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Question1
The company of an unseen planet orbiting a distant start can be inferred from motion of the star as we see it. As the star and planet orbit the center of mass of the star-planet system, the star moves toward and away from us with what is known as the line of sight velocity, a motion that can be detected. Graph of the line of sight velocity versus time for the star 14 Herculis. The star's mass is believed to be 0.90 of mass of our sun. Assume that only one planet orbits the star and that our view is along the plane of the orbit. Then approximate-
(a) planet's mass in terms of Jupiter's mass mj and
(b) planet's orbital radius in terms of Earth's orbital radius rE.
Question2
A assured type of laser emits light that has a frequency of 7.3 × 1014 Hz. The light, however, occurs as a series of short pulses, each lasting for a time of 4.0 × 10-11 s.
(a) How numerous wavelengths are there in one pulse?
(b) The light enters a pool of water. The frequency of light remains the similar, but the speed of the light slows down to 2.3 x 108 m/s. How several wavelengths are there now in one pulse?
You are to build a box whose height is 0.280 times its length. In order for the box to have a given volume while using a minimum amount of cardboard, what should be the ratio of the width of the box to its length.
A painter is using a ladder to paint the outside of a house. The ladder, which is 8.44 m long and has a mass of 23.7 kg, Calculate the net torque acting on the ladder
A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.80 cm into the water. What is the weight of the truck
A single loop of wire of radius 3 cm carries a current of 2.9 A. What is the magnitude of B on the axis of the loop at the following the center of the loop
What voltage must be applied to the 5.00 µF capacitor of a heart defibrillator to store 550 J in it? Find the amount of stored charge
A fox locates its prey under the snow by slight sounds rodents make. how long the fox is in the air
A cockroach with mass m runs counter clockwise around the rim of a lazy Susan (a circular dish mounted on a vertical axle) of radius R and rotational inertia I with frictionless bearings.
A boat moves 15 .0 km across a lake in 30.0 min. What is the average speed of the boat in kilometers per hour
Suppose you point a pinhole camera at a 15-m-tall tree that is 75m away. If the film is 22cm behind the pinhold, what will be the size of the tree's image on the film
What is the vertical force on the support closest to piano.
With what minimum speed should you toss a 140g ball straight up to hit the 11.0m-high roof of the gymnasium if you release the ball 1.30m above the ground? Resolve this problem using energy.
A single conservative force acts on a 5.30-kg particle within a system due to its interaction with the rest of the system, calculate the work done by this force on the particle
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