All questions of May Week 1 for Class 10 Exam

*Henry Ford was a well-known pioneer of mass production.

In Second World War , there are two groups named as "Axis Powers" and "Allied Powers" . Allied Powers includes USA , France , Austria, Great Britain and Soviet Union. While Axis Powers includes Germany, Italy and Japan. Hence option A is correct as these three countries collective known as "Axis Powers".

Explanation:

Given pair of linear equations are:

3x - 7y = k ...(1)

12x - 2ky = 4k - 1 ...(2)

We need to find the value of k for which these equations do not have any solution.

Method:

If a pair of linear equations do not have any solution, it means they are inconsistent. Two linear equations are inconsistent if their slopes are equal but their y-intercepts are not equal.

We can rearrange the given equations into slope-intercept form y = mx + b, where m is the slope and b is the y-intercept.

Equation (1) can be rearranged as:

y = (3/7)x - (k/7) ...(3)

Equation (2) can be rearranged as:

y = (6/k)x - (2k-1)/(2k) ...(4)

Comparing equations (3) and (4), we get:

m1 = 3/7 and m2 = 6/k

For the pair of equations to be inconsistent, m1 = m2 and b1 ≠ b2.

Equating the slopes, we get:

3/7 = 6/k

Solving for k, we get:

k = 14

Now, substituting k = 14 in equations (1) and (2), we get:

3x - 7y = 14 ...(5)

12x - 28y = 55 ...(6)

Multiplying equation (5) by 4, we get:

12x - 28y = 56 ...(7)

Comparing equations (6) and (7), we see that the y-intercepts are not equal. Hence, the given pair of equations are consistent for k = 14.

Conclusion:

Thus, the given pair of linear equations 3x - 7y = k, 12x - 2ky = 4k - 1 do not have any solution if k = 14. Therefore, the correct option is (B).

Rinderpest arrived in Africa in the late 1880s. Within two years, it spread in the whole continent reaching Cape Town within five years. Rinderpest had a terrifying impact on people’s livelihoods and the local economy. It killed about 90 percent of the cattle. Planters, mine owners and colonial governments became successful to strengthen their power and to force Africans into the labour market.

Importance of Caribbean Islands for Indentured Migrants

Indentured migration was a system of labor migration that emerged in the 19th century to address labor shortages in various parts of the world. It involved the recruitment and transportation of workers from one country or region to another under a contractual agreement that bound them to work for a specific period in exchange for passage, food, clothing, and shelter. The Caribbean Islands were an important destination for indentured migrants, and here's why:

1. Historical Context

The Caribbean Islands were colonized by Europeans, primarily the British, French, and Spanish, who established sugar plantations that required a massive workforce. The indigenous population was decimated by diseases, and African slaves were brought in to work on the plantations. However, the abolition of slavery in the 19th century created a labor shortage, and the plantation owners turned to indentured labor to fill the gap.

2. Recruitment and Transportation

Indentured labor was recruited from various parts of the world, including India, China, and Africa. The recruitment process involved agents who traveled to different regions to sign up workers for the journey to the Caribbean Islands. The workers were promised a better life and higher wages than they could earn at home. They signed a contract that bound them to work for a specific period, usually five years, in exchange for passage, food, clothing, and shelter.

3. Living and Working Conditions

The living and working conditions of indentured laborers in the Caribbean Islands were harsh. They were housed in barracks and subjected to long hours of work in the sugar fields. The work was grueling, and the climate was hot and humid. Many workers died from disease, malnutrition, and overwork.

4. Legacy of Indentured Migration

Indentured migration to the Caribbean Islands lasted from the mid-19th century to the early 20th century. It brought millions of workers to the region, who contributed to the development of the sugar industry and the economy. However, it also created a legacy of exploitation, inequality, and discrimination that persists to this day.

Conclusion

In conclusion, the Caribbean Islands were an important destination for indentured migrants because of the labor shortages created by the abolition of slavery. The system of indentured migration brought millions of workers to the region, who contributed to the development of the sugar industry and the economy. However, it also created a legacy of exploitation and discrimination that continues to affect the region.

What Does the "p" in pH Stand For?
The "p" in pH stands for "power." This designation is derived from the German word "Potenz," which translates to "power" or "potential."
Understanding pH Scale
The pH scale is a logarithmic scale used to measure the acidity or basicity of a solution. It ranges from 0 to 14, where:
- A pH of 7 is considered neutral (pure water).
- A pH less than 7 indicates acidity (higher hydrogen ion concentration).
- A pH greater than 7 indicates basicity (lower hydrogen ion concentration).
Measurement of Hydrogen Ion Concentration
The pH scale specifically measures the concentration of hydrogen ions (H+) in a solution. This is crucial because:
- Acidic Solutions: Higher concentrations of H+ ions lead to lower pH values. For example, lemon juice has a pH of around 2, indicating high acidity.
- Basic Solutions: Lower concentrations of H+ ions correspond to higher pH values. For instance, bleach has a pH of around 12, indicating it is basic.
Importance of pH
Understanding pH is essential in various fields, including:
- Chemistry: It helps in determining the nature of chemical reactions.
- Biology: Enzyme activity and metabolic processes are pH-dependent.
- Environmental Science: pH affects aquatic life and soil health.
In summary, the correct answer is option 'B' because the pH scale effectively measures the hydrogen ion concentration in a solution, which determines its acidity or basicity.

I'm sorry, it seems like the question is incomplete. Can you please provide the full question?

Goods are transported in refrigerated ships that are fully equipped with a system to circulate air properly. You can also ship in refrigerated containers.

It is not clear what the expression is asking. Please provide more information or clarify the expression.

El Dorado, the fabled city of gold that the Spanish believed was located somewhere in South America.

B

2( x - 1 ) / 5 is less than 3 ( 2 + x ) / 7
2x - 2 / 5 is less than 6 + 3x / 7

Cross multiplication
14x - 14 is less than 30 + 15x
14 x - 15 x is less than 30 + 14
- x is less than 44
When we divide from negative no. to positive no. then inequality sign becomes change
So,
x is greater than - 44
On number line , it is ( - 44 , + infinity )
Hence, option (C) is correct .

I think the question is to solve for x, x/5 < (3x - 2)/4 - (5x - 3)/5