Login
Expert Answers ALL
Subject: Science, asked 12 hours, 42 minutes ago

. Read the passage given below and answer the following questions. (3) After the rejection of Rutherford's model of an atom, Neils Bohr put forward his model of atom which was widely accepted. He put forward certain postulates about the model of the atom which are as follows: • Only certain special orbits, known as discrete orbits of electrons, are allowed inside the atom. • While revolving in discrete orbits, the electrons do not radiate energy. Bohr named these orbits as energy levels. These orbits (or shells) are represented by the letters K, L, M, N,. or the numbers n = 1, 2, 3, 4,.... He also suggested that the maximum number of electrons in a given shell can be calculated as 2n 2 , where ‘n’ represents the orbit number or energy level index, 1,2,3,….
(a) Calculate the maximum number of electrons that can be accommodated in an M shell.
(b) Write the distribution of electrons in a sodium atom.
(c) If K and L shells of an atom are completely filled, calculate the total number of electrons in the atom. 

Subject: Science, asked 12 hours, 45 minutes ago

. A ball of mass 2000 g is dropped from the top of a 200 cm high building. (g = 10 m/s2 ). (Assume potential energy at the ground level to be zero.) (a) What is the kinetic energy of the ball when it reaches the ground? (2) (b) What is the total mechanical energy of the ball when it reaches the ground?

Abc
Subject: Science, asked 12 hours, 47 minutes ago

Read the  passage and answer the questions :-

Vaccines work to prime your immune system against future “attacks” by a particular disease. There are vaccines against both viral and bacterial pathogens, or disease-causing agents. When a pathogen enters your body, your immune system generates antibodies to try to fight it off. Depending on the strength of your immune response and how effectively the antibodies fight off the pathogen, you may or may not get sick.

If you do fall ill, however, some of the antibodies that are created will remain in your body playing watchdog after you’re no longer sick. If you’re exposed to the same pathogen in the future, the antibodies will ”recognize” it and fight it off. Which of the following is not true regarding vaccines?

a.
Vaccines are preparations of antibodies.

b.
Edward Jenner discovered the first vaccine against small pox.

c.
Vaccines strengthen the immune system of the body.

d.
Vaccines are disease specific means of preventing diseases.

Abc
Subject: Science, asked 12 hours, 49 minutes ago

Assertion: The work done by an external unbalanced force during a round trip is not zero.
Reason : No force is required to move a body in its round trip.

a.
Both assertion and reason are true and reason is the correct explanation of assertion.

b.
Both assertion and reason are true but reason is not the correct explanation of assertion.

c.
Assertion is true but reason is false.

d.
Both Assertion and Reason are false

Subject: Science, asked 12 hours, 56 minutes ago

If momentum is doubled what happens to its Kinetic Energy? *

Subject: Science, asked 12 hours, 57 minutes ago

6. If momentum of an object is doubled what happens to its velocity? 

Subject: English, asked 12 hours, 57 minutes ago

What is the significance of the Buddha’s request for a handful of mustard seeds and the addition of a condition to it? ans in 30-40 words .

Subject: Science, asked 12 hours, 58 minutes ago

 If an object of mass 50g is moving with velocity 5m/s. Find its K.E. in S.I. system 

Subject: Science, asked 12 hours, 59 minutes ago

A ball of mass m₁ = 50g is moving with velocity 5m/s and another ball of mass 100g is moving in opposite direction with 8 m/s velocity. If they stick together and moves with common velocity find it ? *

Subject: Science, asked 13 hours ago

 1 kWh is equal to ________J *




4. A ball of mass m
 

Subject: Science, asked 13 hours, 3 minutes ago

. If an object of mass 5kg, is released in gravity from height 10m find how much velocity it will gain ? (2=10) *

Subject: Science, asked 13 hours, 12 minutes ago

A current of 5Amp flows through a resistor when connected to 220V supply. What will be the resistance when connected to a supply of 110 V.?
 

Subject: Maths, asked 13 hours, 18 minutes ago

Please experts answer this question it's very urgent

Subject: Social Science, asked 13 hours, 25 minutes ago

Please help me in this question

Subject: Science, asked 13 hours, 28 minutes ago

Q2.What is the ratio between masses of carbon and oxygen in CO2?

34567
What are you looking for?