Explanation

Hydraulic power systems use fluids to transmit power and motion, and the most common fluids used are:

• Water (in hydraulic systems like water supply networks, fire suppression systems, and hydroelectric power plants)
• Oil (in hydraulic systems like heavy machinery, construction equipment, and industrial manufacturing)
• Non-compressible fluids (like hydraulic fluids, brake fluids, and transmission fluids) that are specifically designed for hydraulic systems.

Explanation

Explanation

Geophysics is the science that studies the internal structure and physical properties of the Earth.

It includes the study of earthquakes, magnetic and gravitational fields, and Earth's interior layers.

Explanation

To solve |3x| = 6:

3x = 6 or 3x = -6

x = 2 or x = -2

Explanation

A chord is a line segment with both endpoints on the circle.

Unlike a secant, it does not extend outside the circle.

Explanation

When multiplying matrices A (order m × n) and B (order n × p), the resulting matrix has an order of m × p.

Explanation

50 to 60:

Increase = 60 - 50 = 10

Percent increase = (10 / 50) × 100 = 20%

Explanation

To find the percent decrease:

Original temperature = 88°F

New temperature = 77°F

Decrease = 88 - 77 = 11°F

Percent decrease = (Decrease / Original temperature) × 100

= (11 / 88) × 100

= 12.5%

Explanation

Let's break it down:

Total amount = Rs. 2400

Nida's share = Rs. 600

Remaining amount = Rs. 2400 - Rs. 600 = Rs. 1800

Nadia and Amara share the remaining amount in the ratio 4:5.

Let's divide Rs. 1800 in the ratio 4:5:

Total parts = 4 + 5 = 9

Amara's share = (5/9) × Rs. 1800

= Rs. 1000

Explanation

To find the size of the class interval:

Size = (Greatest value - Lowest value) / Number of intervals

= (21 - 3) / 3

= 18 / 3

= 6