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Two guns situated at the top of a hill of height 10m, fire one shot each with the same speed m/s at some interval of time. One gun fires horizontally and other fires upwards at an angle of 60degrees with the horizontal. The shots collide in air at a point P.
(1) Find the time interval between the firing..
(2) The co-ordinates of the point P.
Take origin of the coordinate system at the foot of the hill right below the muzzle and the trajectories in the x-y plane.
A car is travelling at 25 m/s when the driver slams on the brakes. The car’s acceleration is assumed to be constant at -7.44m/s2 Determine the time it takes the car to stop. Determine the distance the car traveled in 2.50 s.
A Ni-Cu alloy is prepared which has a lattice constant of 0.354 nm. The maximum magnetisation of the alloy is measured as 1.25*10^6 A/m. Assuming no interactions between Ni and Cu atoms, and the magnetisation comes from the all unpaired 3d Ni ele..
A violin string is 33 cm long. The wave speed is 140 m/s. what are the wavelengths of the first 3 harmonics
What is the thinnest soap film (excluding the case of zero thickness) that appears black when illuminated with light with a wavelength of 570 nm? The index of refraction of the film is 1.35, and there is air on both sides of the film.
You construct two wire-frame cubes, one using (infinitely thin) copper wire, the other using (infinitely thin) aluminium wire. Find the difference in volume between the cubes
in a television set electrons are accelerated from rest through a potential difference of 15 kv. the electrons then
What is the smallest number of whole bricks (including the one on the ground) that can be stacked so that their weight creates a pressure of at least two atmospheres on the ground beneath the first block? (Hint: First decide which face of the bric..
A wire is formed into a circle having a diameter of 10.3 cm and is placed in a uniform magnetic field of 2.84 mT. Find the maximum torque on the wire
a certain elevator cab has a total run of 190 m and a maximum speed of 305 mmin and it accelerates from rest and then
write a word phrase for the algebraic expression: 2t - 9
A 38 g bullet is fired with a speed of 180 m/s into a 5 kg sandbag pendulum that is free to swing. To what maximum vertical height will the pendulum rise.
A geosynchronous orbit is one in which the satellite orbits above the equator, andhas an orbital period of 24 hours, so that it is always above the same point on the spinning earth. Calculate the altitude of such a satellite.
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