hello study buddies
please answer the following questions in mathematics .
1) Write two pairs of integers (a, b) such that a / b = -4.
One such pair is (8, -2) because 8/ -2 = (-4).
2) Which is greater 3/5 or 5/3
3) Find : a) 5.4 X 2.7
b) 25.756 ÷ 1000
4) Find the Sum of (7/ 11) + (-9/11).
5) Draw nets for a) Cylinder b) Cuboid
6) A certain freezing process requires that room temperature be
lowered from 450C at the rate of 60C every hour. What will be the
room temperature 9 hours after the process begins.
7) Arrange 2/9, 2/3, 8/21 in descending order
8) Find the value of (-3 /13) ÷ (-4 /72)
9) Given two triangles measurements are in ABC, angle B = 900,
AC = 8 cm, AB = 3 cm and in triangle PQR, angle P = 900, PR = 8
cm, QR = 8 cm. Show that these two triangles are congruent.
10) Define the terms a) Faces b) Edges c) Vertices and draw
anyone 3D figure and find its Faces, Vertices and Edges.
11) Ram plants 5 saplings, in a row, in his garden. The distance
between two adjacent saplings is 7/5m. Find the distance between the
first and the last sapling.
12) Define the term congruent. Draw two congruent shapes and prove
they are congruent
Answers
Answer:
According to Charles’s lawA gas at 298 K is shifted from a vessel of 250 cm3250 cm3 capacity to that of 1L capacity. The pressure of the gas willOne atmosphere is numerically equal to approximatelyWhich of the following relations for expressing volume of a sample is not correct1°C1°C rise in temperature is equal to a rise ofIf the refracting angle of a prism is 60°60° and minimum deviation30°30° , the angle of incidence will beDispersion is the term used to describe :A beam of white light is incident on a hollow glass prism. Then the light emerging from the prism gives from 0° and 90°
beamThe critical angle for water is 48.2°48.2° . Then its refractive index isWhen a light ray suffers reflection, at the interface between air and glass, the change of phase in the reflected wave is equal toWhen a light wave travels from denser to rarer medium, its
P) velocity decreases R) wavelength increases Q) frequency remains unchanged
Duration of day time is greater than night time due toIf n(μ)=100, n(A)=50, n(B)=20 and n(A∩B)=10 then n[(A∪B)c]=