Explanation

The gall bladder stores and concentrates bile produced by the liver.

Bile helps in the digestion and absorption of fats in the small intestine.

Explanation

Joule is a unit of work or energy or heat.

Joule is a scalar quantity.

Explanation

Slime molds are multinucleated; they have many nuclei in a shared cytoplasm (called a plasmodium).

This allows them to move and feed efficiently as one large cell.

Explanation

• Vitamin B9 is most commonly known as folic acid 
• The technical chemical name is pteroyl-L-glutamic acid

Last updated by NS on 20-April-2026

Explanation

Polyester is made from Polyethylene Terephthalate (PET), a synthetic polymer.

It is widely used in fabrics, plastic bottles, and packaging materials.

Explanation

To find the value-added tax (VAT), we need to calculate the tax paid and charged, then find the difference.

Step 1: Calculate the tax paid on purchase

Tax paid = 5% of Rs. 52900 = 0.05 * 52900 = Rs. 2645

Step 2: Calculate the tax charged on sale

Tax charged = 7% of Rs. 53500 = 0.07 * 53500 = Rs. 3745

Step 3: Calculate the value-added tax (VAT)

VAT = Tax charged - Tax paid = Rs. 3745 - Rs. 2645 = Rs. 1100

Explanation

Let's break it down step by step:

1. Expand 2x²(1 + 3x):

2x² + 6x³

2. Expand (1 + 4x² - 2x)(5x - 1):

= 5x - 1 + 20x³ - 4x² - 10x² + 2x

= 20x³ - 14x² + 7x - 1

3. Now subtract:

2x² + 6x³ - (20x³ - 14x² + 7x - 1)

= 2x² + 6x³ - 20x³ + 14x² - 7x + 1

= -14x³ + 16x² - 7x + 1

Explanation

Let's denote Umar's current age as x.

Noor's current age = x + 8

After 3 years:

Umar's age = x + 3

Noor's age = x + 8 + 3 = x + 11

According to the problem:

x + 3 = 1/3 * (x + 11)

3(x + 3) = x + 11

3x + 9 = x + 11

2x = 2

x = 1

Explanation

Given:

Area = 42 cm² (assuming the unit is consistent, but it's given as m² which seems incorrect given the base lengths are in cm. Let's proceed with cm² for calculation purposes)

Bases:

a = 5.6 cm

b = 2.9 cm

Formula:

Area = ((a + b) / 2) × height

42 = ((5.6 + 2.9) / 2) × height

42 = (8.5 / 2) × height

42 = 4.25 × height

height = 42 / 4.25

height = 9.88 cm

Explanation

If the tank is 40% filled, then the remaining part, which is empty, is 100% - 40% = 60%.

Therefore, 60% of the tank is empty.