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Q1. A fellow student expresses an opinion that since the Suns spectrum has only weak absorption lines of hydrogen, this element cannot be a major constituent of the Sun. How would you enlighten this person? If a red star and a blue star both have the same radius and both are the same distance from the Earth, which one looks brighter in the night sky?
Q2. Object 1 has a mass m1 and a velocity 1 = (2.87 m/s). Object 2 has a mass m2 and a velocity 2 = (3.01 m/s). The total momentum of these two objects has a magnitude of 18.0 kg • m/s and points in a direction 66.5° above the positive x-axis. Find out m1 and m2.
Two 12-cm-diameter charged rings face each other, 17.0 apart. Both rings are charged to + 40.0. What is the electric field strength at the midpoint between two rings.
If a person radiates about 66 W of power at room temperature, how long does it take for person to radiate away the energy acquired by consuming a 230 Calorie doughnut.
The drawing shows one horizontal wire with the current going up and one vertical wire with the current going to the right. Point A is dH to the right and dV above the intersection. Point B is dH to the left and dV below the intersection.
In the 1950s, an experimental train that had a mass of 2.30 x 10^4 kg was powered across a level track by a jet engine that produced the thrust of 5.30 x 10^5 N for a distance of 504 m. unless otherwise directed, suppose that air resistance is neglig..
What is the launch speed of a projectile that rises vertically above the Earth to an altitude equal to five before coming to rest momentarily.
Problem on a hare and a tortoise battle
Differentiate between the following three types of plain carbon steels.
Charge is distributed with constant volume density D throughout the rectangular box with length a, width b and height c.
Find out the angular velocity at the beginning of the 4.60 interval; the angular acceleration of the flywheel.
What is linear acceleration
A crate of 31.9- tools rests on a horizontal floor. You exert a gradually increasing horizontal push on it and observe that the crate just begins to move while your force exceeds 345. After that you must reduce your push to 247 to keep it moving at a..
The impact on light fixture swing
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