Answer:
200000 cm are in 2 km
Explanation:
Answer:
200000 cm are in 2 km
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b. malleable and ductile.
c. gases at room temperature.
d. shiny.
Unlike metals, many non-metals are malleable and ductile. Thus, the correct option is B.
Non-metals are those metals which lack all the metallic attributes which are found in metallic elements. The non-metals are good insulators of heat and electricity. They are mostly gases and sometimes also liquid. Some of the elements then are even solid at room temperature include Carbon, sulphur and phosphorus.
A malleable material is the material in which a thin sheet can be easily formed through hammering. Gold is the most malleable metal found in nature. In contrast, ductility can be defined as the ability of a solid material to deform under the tensile stress.
Therefore, the correct option is B.
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Answer:
Explanation:
Ionic bonds are formed by transfer of electrons between metal and non metals. Electronic configuration of calcium: Calcium atom will lose two electron to gain noble gas configuration and form calcium cation with +2 charge.
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B They evolve more quickly than native species.
C They have higher reproductive rates than native species.
D They have no population controls such as predators.
Answer:
Option (C)
Explanation:
Invasive species usually refer to those species that are new to an ecosystem and cause a great impact on the native species. It also affects the ecosystem, economy and the health of human beings. Examples of some invasive species are zebra mussels, killer algae, green crab and Asian carp.
These species are much stronger than the native species and they have the ability to grow at a much faster rate, increasing their population. This increasing rate of population creates a problem for them to survive in a new location.
Thus, the most appropriate answer is option (C).
Answer:
D
Explanation:
The other species had evolved to be able to survive the predators of the area over the years
Answer:
Work done by the force is 1000 Joules
Explanation:
The relation ship between the variables is as follows:
(Work W) = (Force F) x (Displacement d) = (Mass m) x (Accelleration a) x (Displacement d)
so:
nuclear energy
B.
electrical energy
C.
chemical energy
D.
sound energy
The correct answer to the question is : C). Chemical energy.
EXPLANATION:
A gas stove provides energy when the gas present inside it, is burnt.
The gas contained inside it are natural gases which contain chemical energy. When gases come under fire or electric spark, the chemical energy is converted into light and heat energy.
No nuclear, electric or sound energy are consumed in providing power .
Hence, the correct statement is chemical energy.
current in the flashlight?
Answer:
3 A
Explanation:
The relationship between voltage, current and resistance in a conductor is expressed by Ohm's law, which states that:
where:
V is the potential difference across the conductor
R is the resistance of the conductor
I is the current flowing through it
In this problem, for this flashlight we have:
V = 90 V is the potential difference
is the resistance of the flashlight
Solving for I, we find the current: