Answer:
c) burrow underground
a) false
a) save rain water
c) prevent animals eating it
Instead of leaves, most cacti have spines or scales (which are modified leaves). These spines and scales do not lose water through evaporation (unlike regular leaves, which lose a lot of water). The spines protect the cactus from predators (animals that would like to eat the cactus to obtain food and/or water).
b) false
What abiotic factors do humans need?
The most important abiotic factors include water, sunlight, oxygen, soil and temperature. Water (H2O) is a very important abiotic factor – it is often said that “water is life.” All living organisms need water. In fact, water makes up at least 50% of almost all living things
According to law of definite proportion, for a compound, elements always combine in fixed ratio by mass.
The formula of compound remains the same, let it be a_{x}b_{y} where, a and b are two different elements.
Since, the ratio of mass remains the same , calculate the ratio of masses of element a and b in both cases
\frac{a}{b}=\frac{15}{35}=\frac{10}{y}
rearranging,
y=\frac{10\times 35}{15}=23.3
Thus, mass of b produced will be 23.3 g.
Answer:
middle
Explanation:
When the stars are plotted on the Hertzsprung-Russell diagram, most of them fall into the curve called the main sequence. The main sequence stars are 'average' because many stars fall into this category, and these stars burn hydrogen into helium in their core, and they are relatively young ( age of a few billion years) .
Our sun sits in the middle of the main sequence curve in the HR- diagram, which means the it is a yellow dwarf star with a surface temperature of about 6000 K, it has an average size, and it is hot enough for hydrogen fusion—in other words a typical star.
Answer:
Greater the mass
Greater kinetic energy
Velocity
Greater kinetic energy
Mass and velocity
Explanation:
We know that kinetic energy of object
Where m=Mass of object
v=Velocity of object
Kinetic energy is directly proportional to mass and velocity of object.
When mass of object is greater then the object has greater kinetic energy when the mass of object is small then the object has small kinetic energy.
When the velocity of object is greater then the object has greater kinetic energy when the velocity of object is small then the object has small kinetic energy.
The greater the mass of an object moves,the greater the kinetic energy it has.
The greater the velocity of a moving object,the greater kinetic energy it has.
Kinetic energy depends on both mass and velocity of object.