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A projectile of mass 2.5 kg is fired with an initial speed of 128 m/s at an angle of 67? with the horizontal. At the top of its trajectory, the projectile explodes into two fragments of masses 0.88 kg and 1.62 kg . The 1.62 kg fragment lands on the ground directly below the point of explosion 4.7 s after the explosion. The acceleration due to gravity is 9.81 m/s 2. Find the magnitude of the velocity of the 0.88 kg fragment immediatedly after the explosion. Answer in units of m/s.
A space vehicle is coasting at a constant velocity of 21.5 m/s in the +y direction relative to a space station. Find the direction of the vehicle's velocity relative to the space station
Which statement is true concerning the magnitude of the net force on the plane.
what is the direction of the current low in the wire segment closest to you labelled by i in the figure and which direction will the loop rotate (clockwise or counter clockwise)?
An iron bolt of mass 75.0 gram hangs from a string 30.1 centimeter long. The top end of the string is fixed. Evaluate the magnetic force on the bolt
The nucleus of an atom can be modeled as several protons and neutrons closely packed together. Each particle has a mass of 1.67 10-27 kg, Estimate the density of the nucleus of an atom
A 5kg piece of metal displaces 0.75L of water when submerged. What is the buoyant force on the piece of metal? Give your answer in Newtons
An object is in free fall and at some point above the ground it has 43 Joules of kinetic energy and 24 Joules of potential energy if the ground is the y = 0 m p
Through a particular thunderstorm, the electric potential between a cloud and the ground is V cloud – V ground = 2.9 x 108 V, with the cloud being at the higher potential. What is the change in an electron's potential energy when the electron moves f..
Four charges Aq,Bq,Cq, and Dq (q = 5 x 10-07C) sit in a plane at the corners of a square whose sides have length d = 80.0 cm. A charge, Eq, is placed at the origin at the center of the square.
Air expands adiabatically (no heat in, no heat out) from T = 300 K and P = 100 atm to a final pressure of 1 atm. Treat the gas as ideal with Cp/Cv = 1.4, and decide the final temperature. Compare your result to the boiling points of oxygen (90.2 K) a..
A 4.0-cm-diameter parallel-plate capacitor has a 0.54 mm gap. What is the displacement current in the capacitor if the potential difference across the capacitor is increasing at 500,000V/s?
Define a spectrum and discuss how spectra are used in astronomy. Explain how emission and absorption lines are produced and discuss the information they convey. Describe how the spectrum of an object emitting thermal radiation can be used to find the..
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