Explanation

The angular momentum of an electron by Bohr is given by mvr or nh/2π

where v is the velocity,

n is the orbit in which the electron is revolving, m is the mass of the electron,

and r is the radius of the nth orbit

Explanation

= 22 percent *1100 

= (22:100)*1100 

= (22*1100):100 

= 24200:100

= 242

ND-18-8-2023

Explanation

Gooch crucibles made of borosilicate glass with fritted glass bases 

porcelain is used where ashing at high temperatures is required, and those made of borosilicate glass are adequate for drying.

Explanation

Let's break down the given information:

• Total people: 200
• People who like tennis: 90
• People who like cricket: 108
• People who like both: 46

To find the people who like neither, we can use the following formula:

Total people = People who like tennis only + People who like cricket only + People who like both + People who like neither

Let's find the people who like only tennis and only cricket:

• People who like only tennis = Total tennis players - People who like both = 90 - 46 = 44
• People who like only cricket = Total cricket players - People who like both = 108 - 46 = 62

Now, we can plug these values into the formula: 200 = 44 + 62 + 46 + People who like neither

People who like neither = 200 - 44 - 62 - 46 = 48

Therefore, 48 people like neither tennis nor cricket.

So, the answer is 48.

Explanation

Let the number of sweets Roni gives to Tony be x.

After giving x sweets: Roni will have 2 25−x sweets.

Tony will have 55+x sweets.

We want Tony to have four times as many sweets as Roni, so: 55 + x = 4 ( 25 − x )

1. Expand the equation:

   $$55 + x = 100 - 4x$$
   

2. Add $4x$ to both sides to combine the $x$-terms:

   $$55 + 5x = 100$$
   

3. Subtract 5 from both sides:

   $$\mathrm{<font\; color="\#0000ff">5</font>}\mathrm{<font\; color="\#0000ff">x</font>}<font\; color="\#0000ff">=</font>\mathrm{<font\; color="\#0000ff">45</font>}$$5x = 45
   

4. Solve for $x$:

   $$$$x=45/5=9x 
   

Explanation

The temperature in Murree at noon was 16.6°C, and at midnight, it was 20.4°C lower.

To find the temperature at midnight, subtract 20.4°C from the noon temperature:

$$16.6°C - 20.4°C = -3.8°C$$

Explanation

Treaty that created the European Union is Maastrichtt treaty

The Treaties of the European Union are a set of international treaties between the European Union (EU) member states

the Treaty on European Union (originally signed in Maastricht in 1992,

Main changes: establishment of the European Union and introduction of the co-decision procedure, giving Parliament more say in decision-making

SH19-8-2023

Explanation

Pak Prime Minister Mr. Z.A. Bhutto visited Bangladesh from 27-29 June 1974.

Zulfiqar Ali Bhutto was 9th prime minister of Pakistan. 

Pakistan Peoples Party was launched on November 30, 1967 by Zulfiqar Ali Bhutto.

REASON OF THE ZA BHUTTO BANGLADESH VISIT

Bangladesh, June 2E —Prime Minister Zulfikar Ali Bhutto of Pakistan publicly apologized,  for what he called the

“shameful repression and unspeakable crimes”

committed in Bangladesh by the Pakistani Army before the eastern part of Pakistan gained independence in December 1971.

while 

Pak Prime Minister Benazir Bhutto paid a visit to Bangladesh from 1-3 October 1989.

Explanation

We are given:

• 4 boxes with weights: 20 kg, 30 kg, 50 kg, and 70 kg.

We need to determine which total weight cannot be made by combining these boxes.

Let's check the combinations:

1. 20 + 30 + 50 + 70 = 170 kg
2. 20 + 30 + 50 = 100 kg
3. 20 + 30 + 70 = 120 kg
4. 20 + 50 + 70 = 140 kg
5. 30 + 50 + 70 = 150 kg

Now check if 160 kg can be made:

• The possible combinations do not result in 160 kg.

Explanation

1. Pearl Tower is taller than Sky Tower but shorter than Ocean Tower — This gives:
   Ocean Tower > Pearl Tower > Sky Tower.

2. Ocean Tower and MCB Tower are of the same height — So,
   Ocean Tower = MCB Tower.
   Therefore, we have:
   Ocean Tower = MCB Tower > Pearl Tower > Sky Tower.

3. Pearl Tower is shorter than Bahria Tower — This gives:
   Bahria Tower > Ocean Tower = MCB Tower > Pearl Tower > Sky Tower.

Now, we know the following order from tallest to shortest:
Bahria Tower > Ocean Tower = MCB Tower > Pearl Tower > Sky Tower.

The second shortest building is Pearl Tower, as it is just above Sky Tower.