Ask questions which are clear, concise and easy to understand.
Ask QuestionPosted by Ansh Jariwala 7 years, 1 month ago
- 0 answers
Posted by Akanksha Kumari? 7 years, 1 month ago
- 1 answers
Pranathi Potluri 7 years, 1 month ago
Posted by Avni Mishra 7 years, 1 month ago
- 1 answers
Akanksha Kumari? 7 years, 1 month ago
Posted by Aastha Singhal 7 years, 1 month ago
- 1 answers
Adhyayan Deshlahara 7 years, 1 month ago
Posted by Aastha Singhal 7 years, 1 month ago
- 1 answers
Adhyayan Deshlahara 7 years, 1 month ago
Posted by Nishith Kumar Pt 5 years, 11 months ago
- 0 answers
Posted by Aastha Singhal 7 years, 1 month ago
- 1 answers
Adhyayan Deshlahara 7 years, 1 month ago
Posted by Aastha Singhal 7 years, 1 month ago
- 2 answers
Yogita Ingle 7 years, 1 month ago
The conditions to hear an echo are
(i) The time interval between source sound and reflected sound must be atleast 0.1s.
(ii) The minimum distance between the obstacle and source of sound should be atleast 17.2 m.
Echo is a repetition of sound due to the reflection of original sound by a broad and hard obstacle.
Posted by Aastha Singhal 7 years, 1 month ago
- 2 answers
Yogita Ingle 7 years, 1 month ago
The basic properties of sound are: pitch, loudness and tone
Pitch : The frequency of a sound wave is what your ear understands as pitch. A higher frequency sound has a higher pitch, and a lower frequency sound has a lower pitch.
Loudness: The amplitude of a sound wave determines its loudness or volume. A larger amplitude means a louder sound, and a smaller amplitude means a softer sound.
Posted by Aastha Singhal 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
Protozoans are unicellular eukaryotic and heterotrophic organisms. Due to their motile nature and heterotrophic mode of nutrition they are considered relatives of animals. They are classified under Kingdom Protista as this kingdom includes all unicellular eukaryotic and heterotropic organisms whereas kingdom Animalia includes all multicellular eukaryotic and heterotrophic organisms.
Posted by Parveen Garg 7 years, 1 month ago
- 3 answers
Dev Khemani 7 years, 1 month ago
Dev Khemani 7 years, 1 month ago
Posted by Sunil Tewari 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
- The cells of meristematic tissue have the power of division, which mean these are the dividing tissues of the plant.
- In meristematic tissues, the cells are highly active, have dense cytoplasm, large nucleus, thin cytoplasm and vacuole smaller in size or may be absent.
- The new cells produced by meristematic cells are initially like meristem but later on maturation they differentiate into other tissues.
Posted by Monalisha Tiwari 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
- Ceaseless means perpetual or never ending.
- Ceaseless motion would mean motion without stopping.
- Example: Movement of planets
Posted by Rinki Barnwal 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
Nematoda
- The bodies of the organisms belonging to this group are bilaterally symmetrical and triploblastic.
- The body of these organisms is cylindrical.
- These organisms have tissues but no real organs.
- They have body cavity or a pseudocoelom in their body.
- Examples of animals belonging to this group are Ascaris, Wuchereria.
Posted by Rohan Mahajan 7 years, 1 month ago
- 2 answers
Yogita Ingle 7 years, 1 month ago
In a qualitative way, the tendency of undisturbed objects to stay at rest or to keep moving with the same velocity is called inertia.
Example 1: We tend to remain at rest with respect to the seat until the driver applies a braking force to stop the motorcar due to the inertia of motion.
Example2: The dust particles fly away from the blanket when we jerk it due to the inertia of rest.
Amit Kumar 7 years, 1 month ago
Posted by Sachin Kumar 7 years, 1 month ago
- 2 answers
Posted by Abhay Verma 7 years, 1 month ago
- 2 answers
Amit Kumar 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
Earth’s acceleration due to gravity acts on every object on earth and produces a force on it that acts towards the centre of the earth. Value of gravity g on earth is about 9.81 m/s2.
Posted by Status World 7 years, 1 month ago
- 2 answers
Yogita Ingle 7 years, 1 month ago
Newton's Second Law of motion states that the rate of change of momentum of an object is proportional to the applied unbalanced force in the direction of the force.
F = ma
Where F is the force applied, m is the mass of the body, and a, the acceleration produced.
Akanksha Kumari? 7 years, 1 month ago
Posted by Pushpendra Nigam 5 years, 11 months ago
- 0 answers
Posted by Shivrin Vasan 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
Compounds which are produced by the combination of metals and non-metals contain charged species known as ions. A negatively charged ion is called an anion and a positively charged ion is known as a cation. Examples of ionic compounds are sodium chloride and calcium oxide. Atoms of different elements combine together in definite proportion to form molecules of compounds. Examples — ammonia, water and carbon dioxide.
Posted by Tripti Kaur 7 years, 1 month ago
- 0 answers
Posted by Bharti Chauhan 7 years, 1 month ago
- 3 answers
Yogita Ingle 7 years, 1 month ago
Tea leaves from tea by filtration. As tea granules are smaller than the leaves, it can be separated by filtration such that the granules pass through, and leaves are left behind. Also, handpicking of the leaves may be used to separate them as well, under some conditions.
Posted by Akanksha Kumari? 7 years, 1 month ago
- 2 answers
Amit Kumar 7 years, 1 month ago
Palak ?? 7 years, 1 month ago
Posted by Akanksha Kumari? 7 years, 1 month ago
- 1 answers
Palak Gaba 7 years, 1 month ago
Posted by Vivek Yadav 7 years, 1 month ago
- 3 answers
Tripti Kaur 7 years, 1 month ago
Posted by Ujjwal Aggarwal 7 years, 1 month ago
- 3 answers
Aastha Singhal 7 years, 1 month ago
Yogita Ingle 7 years, 1 month ago
- The presence of excessive nutrients in the lake due to agriculture run -off from the land, cause the growth of plant life in water body. Fertilizers contain phosphates that increase algae growth in water.
- Algae cover the surface of water, blocking sunlight and depleting oxygen in the water.
- The reduction of oxygen concentration in water causes the death of many aquatic organisms.
- This process of rapid plant growth in water and the depletion of oxygen causing the death of animals results in a disfunctioning ecosystem, called eutrophication.
Posted by Aditya Giradkar 7 years, 1 month ago
- 1 answers
Yogita Ingle 7 years, 1 month ago
A mole of a defined substance is defined as the mass of that substance containing the same number of fundamental units just like atoms in 12.0 g of 12C. These fundamental units can be atoms, molecules, or formula units based on the substance. It represents the number of chemical elements.One mole of any substance is equal to the Avogadro number whose value is 6.023 x 1023. It can be used to measure the products in a chemical reaction. The unit is defined denoted by mol.
The number of moles formula is given by
number of moles = mass of substance/ mass of one mole
Posted by Pankaj Yadav 7 years, 1 month ago
- 2 answers
Ram Kushwah 7 years, 1 month ago
as u=0
v=at
v=30 m/s=30 x60=1800 m/min
so a=v/t
=1800/30=60 m/min sqr
Yogita Ingle 7 years, 1 month ago
Given :
Initial Velocity = u = 0m/s
Final velocity= V= 30 km/h
Time = 30 min =1/2 h
acceleration=a=?
As we know that , a=v-u/t
⇒a=30 - 0/1/2
=30× 2
= 60 km/h²
myCBSEguide
Trusted by 1 Crore+ Students
Test Generator
Create papers online. It's FREE.
CUET Mock Tests
75,000+ questions to practice only on myCBSEguide app
