Bowl shaped hollow top of the volcano is _______.
thought that vent and crater are same
Select an incorrect reason for separating components of a mixture.
A To separate two or more different but useful components.
B To remove undesirable and useless components.
C To remove pure or harmless components.
D To obtain pure sample of a substance.
answer should B because in A,C,D they are telling about to separate useful and useless components but in B they are telling to separate useless and useless component and so Bis incorrect from othar
Ashish shone a torch at a ball. The shadow of the ball is projected onto a screen as shown.
What could Ashish do to get a smaller
shadow of the ball on the screen?
1. Move the ball closer to the screen.
2. Move the torch further away from the ball.
3. Move the screen further away from the ball.
A 1 only
B 3 only
C 1 and 2 only
D 2 and 3 only
In my opinion Aas we move the ball closer to the screen , size of image should decrease. So 1 should be correct option.
Smita tied two similar sized air filled balloons P and Q on a rod and balanced it. Then she pricked balloon P to burst it. The rod bent towards the side where air filled balloon Q was tied What does it show?
A Air fills space.
B Air moves things.
C Air has weight.
D Air is odourless.
An object of mass m travelling to the right with velocity 2v collides with another object of mass 2m travelling to the left with velocity 3v as shown in the figure. After the collision, the objects stick together.
Which of the following options is correct regarding the total momentum (magnitude) and total kinetic energy of the two objects?
|B||6 mv||(1/2) mv2|
|C||4 mv||(8/3) mv2|
|D||4 mv||(4/3) mv2|
I want solution
Read the following statements and select the option that correctly identifies true (T) and false (F) ones.
(i) The number of petals and sepals in a flower is always equal.
(ii) Roots absorb water and minerals from the soil.
(iii) Stamen forms the innermost whorl of a flower.
(iv) Petiole is the short stalk attached to the leaf.
(v) Calyx and corolla form essential whorls of the plant.
The no. of petals and the the no. of sepals are always equal. For e.g. There are 5 petals
Which statement is incorrect about the flood?
AIt is caused due to rise in water level in rivers.
BIt destroys crops and people are rendered homeless.
CIts effects can be reduced by planting more trees.
DIt causes less damage in areas with wooden houses.