When the reactants are heated, the average kinetic energy of the molecules increases. This means that more molecules are moving faster and hitting each other with more energy. If more molecules hit each other with enough energy to react, then the rate of the reaction increases.
Answer:
Explanation:
The calcite Crystal can be identified by carrying out an acid test on it. This is done by bringing it in contact with a weak acid which cause crack in it structure. Hence a little of carbondioxide gas is released.
Since diamond is the hardest object,it can be identified on a Mohs scale. Likewise it can be tested by bringing it in contact with a newspaper, if the letters on the paper are not seen, that shows it is a pure diamond.
Window glass is identified by the code on it.
While Quartz Crystal is identified by scratch test. When it is used to scratch all other softer stones and metal, it leaves mark on them.
Answer:
Echoes are the reflection of sound from relatively flat object that is far enough away that you can discern the time difference. Echoes are used to measure distance, velocity, and the shape of objects. Echoes off gratings result in an unusual pinging sound
7⁵ = 7 × 7× 7× 7× 7
= 16807
Answer:
E = (0, 0.299) N
Explanation:
Given,
- Charge
- Charge
- Distance of the first charge from the origin = (16m, 0)
- Distance of the second charge from the origin = (-9, 0)
- Point where the electric field required = (0, 12m)
Let 
be the angle of the electric fields by first and second charge at the point A.
Electric field by charge 
at point A,
Electric field by the charge 
at point A,
Now,
Net electric field in horizontal direction at point A
Net electric field in vertical direction at point A.
Hence, the net electric field at point A,
