1.
Math
If $x$ varies inversely with $y$, and $x=24$ when $y=4$ then find the value of $x$ when $y=12$
2.
Math
In the opposite figure; the measure of angle $\theta$ equals
3.
Chemistry
if $[H^+] < [OH^-]$ then the solution is
4.
Biology
Two adaptations that have helped all flowering plants succeed are
5.
Math
For what value of (a) will the function $f(x)$ be continuous at $x=4$, $f(x)=\left\{\begin{matrix} \frac{x^2-16}{x-4} &,x\neq 4 \\ a &, x=4 \end{matrix}\right.$ is:
6.
Physics
When connecting two resistors, R1, R2, in series, you can calculate the current using which formula
7.
Biology
The key difference between animal-like protists and animals is that animal-like protists are
8.
Biology
Which of the following energy transformations occurs only in autotrophic organisms?
9.
Biology
Which is considered a general or nonspecific immunity in the body?
11.
Math
If $2+\frac{1}{x}=4$, then the value of $x$ is:
13.
Biology
Substances that make up the CDK cycloenzyme group that control the stages of the cell cycle
14.
Biology
Which of the following statement is true about mutations?
15.
Biology
What four features do all chordates share at some point during development?
16.
Math
The center of the ellipse whose equation $\frac{(x+2)^2}{36}+\frac{(y-5)^2}{9}=1$ ; the point
17.
Physics
A person pushed a box with a mass of 40kg for a distance of 10m with a constant speed on a horizontal surface its kinetic energy coefficient is $\mu = 0.1$, calculate the work of friction in $J$. (assume that the acceleration of gravity $g=10m/s^2$)
18.
Biology
A Protein that makes up the hair, nails, and animals horns
19.
Math
If the probability of the occurrence of event $A$ is 42%, then the probability of non occurring the event $A$ equals:
20.
Math
In the opposite figure: what is the value of x?
21.
Physics
A spring was vibrated 60 times fully in 20s, what is its frequency in Hz?
22.
Physics
A racing car increases its velocity (speed) from 4m/s into 36m/s in a time interval = 4s the acceleration of the car in $m/s^2$ unit equals?
23.
Math
Find the number of sides for a regular polygon, if the measure of its exterior angle equals $30^{\circ}$
24.
Biology
The danger of AIDS is that…
25.
Biology
Rather than exploring an animal's intelligence, scientists interested in mental skill focus on the animal's
26.
Biology
The cancer drug vinblastine interferes with cancer by preventing.
27.
Math
A set of data is distributed naturally with arithmetic mean equals 12 and standard deviation2, then what is the percentage of $p(10\leq x \leq 16)$ ?
28.
Physics
The relation between a concave mirror's center of curvature C and the focal distance F is ....
29.
Chemistry
how many moles does a 66g of $\text{CO}_2$ has? knowing that C=12, O=16, H=1 ....
30.
Physics
A bulb has an illuminance of 2lx, what is it's luminous flux in a distance of 5m?
31.
Biology
Location of sperm maturation and storage:
32.
Physics
When an ultraviolet radiation falls on a negative charged zinc board, it ejects an electron from zinc because...
33.
Biology
Sea stars feed by .........
34.
Math
Find the scalar (inner) product of the two vectors v, u if $v=$❮$-5, 1$❯$\ , \ u=$❮$3, -2$❯?
35.
Chemistry
What are the two last electronic configuration notation in the element silver $\text{Ag}_{47}$?
Knowing that $\text{Kr}_{36}$
36.
Chemistry
Which of the following sublevels is not in an atom?
37.
Chemistry
The vapor pressure effect on 1 mol NaCl is lower than the vapor pressure effect on.....
38.
Biology
Where do light dependent reactions occur during photosynthesis?
39.
Physics
The precision of the measurement of an instrument is ...
40.
Chemistry
Which of the following compounds is an Alkane....
41.
Biology
Fertilization in reptiles ...
42.
Biology
The two main groups of flowering plants based on seed type are
43.
Biology
What is the name of the structure shown in the picture?
44.
Biology
Which of the following is a disaccharide?
45.
Math
If $\triangle JLM \sim \triangle QST$ find the value of $x$?
46.
Physics
A 100n horizontal force is applied on a 20kg body and moved it with the same direction of the force, the gained acceleration of the body in $m/s^2$ is ....
47.
Chemistry
Which of the following does not have a hydrogen bond?
48.
Physics
If the specific heat of zinc is $388j/kg^{\circ}C$ then 97j of heat is enough to ....
49.
Math
What is the common difference of the arithmetic sequence in which its 5th term is 16, and its first term = -8
50.
Math
Find the value of the function $f(x) = 2x^2-8$ at $x=-1$
51.
Math
The component form of the vector V where $|v|=8 \ \ \ , \ \ \ \theta =45^{\circ}$ is:
52.
Biology
Which one of the following is a simple sugar?
53.
Math
Find the equation of the straight line with slope 4 and passes through the point (-3, -6)?
54.
Physics
The energy of a photon is ...
55.
Biology
What is a fruit in biological terms?
56.
Biology
Malaria is caused by the parasitic protist
57.
Chemistry
The name of the compound in the following shape ....
58.
Math
If $\log_x32=5$, then the value of x equals:
59.
Physics
a transformer that its number of turns in primary coil is 200 turns, and 4000turns in secondary coil. if it was supplied with a potential (or effective) difference of 6V calculate the secondary potential difference....
60.
Physics
As the velocity of fluid flow increases, the pressure exerted by that fluid....
61.
Chemistry
The oxidation number of chromium in $K_2CrO_4$ is...
62.
Physics
The heat absorbed or released from an object does not depend on its ...
63.
Math
The disc is divided into 8 equal sectors, what is the probability of spinning an odd number?
64.
Math
Which of the following numbers doesn't belong to the domain of the function $f(x)=\sqrt{4-2x}$
65.
Math
Find the value of b if: $3-2bi=3+8i$
66.
Physics
What is the induced electromotive force produced from the movement of 1m wire at a speed of 4m/s perpendicular to a magnetic field of strength 0.5T?
67.
Math
Find the exact value of $\cos 135^{\circ}$ ?
68.
Biology
The portion of the DNA molecule that can vary is its
69.
Physics
The speed of sound in the air depends on ....
70.
Biology
Algae are similar to plants because they have ..
71.
Math
The positive geometric mean of the two numbers 12, 3 equals:
72.
Biology
During glycolysis the number of ATP molecules used and produced are
74.
Math
How many ways can a person enter a mosque which has five doors and exit from a different door?
75.
Math
What is the derivative of the function $f(x)=\sqrt{7}$
76.
Biology
An organelle that finalizes and packages proteins after they are produced in the ribosomes
77.
Biology
In what era did the dinosaurs become extinct?
78.
Math
In the opposite figure; the value of $x$ equals:
79.
Biology
For the DNA strand 5'-A-C-C-G-T-G-A-C-A-T-T-G-3', the correct compliment DNA would be
80.
Biology
What contributes to the transport of substances across the cell membrane
81.
Biology
What is the role of cyclic proteins in the cell?
82.
Math
in the trapezoid $DEGH: x, y$ are midpoints of its legs, find $DE$?
83.
Biology
It Supports the cell, maintains its shape, and stabilizes the organelles in the cell ....
84.
Chemistry
When the electronegativity difference between the two atoms is zero, then the compound is....
85.
Chemistry
What is the order of the following chemical reaction? $R=k[A]^1 \cdot [B]^2$
86.
Math
If $\triangle ABC$ is isosceles, find the length of side $BC$?
87.
Chemistry
The name of the compound in the following shape ...
88.
Chemistry
What's the result of the acetone reduction?
89.
Physics
Based on the following figure: find the electric potential difference between the two plates.
90.
Math
Determine the type of the Function $f(x)=2x-x^4$?
91.
Math
The parabola whose equation $x^2=8(y-4)$ is opened to:
92.
Physics
The power of an electric motor with work of 30000J during 30s ....
93.
Biology
Compared with the fish living in the conditions shown in the figure, panel A, the fish living in the conditions shown in panel B are likely to experience
94.
Chemistry
Elements in their standard state have a $\Delta H^{\circ}_f$ of ....
95.
Biology
Which of these groups of animals is most likely to be capable of solving complex problems?
96.
Physics
Which of the following is a vector quantity?
97.
Physics
A positive charge of $5\mu C$ is put 30cm from a negative charge of $-4\mu C$, What is the magnitude of the force between them? ($K=9\times 10^9 N.m^2/C^2$)
98.
Chemistry
$2\text{Na(s)}+\text{Cl}_2\rightarrow \text{2NaCl(s)}...$
99.
Chemistry
A neutral solution contains two equal concentrations of hydrogen ions and ....
100.
Math
The image of the point (-1, 3) by reflection on line $y=x$ is:
101.
Math
Find the value: $\lim_{x\rightarrow 4} \frac{x^2-16}{x-4}$ ?
102.
Math
The opposite figure shows number of students successfully passing each subject. the number of students who did not succeed in chemistry equals:
103.
Math
The inverse function of $f(x)=18-3x$ is:
104.
Chemistry
The percent by mass of a solution containing 5g of dissolved solute in 50g of water...
105.
Chemistry
The type of reaction in $\text{C}_2\text{H}_6+\text{Cl}_2\rightarrow C_2H_5Cl$ is ...
106.
Math
Find the value of the integration $\int_{1}^{4} 2x \ dx$?
107.
Chemistry
What's the type of reacting shown?
$\text{CH}_3-\text{CH}_3\rightarrow \text{CH}_2=\text{CH}_2$
108.
Chemistry
Which of the following increases in size when transformed form liquid to solid?
110.
Chemistry
Which of the following is an oxidation reaction?
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