Physics Answers

A capillary tube with an inside diameter of 𝟓𝟒𝟎 𝝁𝒎 can support a 𝟏𝟎𝟎 𝒎𝒎 column of liquid that has a density of 𝟏𝟑𝟓𝟎𝟎 𝒌𝒈𝒎−𝟑. If 𝒉 = 𝟎. 𝟏 then is it possible to find the surface tension of the liquid? If not, then write down the reason.

Consider repeated timings of 50 swings of pendulum to be 23.8, 23.5, 23.7, 23.4 seconds. Calculate the standard error in the measurement.

The focal length of a thin lens obtained by repeating measurements is given as follows: 10.1, 10.3, 9.9, 10.0, 9.8cm. what is the average focal length and the mean deviation.

A loaded gun is dropped on a frozen lake. The gun fires, with the bullet going horizontally in one direction and the gun sliding on the ice in the other direction. The bullet's mass is 0.03 kg, and

speed is 290 m/s. If the gun's mass is 2.1 kg, what is its speed (in m/s)?

X

m/s

25mE+10mE+mW

+20m N +26m N+6 m/s

A stone is attached to the end of an inelastic string and whirled in a circular part of radius 30cm, if the stone makes 9 revolution in 3 seconds find its period

A cylindrical container with a cross-sectional area of 70.2cm2 holds a fluid of density 796kg/m3. At the bottom of the container, their pressure is 117kpa. Assume pat=101kpa. what is the depth of the fluid? Find the pressure at the bottom Of the container after an additional 2.35×10^-3m³.

Determine the specific weight, density, and specific gravity of a liquid that occupies a volume of 200litres and weighs 178kg. Will the liquid float on the surface of oil of specific gravity (0.8) provides a result in S:I units

1. A belt of length 25 m runs on a wheel of radius 30 cm. The wheel coasts uniformly to rest from an initial speed of 2 rev s-1. Calculate the 

i)  number of revolutions the wheel turns before it stops.  

ii) angular acceleration of the wheel 

7. An anti aircraft missile is fired vertically upward from the earth’s surface with an initial

velocity of 500 m/s. Calculate:

(a) The maximum height it can reach.

(b) The time taken to reach that height.

(c) The velocity of the missile at t = 60 s.

(d) The time when it reaches the height of 10 km.