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Task №3
The variable manipulated by the experimenter is called:
a) Dependent variable
b) Correlation coefficient
c) Independent variable
d) Variable control
The dependent variable is:
a) Variable manipulated by the experimenter
b) Variable for which the measurement error is high
c) Variable not manipulated by the experimenter
d) Variable not related to other variables
Show that the difference in pressure between the inside and outside of a spherical liquid drop is 2T/r, where T is the surface tension of the liquid and r is the radius of the spherical liquid drop.
Establish the expression to show how elastic constants are related to each other for an isotropic medium.
Show that Kepler's law obeys the principle of conservation momentum.
A small spherical small ball of radius 'a' of a material of density 'p' falls from rest in still air of viscosity 'n' . now(1) write up the equation of motion of the ball (2) estimate its terminal velocity and (3) find out the time and distance traversed when the ball has acquired 90% of the terminal velocity.
12. Two figure skaters, one weighing 625 N and the other 725 N, push off
against each other on frictionless ice. (a) If the heavier skater travels at
1.50 m/s, how fast will the lighter one travel? (b) How much kinetic
energy is à ¢ createdà ¢ during the skatersà ¢ maneuver, and where does this
energy come from?
against each other on frictionless ice. (a) If the heavier skater travels at
1.50 m/s, how fast will the lighter one travel? (b) How much kinetic
energy is à ¢ createdà ¢ during the skatersà ¢ maneuver, and where does this
energy come from?
11. The expanding gases that leave the muzzle of a rifle also contribute to
the recoil. A 30-caliber bullet has mass 0.00720 kg and a speed of 601
m/s relative to the muzzle when fired from a rifle that has mass 2.80
kg. The loosely held rifle recoils at a speed of 1.85 m/s relative to the
earth. Find the momentum of the propellant gases in a coordinate
system attached to the earth as they leave the muzzle of the rifle
the recoil. A 30-caliber bullet has mass 0.00720 kg and a speed of 601
m/s relative to the muzzle when fired from a rifle that has mass 2.80
kg. The loosely held rifle recoils at a speed of 1.85 m/s relative to the
earth. Find the momentum of the propellant gases in a coordinate
system attached to the earth as they leave the muzzle of the rifle
9. You are standing on a sheet of ice that covers the football stadium
parking lot in Buffalo; there is negligible friction between your feet and
the ice. A friend throws you a 0.400-kg ball that is traveling horizontally
at 10.0 m/s. Your mass is 70.0 kg. a) If you catch the ball, with what
speed do you and move afterwards? b) If the ball hits you and bounces
off your chest, so afterwards it is moving horizontally at 8.0 m/s in the
opposite direction, what is your speed after the collision?
parking lot in Buffalo; there is negligible friction between your feet and
the ice. A friend throws you a 0.400-kg ball that is traveling horizontally
at 10.0 m/s. Your mass is 70.0 kg. a) If you catch the ball, with what
speed do you and move afterwards? b) If the ball hits you and bounces
off your chest, so afterwards it is moving horizontally at 8.0 m/s in the
opposite direction, what is your speed after the collision?
6. A baseball of mass 0.145 kg is moving in the +y-direction with a speed
of 1.30 m/s, and a tennis ball of mass 0.0570 kg is moving in the –
of 1.30 m/s, and a tennis ball of mass 0.0570 kg is moving in the –
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#339914 on Dec 2023
#339914 on Dec 2023