Nidhi pushed the plunger of syringe completely and dipped its needle in water. Then she slowly pulled the plunger while its needle was still immersed in water. Select the correct option regarding this.
A Water will move in the syringe when she pushed the plunger down due to air pressure.
B When she pushed the plunger down all the air moved out creating an empty space in syringe.
C Air outside the syringe exerted pressure on water causing it to move in when the plunger is pulled up.
D Both (B) and (C)
YEA IT IS C
The distance-time graph of motion of a cycle is shown in the figure. What is the average speed of cycle over a time period of 12 s?
A0.48 m s–1
B0.58 m s–1
C2.17 m s–1
D3.17 m s–1
Three identical seeds are planted and grown in identical pots of soil. All three pots
receive equal amounts of sunlight. The plants are watered once each day. Plant X is
given 20 mL of water. Plant Y is given 40 mL of water. Plant Z is given 60 mL of water.
The height of each plant is measured and recorded after ten days. Which question could
be answered by this experiment?
A How much space does a plant need to grow?
B How much soil does a plant need to grow?
C How much water will make a plant grow tallest?
D How much sunlight will make a plant grow tallest?