is made up of a ferromagnetic material or of a ferrimagnetic material such as iron. Adding batteries to the circuit and increasing the current through the coil and increasing loops in the coil will increase magnetic strength of an electromagnet.
Answer:
B. removing its iron core
Explanation:
The iron core inside of the wire coil increases the strength of an electromagnet. So removing the iron core would decrease the strength of an electromagnet.