Recent questions tagged ch2

Dimensional formula for $\large\frac{L}{RCV}$ is

asked Jun 17, 2013 by meena.p

1 answer

The quantity represented by $\large\frac{\text{mass} \times \text{pressure}}{\text{density}}$ is

asked Jun 17, 2013 by meena.p

1 answer

An athletic coach told his team that muscle times speed is equal to power. What dimension does he view for muscle ?

asked Jun 17, 2013 by meena.p

1 answer

The initial and final temperature of a liquid in a container are observe to be $76.3 \pm0.5 ^{\circ} c$ and $27.7 \pm 0.2 ^{\circ} c$. Find the fall in temperature.

asked Jun 17, 2013 by meena.p

1 answer

Volt is equivalent to

asked Jun 17, 2013 by meena.p

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The value of Kinetic energy $K$ and potential energy $V$ are measured as follows $K=100.0 \pm 2.0\; I \quad V=200.0 \pm 1.0\; I$. What is the percentage error in measurement of mechanical energy ?

asked Jun 17, 2013 by meena.p

1 answer

Find the value of $\large\frac{1.53 \times 0.9995}{1.592}$ with regards for 3 significant figures.

asked Jun 17, 2013 by meena.p

1 answer

If the equation $y=A \cos (Bx-Ct)$ describe the motion of objects ( where $x$ and $y$ are displacements, $t$ is time ), what must be the units of variables $A,B$ and $C$ ?

asked Jun 17, 2013 by meena.p

1 answer

Suppose we are told that the acceleration $A$ of a particle moving with uniform speed $v$ in a circle of radius $r$ is proportional to some power of r, say $r^n$, and some power of v, say $v^m$. Which of the following is the simplest form of an equation for the acceleration?

asked Jun 17, 2013 by meena.p

1 answer

The position $x$ of a particle at time $t$ is given by $x=\large\frac{v_0}{a} $$(1-e^{-at})$ where $v_0$ is constant and $a >0$ find the dimensions of $v_0$ and $a$

asked Jun 17, 2013 by meena.p

1 answer

Two resistances are expressed as $R_1=(4\pm0.5) \Omega$ and $R_2=(12 \pm 0.5) \Omega$. what is the net resistance when they are connected 1) series 2) in parallel, with percentage error ?

asked Jun 17, 2013 by meena.p

1 answer

$\mu$ and $\in _0$ denote the permeability and permitting of free space, the dimensions of $\mu_0\in _0$ are

asked Jun 17, 2013 by meena.p

1 answer

The unit of L / R is (L=inductance and R=resistance)

asked Jun 17, 2013 by meena.p

1 answer

In a certain system, $1$ unit of time is $5\;sec,$ 1 unit of mass is $20 \;kg$ and 1 unit of length is $10 m$. In this system $1$ unit of power corresponds to

asked Jun 16, 2013 by meena.p

1 answer

$E,m,J$ and $ G$ denote energy,mass angular momentum and gravitational constant respectively then the dimension of $\large\frac{EJ^2}{m^5G^2}$ are

asked Jun 16, 2013 by meena.p

1 answer

Identify the pair whose dimensions are equal

asked Jun 16, 2013 by meena.p

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If force, acceleration and time are taken as fundamental qualities, then the dimension of length will be

asked Jun 15, 2013 by meena.p

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If $C$ is capacity and $V$ is the potential across the condenser, what will be the dimensional representation of $\large\frac{1}{2}$$CV^2$

asked Jun 15, 2013 by meena.p

1 answer

The equation of state of some gases can be expressed as $ \bigg(p+\large\frac{a}{v^2}\bigg)$$(v-b)=RT$ Here $p$ is pressure, $v$ is volume , $a,b,R$ are constants. The dimensions of $ 'a'$ are

asked Jun 13, 2013 by meena.p

1 answer

If $2^x+2^{f(x)}=2$, then find the domain of $f(x)$

asked May 30, 2013 by rvidyagovindarajan_1

1 answer

If $f(x) $ is polynomial and $f(x).f(\large\frac{1}{x})$$=f(x)+f(\large\frac{1}{x})$ and $f(3)=28 $ then find $f(4)$

asked May 30, 2013 by rvidyagovindarajan_1

1 answer

If $f(x)=coslogx$ then $f(x^2).f(y^2)-\large\frac{1}{2}$ $(f(\large\frac{x^2}{y^2})$$+f(x^2y^2))= ?$

asked May 29, 2013 by rvidyagovindarajan_1

1 answer

What is range of $f(x)=^{7-x}P_{x-3}$

asked May 28, 2013 by rvidyagovindarajan_1

1 answer

If $f:Z\rightarrow Z $ is defined as $f(x)=x^2+ax+b$ then the values of $a$ and $b$ are ?

asked May 27, 2013 by rvidyagovindarajan_1

1 answer

The Domain of $f(x)=\large^{7-x}P_{x-3}$ is ?

asked May 25, 2013 by rvidyagovindarajan_1

1 answer

Which of the following is not a function in R, the set of real numbers ?

asked May 21, 2013 by rvidyagovindarajan_1

1 answer

If $A=\{1,2,3\}$ and $B=\{2,3,4,9\}$, then which of the following is a function $f:A \;\rightarrow \;B$ ?

asked May 21, 2013 by rvidyagovindarajan_1

1 answer

If $f(x)=\large\frac{4^x}{4^x+2}$ then which among the following is correct ?

asked May 21, 2013 by rvidyagovindarajan_1

1 answer

Which of the given functions is an odd function ?

asked May 18, 2013 by rvidyagovindarajan_1

1 answer

Range of $f(x)=\large\frac{|x|}{x}$ is ?

asked May 17, 2013 by rvidyagovindarajan_1

1 answer

Domain of $y=log(1+x)$ is ?

asked May 17, 2013 by rvidyagovindarajan_1

1 answer

If $f=\{(1,5),(2,6),(3,4)\}$ and $g=\{(4,7),(5,8),(6,9)\}$, then $gof$ = ?

asked May 15, 2013 by rvidyagovindarajan_1

1 answer

If $[2x-3]=5$, what are the values of $x$ where $[.]$ is greatest integer function

asked May 8, 2013 by rvidyagovindarajan_1

1 answer

If $f(x)=log\bigg(\large\frac{1+x}{1-x}\bigg)$, then $f(x)+f(y)$ = ?

asked May 8, 2013 by rvidyagovindarajan_1

1 answer

If $f:R\rightarrow R$ is a function defined as $f(2x+3)+f(2x+7)=2$ $\forall x\in R$ then the period of $f(x)$ is

asked May 7, 2013 by rvidyagovindarajan_1

1 answer

The range of the real valued function $f(x)=\large\frac{x^2+x+2}{x^2+x+1}$ is

asked May 7, 2013 by rvidyagovindarajan_1

1 answer

What is the domain of $f(x)=\large\frac{[x]+1}{[x]-1}$ where $[x]$ is greatest integer function

asked May 1, 2013 by rvidyagovindarajan_1

1 answer

The domain of $sin^{-1}\big[log_3(\large\frac{x}{3})\big]$ is

asked Apr 29, 2013 by rvidyagovindarajan_1

1 answer

If $ S $ is a set having 10 elements in it and $A$ is a relation in $S$ defined as $A=\{(x,y)$, where $ x,y \in\:S\;$ and $\;x\neq\;y.\}$, then no. of elements in $A$ is

asked Apr 29, 2013 by rvidyagovindarajan_1

1 answer

The range of $f (x)=\large\frac{1+x^2}{x^2}$ is

asked Apr 28, 2013 by rvidyagovindarajan_1

1 answer