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1. You are visiting NASA and are watching a test rocket launch. You estimate that at launch the angle of elevation of the rocket is 60 degress and it maintains that angle with the horizontal because of thrust. You ask one of the engineers how massive the rocket is and he replies about 3000 kg and tells you that there is about 6*10^4 N(force) of thrust acting on the rocket. 50 s into the launch the engine cuts out. The engineer sees that you are a bright student and asks you to calculate:-
(a) The altitude of the rocket when the engine cut out.
(b) The total horizontal distance from the ring point to the point of impact. (Assume the ground is level)
Esitmate the change in temperature of 5 m^3 of air, to an increase in pressure of 50 kPa. The initial temperature of the air is 15*C at atmospheric pressure
A street lamp weighs 180 N. It is supported by two wires that form an angle of 150° with each other. The tensions in the wires are equal.
The temperature near the top of Saturn's cloud layer is about 110K. The temperature at the top of earth's troposphere, at an altitude of about 20km, is about 220K. Calculate the rms speed of hydrogen molecules in both these environments
A factory worker pushes a 34.0 kg crate a distance of 3.7 m along a level floor at constant velocity by pushing horizontally on it, How much work is done on the crate by the normal force
Find the radius of an electron's orbit when it moves perpendicular to a magnetic field of 0.56 with a speed of 6.29×10^5 m/s
Some sharks respond to very weak electric fields, as weak as 1.0 µV/m. To grasp how weak this field is, how far apart would the plates have to be
two tuning forks oscillating coherently and in phase at 1200Hz are separated by 0.35m, Calculate the angles of minimum intensity
An eagle with 1.8m wingspan flaps its wings 21 times per minute, each stroke extending from 42%u2218above the horizontal to 42%u2218 below. What's the average tangential velocity of the wingtip
From what height will you have to drop the rock on Earth so that the fall-time on both planets is the same.
A 150 MW laser pulse is focused with a lens to a diameter of 1.39 %u03BCm. What is the laser beam's electric field amplitude at the focal point
In open heart surgery a much smaller amount of energy will defibrillate the heart, What voltage is applied to the 9.00 µF capacitor of a heart defibrillator that stores 55.0 J of energy
A radio antenna broadcasts a 1.0 MHz radio wave with 29kW of power. What is the wave's intensity 33km from the antenna
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