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Questions asked by meena.p
Questions
14353
questions
1
answer selected
Select the incorrect statement from the following options.
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 2, 2018
1
answer
The molar heat of vaporisation $(\Delta \;H_{vap})$ for water is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 2, 2018
1
answer
The vertex of the polynomial $y = 2x^2-4x-6$ is
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
The y intercept of the equation $y=3x^2-4x+12$ is
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
The roots of the equation $3x^2+7x+2$ are
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
Simplify for the rational expression : $\large \frac{9x^2-1}{(3x+1)(3x-1)}$
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
Let $f(x)=x^2-4x+2$ and $g(x)=6-x$. What is $f(g(x))$
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
Lucy throws a rock off a 10 m ledge at a speed of $3\;m/s$ . Calculate when the rock hits the ground .
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
Two consecutive positive odd numbers have a product of 35. what is the sum of the two number ?
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
Emily punts a football into the air. The equation $h=-16t^2+60t$ represents the height of the ball in feet, t seconds after it was punted . If Brandon punts a ball higher than Emily did, which of the following equation could be used to find the height of Brandon's punt ?
sat
math
quadratic-equations
asked
Aug 2, 2018
1
answer
$y=3x , 3x^2+3y^2=240$. If $(x,y)$ is a solution to the system of equation above, what is the value of $x^2$ ?
sat
math
quadratic-equations
asked
Aug 1, 2018
1
answer
Which of the following has the same equation as $x^2-8x-14$
sat
math
quadratic-equations
asked
Aug 1, 2018
1
answer
A 1.50 gram sample of urea is dissolved in 105.0 gram of water and produces a solution that boils at $100.12^{\circ}C$ . From these data , what is the molecular mass of urea?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
How many grams of $NaOH$ are dissolved in 200. milliliters of solution if its concentration is $1.50\;M$
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
How many grams of NaCl are needed to prepare 200 gram of a 10 % salt solution ?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
How much heat is needed to change 100.0 gram of ice at $273\;K$ to steam at $373\;K$?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
The normal boiling point of a liquid is the temperature at which it boils when the external pressure is
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
The boiling point of a liquid is the temperature at which the vapour pressure
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
On increasing the temperature of a liquid, its vapour pressure
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
The viscous force the relative motion between the adjacent layers of a fluid in motion. Which one of the flowing fits best in the sentence?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
Water flows between two plates of which the upper one is stationary and the lower one is moving with a velocity V. What will be the velocity of the fluid in contact with the upper plate?
sat
chemistry
liquids-solids-and-phase-change
asked
Aug 1, 2018
1
answer
Hydrogen diffuses six times faster than gas A The molar mass of gas A is
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
In the equation of state of an ideal gas PV = n RT, the value of the universal gas constant would depend only on
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
In order to increase the volume of a gas by 10%, the pressure of the gas should be
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
If a gas expands at constant temperature, it indicates that:
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
How large a balloon could you fill with $4\;g$ of He gas at $22^{\circ}C$ and 720 mm of Hg?
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
A gas occupies one litre under atmospheric pressure. What will be the volume of the same amount of gas under 750 mm of Hg at the same temperature?
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
Which sample demonstrates particles arranged in a regular geometric pattern?
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
The amount of energy needed to change a substance from a solid phase to a liquid phase is __________ .
sat
chemistry
liquids-solids-and-phase-change
asked
Jul 31, 2018
1
answer
If $x=2$ and $x=3$ are the roots of the equation $3x^2-2px+2q=0$, then the value of $p$ and $q$ are ______
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
The roots of the equation $x^2-6x+7=0$ are $\alpha$ and $\beta$. The value of $\large\frac{1}{\alpha}+\frac{1}{\beta}$ is
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
For what value of $m$ does the equation $x^2+4x+m=0$ have equal roots ?
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
The equation $(3x+1)^2=-2x$ has
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
The solution of the expression is <br>$\qquad \qquad \qquad \large\frac{x+3}{1-x}=\frac{-9}{x}$
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
A picture is to be pasted inside a frame. The frame will be cut out of a piece of steel, so as to keep the weight minimum. The final area should be $28\;cm^2$. The inside of the frame where the picture has to be pasted has to be 11 cm by 6 cm. What should be the width of the metal ?
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
The possible solutions for the equations are : <br>$\qquad \qquad \qquad 6x^2+5x-6=0$
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
The simplified form of $\large\frac{4(2x^2+7x+3)}{(8x+4)}$ is
sat
math
quadratic-equations
asked
Jul 31, 2018
1
answer
How many real solutions are there for the equation $x^4+3x^2-10=0$
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
A rectangle has a perimeter $80m$ and an area of $400m^2$. What is the sum of the length and the width ?
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
$2x^2-6x+3$ has
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
Two consecutive positive multiples of three have a product of 54. What is the sum of the two numbers ?
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
Which value of $x$ will make the fraction undefined ?<br> $\qquad \qquad \qquad \large\frac{x^2}{9x^2-1}$
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
The square of a number is equal to two less than three times the number. What the two possible values of the number ?
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
If $3t^2+4t+1=0$, what can be the value for $5t+3$ ?
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
Reduce : $\large\frac{x^2-9x+20}{x^2-x-12}$
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
The solution for the quadratic equation $3n^2-2n=-1+2n^2$ is
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
Simplify : $\large\frac{21t+5+4t^2}{5t+25}$
sat
math
quadratic-equations
asked
Jul 30, 2018
1
answer
An ion $Mn^{a+}$ has the magnetic moment equal to 4.9bm. What is the value of a ?
sat
chemistry
atomic-structure
asked
Jul 30, 2018
1
answer
The energy of second Bohr orbit of hydrogen atom is $-328\;kJ mol^{-1}$ , hence energy of fourth Bohr orbit would be
sat
chemistry
atomic-structure
asked
Jul 30, 2018
1
answer
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