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Can you give the example of spontaneous combustion, rapid combustion, and explosion
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|
1
|
12700
|
June 17, 2019
|
|
Make sketches of animal and plant cells. State three differences between them
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0
|
4258
|
March 24, 2018
|
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State the differences between eukaryotes and prokaryotes
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0
|
46988
|
March 24, 2018
|
|
Write short notes on the following. Cytoplasm Nucleus of a cell
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0
|
12612
|
March 24, 2018
|
|
The size of the cells of an organism has no relation with the size of its body
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|
0
|
4231
|
March 24, 2018
|
|
Why do plant cells have an additional layer surrounding the cell membrane?
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|
0
|
2861
|
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
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0
|
5468
|
March 24, 2018
|
|
Explain why chloroplasts are found only in plant cells
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|
0
|
14766
|
March 24, 2018
|
|
‘Cells are the basic structural units of living organisms’
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|
0
|
15252
|
March 24, 2018
|
|
Where are chromosomes found in a cell? State their function
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0
|
3515
|
March 24, 2018
|
|
Make a sketch of the human nerve cell. What function do nerve cells perform?
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0
|
12290
|
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
|
3740
|
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
|
15950
|
March 23, 2018
|
|
A simple pendulum takes 32 s to complete 20 oscillations. What is the time period of the pendulum?
|
|
0
|
1962
|
March 23, 2018
|
|
With the help of an activity, explain how will you measure the time period of a simple pendulum
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0
|
3985
|
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
|
8439
|
March 23, 2018
|
|
The odometer of a car reads 57321.0 km when the clock shows the time 08:30 a.m
|
|
0
|
7235
|
March 23, 2018
|
|
Boojho goes to the football ground to play football
|
|
0
|
2582
|
March 23, 2018
|
|
Distance between Bholu’s and Golu’s house is 9 km
|
|
0
|
4402
|
March 23, 2018
|
|
Given below as figure is the distance-time graph of the motion of an object
|
|
0
|
3580
|
March 23, 2018
|
|
Show the shape of the distance-time graph for the motion in the following cases
|
|
0
|
7212
|
March 23, 2018
|
|
Suppose the two photographs, shown in figures given below
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|
0
|
871
|
March 23, 2018
|
|
Classify the following as motion along a straight line, circular or oscillatory motion
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|
0
|
756
|
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
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|
0
|
5259
|
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
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|
0
|
8704
|
March 23, 2018
|
|
A spaceship travels 36,000 km in one hour. Express its speed in km/s
|
|
0
|
2485
|
March 23, 2018
|
|
Complete the data of the table given below with the help of the distance-time graph given in figure
|
|
0
|
2096
|
March 23, 2018
|
|
Explain with the help of an example that the states of rest and motion are relative terms
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|
0
|
1429
|
March 23, 2018
|
|
Distinguish between uniform and non-uniform motion
|
|
0
|
1271
|
March 23, 2018
|
|
Distinguish between the following. Cell and Battery ,An Open Switch and A Close Switch
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|
0
|
4212
|
March 23, 2018
|