NTA JEE Main 3rd September 2020 Shift 1

A cricket ball of mass 0.15 kg is thrown vertically up by a bowling machine so that it rises to a maximum height of 20 m after leaving the machine. If the part pushing the ball applies a constant force $$F$$ on the ball and moves horizontally a distance of 0.2 m while launching the ball, the value of $$F$$ (in N) is $$(g = 10$$ m s$$^{-2})$$

A person of 80 kg mass is standing on the rim of a circular platform of mass 200 kg rotating about its axis at 5 revolutions per minute (rpm). The person now starts moving towards the centre of the platform. What will be the rotational speed (in rpm) of the platform when the person reaches its centre....

When a long glass capillary tube of radius 0.015 cm is dipped in a liquid, the liquid rises to a height of 15 cm within it. If the contact angle between the liquid and glass is close to 0°, the surface tension of the liquid, in milliNewton m$$^{-1}$$, is $$\left[\rho_{\text{(liquid)}} = 900 \text{ kg m}^{-3},\; g = 10 \text{ m s}^{-2}\right]$$ (Given answer in closed integer)

A bakelite beaker has volume capacity of 500 cc at 30°C. When it is partially filled with $$V_m$$ volume (at 30°C) of mercury, it is found that the unfilled volume of the beaker remains constant as temperature is varied. If $$\gamma_{beaker} = 6 \times 10^{-6}$$ °C$$^{-1}$$, where $$\gamma$$ is the coefficient of volume expansion, then $$V_m$$ (in cc) is close to...

An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is at a height of 45 cm. When the jar is filled with a liquid up to a height of 30 cm the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid is $$\frac{N}{100}$$, where N is an integer, the value of N i

The atomic number of the element unnilennium is:

If the boiling point of $$H_2O$$ is 373 K, and the boiling point of $$H_2S$$ will be:

Of the species, NO, NO$$^+$$, NO$$^{2+}$$ and NO$$^-$$, the one with minimum bond strength is:

An acidic buffer is obtained on mixing:

Which one of the following compounds possesses the most acidic hydrogen?