1.Which newton's law describes inertia is proportional to mass? 1st or 2nd?
2.An object is on a slope, the graph of v-t shows that there is negative acceleration, how do you explain it ?
a) global temperature become lower
b) the earth warms up due to CFCs is a greenhouse gas
c) CFCs lead to ozone depletion and hence more ultraviolet rays come in so it is warmer CFCs is also a greenhouse gas
imaginge this:first there is a 10 degree celsius water. When we heat it , then its temperature will increase . Will its potential energy changes before it change of state
An object pin is placed 20cm in front of a convex lens which is 10 cm away from a plane mirror . An inverted image is found at the same position of the object(above the object).
What is the focal length?
thanks