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1. It is estimated that the Chernobyl disaster released 6.0 Megacurie of 137Cs (half life 30.2yrs) into the environment.
a) How much activity does Cs have in the year 2021?
b) Calculate the mass of Cs released?
What maximum height attained by the object that is projected vertically upward with a
speed of 60 m/s? How long will it take for the object to reach the maximum height?
3. A ball is batted into the air and the ball found at a point 200 m distance horizontally in
5.0 seconds. Neglecting air resistance. Find the maximum height attain by the ball.
4. A Cannon is fired with a muzzle velocity of 300 m/s, at an angle of 60 degrees. Find the
range, time of flight, maximum height attained by the projectile.
speed of 60 m/s? How long will it take for the object to reach the maximum height?
3. A ball is batted into the air and the ball found at a point 200 m distance horizontally in
5.0 seconds. Neglecting air resistance. Find the maximum height attain by the ball.
4. A Cannon is fired with a muzzle velocity of 300 m/s, at an angle of 60 degrees. Find the
range, time of flight, maximum height attained by the projectile.
Diane dives in a pool moving at 7.6m/s until reaching 8.42m from the diving board. Solve the following
A. The average acceleration of the diver as she travels through the water
B. Time the divers come to a stop
C. The speed of the diver after diving 5.87m
A. The average acceleration of the diver as she travels through the water
B. Time the divers come to a stop
C. The speed of the diver after diving 5.87m
Diane dives in a pool moving at 7.6m/s until reaching 8.42m from the diving board. Solve the following
A. The average acceleration of the diver as she travels through the water
B. Time the divers come to a stop
C. The speed of the diver after diving 5.87m
A. The average acceleration of the diver as she travels through the water
B. Time the divers come to a stop
C. The speed of the diver after diving 5.87m
A rolling ball moves from x1 = 3.4 cm to x2 = - 4.2 cm during the time from t1 = 3.0 s to t2 =
6.1 s. What is its average velocity?
A disoriented physics professor drives 3.25 km north, then 2.20 km west, and then 1.50 km south. Find the magnitude and direction of the resultant displacement using the component method.
A small spherical steel ball of radius
a of a material of density à falls from rest in still air of viscosity à ·. Now (i) Write up
the equation of motion of the ball, (ii) Estimate its terminal velocity, and (iii) Find out
the time and distance traversed when the ball has acquired 90% of the terminal
velocity.
a of a material of density à falls from rest in still air of viscosity à ·. Now (i) Write up
the equation of motion of the ball, (ii) Estimate its terminal velocity, and (iii) Find out
the time and distance traversed when the ball has acquired 90% of the terminal
velocity.
A spacecraft is going from the earth to the moon. Find such a position from the earth over there The gravitational force is zero. Given
Earth mass = 6.0 × 10^24 kg. Moon mass = 74 × 10^22 kg; The distance between the center of the earth and the center of the moon = 3.8 x 10^8m
Earth mass = 6.0 × 10^24 kg. Moon mass = 74 × 10^22 kg; The distance between the center of the earth and the center of the moon = 3.8 x 10^8m
how long does it take for a swimmer with an average rate of 0.5m/s2 to cross a 1.2-mile wide strait?
A damped harmonic oscillator is subjected to a sinusoidal driving frequency whose
frequency is altered but amplitude kept constant. It is found that the amplitude of the
oscillator increases from 0.02 mm at very low driving frequency to 8.00 mm at a
frequency of 100 cps. Obtain the value of (i) quality factor (ii) the relaxation time,
(iii) the damping factor.
frequency is altered but amplitude kept constant. It is found that the amplitude of the
oscillator increases from 0.02 mm at very low driving frequency to 8.00 mm at a
frequency of 100 cps. Obtain the value of (i) quality factor (ii) the relaxation time,
(iii) the damping factor.
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#340153 on Dec 2023
#340153 on Dec 2023