1
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
Three containers C1, C2 and C3 have water at
different temperatures. The table below shows
the final temperature T when different amounts
of water (given in litres) are taken from each
containers and mixed (assume no loss of heat
during the process)
The value of $$\theta $$ (in °C to the nearest integer) is ..........
![JEE Main 2020 (Online) 8th January Evening Slot Physics - Heat and Thermodynamics Question 259 English](https://imagex.cdn.examgoal.net/7k9k2k5hhzgna/7354923f-638e-45c4-ab36-7152f0772a3f/91a06a60-38ca-11ea-92dd-4b9c3519996f/file-7k9k2k5hhzgnb-323w.jpg)
Your input ____
2
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
A ball is dropped from the top of a 100 m high
tower on a planet. In the last $${1 \over 2}s$$ before hitting
the ground, it covers a distance of 19 m.
Acceleration due to gravity (in ms–2) near the
surface on that planet is _____.
Your input ____
3
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
The first member of the Balmer series of
hydrogen atom has a wavelength of 6561 Å.
The wavelength of the second member of the
Balmer series (in nm) is:
Your input ____
4
JEE Main 2020 (Online) 8th January Evening Slot
Numerical
+4
-0
An asteroid is moving directly towards the
centre of the earth. When at a distance of
10R (R is the radius of the earth) from the earths
centre, it has a speed of 12 km/s. Neglecting
the effect of earths atmosphere, what will be the
speed of the asteroid when it hits the surface
of the earth (escape velocity from the earth is
11.2 km/s) ? Give your answer to the nearest
integer in kilometer/s _____.
Your input ____
Paper analysis
Total Questions
Chemistry
19
Mathematics
17
Physics
24
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