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Q1. A planet of mass 6.00 1025 kg is in a circular orbit of radius 2.00 1011 m around a star. The star exerts a force on the planet of constant magnitude 5.03 1023 N. The speed of the planet is 4.09 104 m/s. All through this half "year", how much work is done on the planet through the gravitational force acting on planet?
Q2. A car accelerates uniformly from rest and reaches a speed of 16 m/s in 10.00 s. If the diameter of a tire is 57.0 cm, find (a) number of revolutions the tire makes throughout this motion, assuming that no slipping occurs. (b) What is the final rotational speed of a tire in revolutions per second?
A 10-cm-diameter cylinder of helium gas is 20 cm long and at 20°C. The pressure gauge reads 120 psi. how many helium atoms are in the cylinder? what is the mass of the helium?
A thin, circular disc is made of lead and has a radius of 0.0350 cm at 20.0 °C. find out the change in the area of the circle if the temperature is increased to 625.0 °C. The coefficient of linear thermal expansion for lead is 29.0 x 10-6/C°.
A typical helium nucleus consists of two protons and two neutrons. What is the electric force between the nucleus and one of the electrons orbiting the nucleus
Two narrow slits 54?m apart are illuminated with light of wavelength 510nm, What is the angle of the m=2 bright fringe in radians
Two particles of masses m and 3.00m are moving toward each other along the x-axis with the same speed v. They undergo a head on elastic collision and rebound along the x- axis. Find out the final speed of the heavier object.
What is the (a) magnitude and (b) angle (measured relative to the positive direction of the x axis) of the asteroid's acceleration.
In one frame of reference(say H), two events occur at the same point in space, but are separated by a time interval of 100 nanoseconds
Find out the time that the arrow spends in the air.
When Philippe Petit was in the middle of the wire between the World Trade Center Towers the wire depressed 1 ft. If during his 40 minutes of tricks the wire began to oscillate up and down from this equilibrium position by 6 inches, where is his ki..
Three equal point charges, each with charge 1.15 , are placed at the vertices of an equilateral triangle whose sides are of length 0.600 . What is an electric potential energy of the system? (Take as zero the potential energy of the three charges ..
An 85 kg man lowers himself to the ground from a height of 5.6 m by holding onto a rope that runs over a frictionless pulley to a 75 kg sandbag
what is the potential difference between the plates. A particular freely falling object requires 1.85 s to travel the last 31.0 m before it hits the ground. From what height above the ground did it fall.
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