AP EAPCET 2022 - 5th July Morning Shift | Units & Measurement and Dimensions Question 7 | Physics

The energy of $$E$$ of a system is function of time $$t$$ and is given by $$E(t)=\alpha t-\beta t^3$$, where $$\alpha$$ and $$\beta$$ are constants. The dimensions of $$\alpha$$ and $$\beta$$ are

$$\left[M L^2 T^{-1}\right]$$ and $$\left[M L^2 T\right]$$

$$\left[\mathrm{LT}^{-1}\right]$$ and $$\mathrm{[L T]}$$

$$\left[\mathrm{ML}^2 \mathrm{~T}^{-3}\right]$$ and $$\left[\mathrm{ML}^2 \mathrm{~T}^{-5}\right]$$

$$\left[\mathrm{MLT}^{-1}\right]$$ and $$\mathrm{[M L T]}$$

AP EAPCET 2022 - 4th July Evening Shift

MCQ (Single Correct Answer)

-0

In SI units, $$\mathrm{kg}-\mathrm{m}^2 \mathrm{~s}^{-2}$$ is equivalent to which of the following?

Newton

Watt

Joule

Pascal

AP EAPCET 2022 - 4th July Morning Shift

MCQ (Single Correct Answer)

-0

If $$N_A, N_B$$ and $$N_C$$ are the number of significant figures in $$A=0.001204 \mathrm{~m}, B=43120000 \mathrm{~m}$$ and $$C=1.200 \mathrm{~m}$$ respectively, then

$$N_A=N_B=N_C$$

$$N_A>N_B>N_C$$

$$N_A < N_B< N_C$$

$$N_A> N_B< N_C$$

AP EAPCET 2021 - 19th August Evening Shift

MCQ (Single Correct Answer)

-0

The speed of ripples $$(v)$$ on water surface depends on surface tension $$(\sigma)$$, density $$(\rho)$$ and wavelength $$(\lambda)$$. Then, the square of speed $$(v)$$ is proportional to

$$\frac{\sigma}{\rho \lambda}$$

$$\frac{\rho}{\sigma \lambda}$$

$$\frac{\lambda}{\sigma \rho}$$

$$\sqrt{\frac{\rho \lambda}{\sigma}}$$

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