Before it widened its research the Armauer Hansen Research institute studied only:
Anonymous Quiz
18%
HIV/AIDS
19%
Tuberculosis
54%
Leprosy
9%
Cervical cancer
The law of conservation of momentum states that______.
Anonymous Quiz
12%
The momentum of any system does not change
17%
The momentum of any closed system does not change
24%
Momentum is neither created nor destroyed
48%
The momentum of any closed system with no net external force does not change
Two objects, A and B, are released from the same height. Object A has twice the mass of object B. Ignoring air resistance, what can you say about the conservation of mechanical energy between the two objects as they fall?
Anonymous Quiz
47%
Mechanical energy is conserved for both objects because their total energies remain constant.
32%
Mechanical energy is not conserved because the objects have different masses.
13%
Mechanical energy is conserved only if both objects fall with the same velocity.
8%
Mechanical energy is conserved only if both objects fall with the same acceleration.
Which of the following is not propertie of magnetic field lines?
Anonymous Quiz
11%
They form closed loops.
23%
The direction of the magnetic field is tangent to the lines.
19%
They never cross each other.
47%
The closer the field lines to each other, the weaker the magnetic force.
❤5
What is(are) the solution(s) set of the absolute equation |3x + 2| - |x - 3| = 5 ?
Anonymous Quiz
24%
{ -5, 0, 3/2}
21%
{3/2}
25%
{0}
30%
{-5, 3/2}
❤1
If two roots of a quadratic equation are -2 and 3, then what is the quadratic equation?
Anonymous Quiz
30%
x² + 5x + 6 = 0
53%
x² - x - 6 = 0
11%
x² - 3x + 4 = 0
6%
x² + 3x - 4 = 0
Which of the following pairs of sets are disjoint?
Anonymous Quiz
45%
A= {1, 3, 2} and B = {5, 6, 7, 8}
24%
C = {a, b, c} and D = { a, b, c, d, e}
21%
E = { 1, {1, 2}} and F = {{2, 1}, 1}
10%
P = { 1, 3, 5, ...} and Q = { 2, 3, 5, 7...}
❤2
If U = {1, 2, 3, ..., 9} and A= { 2, 6, 8}. Then what is A' ?
Anonymous Quiz
17%
{1, 2, 3, 5, 7, 9}
25%
{6, 8}
25%
{1, 3, 5, 7, 9}
33%
{1, 3, 4, 5, 7, 9}
❤6
Suppose A and B are sets such that n(A) = 10, n(B) = 23 and n(A∩B) = 4, then which of the following is equal to n(A∆B)?
Anonymous Quiz
44%
25
19%
9
23%
16
13%
37
🥰5
Of 100 students, 65 are members of mathematics club and 40 are members of a physics club. If 10 are members of neither club, then how many students are members of both clubs?
Anonymous Quiz
9%
100
22%
105
52%
15
17%
50
🥰2
Of 100 staff members of a school, 48 drink coffee, 25 drink both tea and coffee and everyone drinks either coffee or tea. How many stuff members drink tea?
Anonymous Quiz
7%
73
39%
77
37%
52
17%
23
❤6🤔1
What is the molecular geometry of O₃ ?
Anonymous Quiz
30%
Trigonal planar
45%
Bent
19%
Trigonal pyramidal
6%
Tetrahedral
❤4🤔1
What is the molecular shape of BrF₄⁻ ?
Anonymous Quiz
13%
Bent
38%
See saw
39%
Square planar
11%
Octahedral
How many sigma and pi bonds are there in ethylene ( C₂H₄) ?
Anonymous Quiz
39%
5 sigma and 1 pi
35%
4 sigma and 2 pi
18%
5 sigma and 2 pi
8%
6 sigma and 1 pi
🥰4💯2
Change into passive voice:
He helps me every day.
Write your answer under the comment!
He helps me every day.
Write your answer under the comment!
❤1
🤔3👏1
Let A be a 3 × 3 triangular matrix and its diagonal elements are 1, 4, and 2. Then which one of the following is not true about its determinate?
Anonymous Quiz
14%
|A| = 8
23%
2|A| = 16
53%
|5A| = 45
10%
5|A| = 45
If matrix A is a 3 × 3 matrix and its 1st row elements are identical with 3rd row elements. Then matrix A is:
Anonymous Quiz
16%
An identity matrix
25%
Non- singular matrix
33%
Not invertible
26%
Symmetric matrix