|
Can you give the example of spontaneous combustion, rapid combustion, and explosion
|
|
1
|
12707
|
June 17, 2019
|
|
Make sketches of animal and plant cells. State three differences between them
|
|
0
|
4266
|
March 24, 2018
|
|
State the differences between eukaryotes and prokaryotes
|
|
0
|
47108
|
March 24, 2018
|
|
Write short notes on the following. Cytoplasm Nucleus of a cell
|
|
0
|
12643
|
March 24, 2018
|
|
The size of the cells of an organism has no relation with the size of its body
|
|
0
|
4242
|
March 24, 2018
|
|
Why do plant cells have an additional layer surrounding the cell membrane?
|
|
0
|
2869
|
March 24, 2018
|
|
Cells consist of many organelles, yet we do not call any of these organelles as structural and functional unit of living organisms
|
|
0
|
5478
|
March 24, 2018
|
|
Explain why chloroplasts are found only in plant cells
|
|
0
|
14772
|
March 24, 2018
|
|
‘Cells are the basic structural units of living organisms’
|
|
0
|
15261
|
March 24, 2018
|
|
Where are chromosomes found in a cell? State their function
|
|
0
|
3522
|
March 24, 2018
|
|
Make a sketch of the human nerve cell. What function do nerve cells perform?
|
|
0
|
12303
|
March 24, 2018
|
|
Salma takes 15 minutes from her house to reach her school on a bicycle. If the bicycle has a speed of 2 m/s, calculate the distance between her house and the school
|
|
0
|
3750
|
March 23, 2018
|
|
The distance between two stations is 240 km. A train takes 4 hours to cover this distance. Calculate the speed of the train
|
|
0
|
15958
|
March 23, 2018
|
|
A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?
|
|
0
|
1968
|
March 23, 2018
|
|
With the help of an activity, explain how will you measure the time period of a simple pendulum
|
|
0
|
4004
|
March 23, 2018
|
|
Figure shows the distance-time graph for the motion of two vehicles A and B. Which one of them is moving faster?
|
|
0
|
8468
|
March 23, 2018
|
|
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 a.m
|
|
0
|
7247
|
March 23, 2018
|
|
Boojho goes to the football ground to play football
|
|
0
|
2590
|
March 23, 2018
|
|
Distance between Bholu’s and Golu’s house is 9 km
|
|
0
|
4412
|
March 23, 2018
|
|
Given below as figure is the distance-time graph of the motion of an object
|
|
0
|
3599
|
March 23, 2018
|
|
Show the shape of the distance-time graph for the motion in the following cases
|
|
0
|
7224
|
March 23, 2018
|
|
Suppose the two photographs, shown in figures given below
|
|
0
|
878
|
March 23, 2018
|
|
Classify the following as motion along a straight line, circular or oscillatory motion
|
|
0
|
761
|
March 23, 2018
|
|
Plot a distance-time graph of the tip of the second hand of a clock by selecting 4 points on x-axis and y-axis respectively. The circumference of the circle traced by the second hand is 64 cm
|
|
0
|
5279
|
March 23, 2018
|
|
Starting from A, Paheli moves along a rectangular path ABCD as shown in figure below. She takes 2 minutes to travel each side. Plot a distance-time graph and explain whether the motion is uniform or non-uniform
|
|
0
|
8735
|
March 23, 2018
|
|
A spaceship travels 36,000 km in one hour. Express its speed in km/s
|
|
0
|
2499
|
March 23, 2018
|
|
Complete the data of the table given below with the help of the distance-time graph given in figure
|
|
0
|
2115
|
March 23, 2018
|
|
Explain with the help of an example that the states of rest and motion are relative terms
|
|
0
|
1438
|
March 23, 2018
|
|
Distinguish between uniform and non-uniform motion
|
|
0
|
1280
|
March 23, 2018
|
|
Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch
|
|
0
|
4245
|
March 23, 2018
|