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ACTIVITY 1.1. WRITE THE NUCLEAR REACTION INVOLVED IN THE SYNTHESIS OF EACH OF THE FOLLOWING NEW ELEMENTS.
A.Curium(Z=96) was formed by reacting Pu-239 with alpha particles ⁴²He,it has a half -life of 162 days.
B.Mendelevium(Z=101) was formed by reacting En-253 with alpha particles.
C.Meitnerium(Z=109) was formed by cold fusion which involves the combination on Bi and Fe nuclides at ordinary temperature.
Find Pluto's
a) minimum distance from the sun
b) maximum distance from the sun
Note:
G= 6.67x10-11 Nm2/kg2
Conversion:
If 5m3 of a certain oil weighs 4000 kg(f). Calculate the specific weight, mass density and specific gravity of this oil.
Polarizer and analyzer are set with their polarizing directions parallel so that the intensity of transmitted light is maximum. Through what angle should either be turned so that the intensity is reduced to 80 % of the maximum intensity?
A father pushes his young daughter on a sled up a 15o inclined-plane which is moving at a
constant velocity. If the push of the father is directed horizontally with a magnitude of
92.0 N, (a) how much work is done by the applied force of the father on the sled with the girl
up to a height of 3.25 m from the base of the inclined plane? (b) What is the work done by
the weight on the sled with the girl if its total mass is 35.0 kg?
A 1200 kg station wagon is moving along a straight highway at 120 m/s. Another car, with
mass 1800 kg and speed 20 m/s, has its centre of mass 40 m ahead of the centre of mass of
the station wagon. Find the position of the centre of mass of the system consisting of the
two automobiles. Find the magnitude of the total momentum of the system. Find the speed
of the system using the speed of the centre of mass.
A ball is thrown forward horizontally from the top of a cliff with a velocity 10ms-1. The
height of the cliff above the ground is 45m. Calculate (i) the time to reach the ground (ii)
the distance from the cliff of the ball on hitting the ground (iii) the velocity with which
the ball hits the ground. (iv) the direction of the ball to the horizontal just before it hits
the ground
Determination of unknown resistance by potentialmeter experiment
How much Work will be done if 420 J of Heat has been added to the Isothermal Process.
A +40uC charged is placed at the origin. Calculate the magnitude and direction of the field created by the point charged at the following A point (5m,0) B. (3m,4m)
