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the ball is tied on a string to whirl it having a radius of 50 cm at a velocity of 1.2 m per squared what will be the acceleration of the ball
The total masses of BlueCart and RedCart (including its mass) are 240g and 350g respectively. The velocities of BlueCart and RedCart before collision are +0.543 m/s and -0.441 m/s respectively while the velocities after collision are -0.559 m/s and +0.321 m/s. What is the total momentum before collision?
Two forces are acting on a body. One acts east, the other at 35° northeast. If the two forces are equal in magnitude of 50 N, find the resultant.
A 0.90 kg squid initially at rest ejects 0.30 kg
water vertically downwards with speed ,v = 20.0
m/s from siphons which are some parts of its body
to swim upwards. By using conservation of
momentum, find the speed of the squid after
ejecting the water. Ignore any resistance occured.
The density and atomic no. of niobium are 8.57 x 10 kg/m³ and 93, respectively. It has one conduction electron per atom. Calculate the London penetration depth of niobium.
In Aluminium, v= 6320 m/s and v, 3100 m/s. The density of aluminium is 2.7x10 kg/m3 and its atomic weight is 26.97 amu (i)Calculate the Debye cut off frequency for aluminium. (ii) The Debye temperature for aluminium, as obtained from specific heat measurement, is 375 K. Find the cut off frequency and compare it with the result obtained in (a).
Estimate the Debye temperature of gold if its atomic weight is 197, the density is 1.9 x 104 kg/m3 and the velocity of sound in it is 2100 m/s.
A given superconductor has a critical field of 2.3 x 10 5 and 6.8 x 10 5 A/m at 10 K and 8 K, respectively. Calculate its transition temperature and critical field for 4.2 K.
In numbers 1-3, find the length of A x B 1. A = 2i - 2j - k, B = i - k 2. A = 2i + 3j, B = -i + j 3. A = 2i - 2j + 4k, B = -i + j -2k In numbers 4-5, find a. A • B, |A|, |B| 4. A = 2i - 4j + √5k, B = -2i + 4j - √5k 5. A = (3/5)i + (4/5)k, B = 5i + 12j
In fluorescence, an atom absorbs a photon with a wavelength of 311 nm. This energy radiates out of the atom in two stages. The wavelength of the second emitted photon is 694 nm. What is the wavelength of the second emitted photon?
