Question
Consider the following statements: Statement (A):
The open system refers to the flow of energy and materials in the environment. Statement (R): In an open system, new energy input is considered as a continuation of the flow system. Which of the following statements is/are correct?Solution
• Statement (A) is correct because an open system involves continuous interaction with the environment, with energy and materials flowing in and out. • Statement (R) correctly explains that in an open system, new energy inputs maintain the system's functioning and flow.
A cylinder 84 cm long is made of steel. Its external and internal diameters are 10 cm and 8 cm respectively. What is the volume of the steel in the cyli...
Lateral surface area of a cube is 420 cm2 less than the lateral surface area of a cylinder. Height of cylinder is 2R cm and radius is R cm. I...
A cuboid has length 8 cm, breadth 6 cm and height 4 cm. Find the length of its space diagonal and its total surface area.
Each side of square ‘A’ is 8 cm less than that of square ‘B’. The perimeter of a rectangle is 6 times the difference of the perimeters of the tw...
- If the edge of the cube is increased by 100%, then find the percentage increase in the volume of the cube.
When the breadth of a rectangle is reduced by 4cm (keeping the length constant), its area reduces by 72 cm2 and when the length is reduced by...
The circumference of a circle is equal to the perimeter of a rectangle whose length and breadth are in ratio 13:10, respectively. If the area of the rec...
A bus passes two bridges of length 500 m and 325 m in 90 seconds and 60 seconds respectively. The length (in m) of the bus is
Find the perimeter of a sector which forms a central angle of 90° in a circle of radius 28 cm.
(Use π = 22/7)An agricultural field is in the form of rectangle having length X1 meters and breadth X2 meters. (X1 and X2 are variables). If X1 + X2 = 40 meters, then...
