Answer:
CH4
Explanation:
Combining hydrogen and carbon produces a group of organic compounds called hydrocarbons. Depending on the specific molecular formula, there can be many different types of hydrocarbons, such as the fuels propane and octane. The simplest hydrocarbon is methane, which has the chemical formula CH4.
Answer:
The precaution to take while observing Rhizopus under microscope is wear hand glovers as one must not touch the mould with bare hands, and if you do so, wash hands thoroughly afterwards. If anyone is having allergies like asthma, then one must keep away from the mould.
Explanation:
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I'm assuming the answer would be greenhouse gas.
Greenhouse gases are those that trap infrared radiation (from the sun) and contribute to the greenhouse effect.
Explanation:
Radioactive dating works on the principle that a radioactive isotope can decay into the stable daughter nuclei at a constant rate. Geologist generally use the principle for half life. Half life is the time required for half of the radioactive substance to decay. This is constant for a particular element.
Answer:
4 is gravitational force
Option B
Explanation:
This is a force diagram of a block on an inclined plane.
The force component is what makes up weight in the diagram. Weight is given as mass multiplied by the gravity.
Gravitational force acts downward and it is the force of attraction between all objects and the earth. It is directly proportional to mass.
Force 1 and 2 are both shear forces that acts parallel to the face of the incline. They are mostly expressed as frictional forces.
