CBSE > Class 08 > Science | CBSE Board | Homework Help

CPCB has recently put online a new draft protocol for ambient-level noise monitoring and is waiting for feedback from experts. “A comprehensive noise pollution monitoring system is being developed and in all probability it should be ready within next three-four months. The standards will cover all noise sources—loudspeakers, vehicles (horns), or others. We are also looking at ways to control noise pollution in metro cities across India,” an environment ministry official said on condition of anonymity. The new standards will also focus on noise at different locations (industrial or residential) at different times (day or night) and suggest control measures.

1Thank You

ANSWER

Explain the nature of the covalent bond using the bond formationin CH3CL?

Posted by Krishnpal Singh 8 years, 2 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Explain the nature of covalent bond using the bond formation in CH3CL?

Posted by Krishnpal Singh 8 years, 2 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Maths

Posted by Vicky Kumar 8 years, 2 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

Write the causes of goiter

Posted by Swathi Krishna Kumar 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 2 months ago

Iodine deficiency: Seafood Deficiency of iodine - found in seafood - is a major cause of goiter. Dietary iodine is found in: seafood plant food grown in iodine-rich soil cow's milk.The thyroid gland needs iodine to manufacture thyroid hormones, which regulate the body's rate of metabolism.
Autoimmune disease :The main cause of goiter in developed countries is autoimmune disease. Women over the age of 40 are at greater risk of goiter, as are people with a family history of the condition. Hypothyroidism is the result of an underactive thyroid gland, and this causes goiter. Because the gland produces too little thyroid hormone, it is stimulated to produce more, leading to the swelling. This usually results from Hashimoto's thyroiditis, a condition in which the body's immune system attacks its own tissue and causes inflammation within the thyroid gland.
Hyperthyroidism: Hyperthyroidism - an overactive thyroid gland ,is another cause of goiter too much thyroid hormone is produced. This usually happens as a result of Graves' disease, an autoimmune disorder where the body's immunity turns on itself and attacks the thyroid gland, causing it to swell.
nodules - benign lumps
smoking - thiocyanate in tobacco smoke interferes with iodine absorption
hormonal changes - pregnancy, puberty, and menopause can affect thyroid function
thyroiditis - inflammation caused by infection, for example
lithium - a psychiatric drug that can interfere with thyroid function
overconsumption of iodine - too much iodine can cause a goiter
radiation therapy - particularly to the neck

1Thank You

ANSWER

Write the causes of diabetes

Posted by Swathi Krishna Kumar 8 years, 2 months ago

CBSE > Class 08 > Science

0 answers

ANSWER

What is a ignition temperature

Posted by Kanchan Shrivastava 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Muskan Saini 8 years, 2 months ago

The lowest temperature at which a substance catches fire is known as ignition temperature.

1Thank You

ANSWER

How earthquake occurs

Posted by Ansh Uppal 8 years, 2 months ago

CBSE > Class 08 > Science

2 answers

Pranavi Krishna 8 years, 2 months ago

Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two plates are rubbing against each other, they stick a little. ... When the rocks break, the earthquake occurs.

1Thank You

Pankhudi Sarda 8 years, 2 months ago

After shaking of earth..

0Thank You

ANSWER

Fyfh

Posted by S Senthil 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Pankhudi Sarda 8 years, 2 months ago

Potato

0Thank You

ANSWER

What is force of friction ?

Posted by Saima Zia 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 2 months ago

Frictional force :It is the opposing force that is created between two surfaces that try to move in the same direction or that try to move in opposite directions. The main purpose of a frictional force is to create resistance to the motion of one surface over the other surface.

1Thank You

ANSWER

What is adolescent

Posted by Mahek Mandhan 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 2 months ago

Adolescence refers to the period of human growth that occurs between childhood and adulthood. Adolescence begins at around age 10 and ends around age 21. Adolescence can be broken into three stages: early adolescence, middle adolescence, and late adolescence.

Adolescence, transitional phase of growth and development between childhood and adulthood. The World Health Organization (WHO) defines an adolescent as any person between ages 10 and 19. This age range falls within WHO’s definition of young people, which refers to individuals between ages 10 and 24.

1Thank You

ANSWER

What is oscillatory motion

Posted by Sanskriti Jain 8 years, 2 months ago

CBSE > Class 08 > Science

1 answers

Amar Kumar 8 years, 2 months ago

Oscillatory motion:If a body moves back and forth repeatedly about a mean position, it is said to possess oscillatory motion.

Vibrations of guitar strings, motion of a pendulum bob, vibrations of a tuning fork, and oscillations of mass suspended from a spring, vibrations of diaphragm in telephones and speaker system and freely suspended springs are few examples of oscillatory motion.

Vibrations of bodies, the path of vibration is always directed towards the mean or equilibrium position.

0Thank You

ANSWER

What is adence

Posted by Aman Kumar 8 years, 2 months ago

CBSE > Class 08 > Science