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A lady with a mass of 44 kilogram runs at a speed of 8 m/s and jumps onto a giant 30 kilogram skateboard initially at rest. Find the combined speed of the lady and skateboard?
If a star formation switched off in a spiral galaxy, which part of it would get fainter? Bulge, disk, halo, dark matter or globularclusters? What is the essential dissimilarity between formation of spiral and elliptical galaxies?
A horizontal string tied at both ends is vibrating in its fundamental mode. The traveling waves have speed v, frequency f, amplitude A, and wavelength l.
A nucleus of mass number A, initially at rest, absorbs a neutron which is moving very slowly (of negligible kinetic energy). The rest mass of the neutron is 1.0087 u. An alpha particle of mass 4.0026u leaves the reaction with velocity 1.95 × 107 m..
Vector A is 5.5 cm long and points along the x axis. Vector B is 7.5 cm long and points at +30° above the negative x axis. Determine the sum of these two vectors in terms of magnitude and direction
A 34cm -tall, 6.0cm -diameter cylindrical beaker is filled to its brim with water. What is the downward force of the water on the bottom of the beaker
A spacecraft is launched from the surface of the Earth with a velocity of 0.480c at an angle of 50.0° above the horizontal positive x axis. Determine the magnitude and direction of the velocity of the first spacecraft as measured by the pilot of the..
A 6 kg block slides along a frictionless horizontal surface. The block is acted on by two forces, a 4.5 N force to the left, and a 7.5 N force to the right. At what rate is the 4.5 N force doing work on the block at the instant when its speed is 4..
In an LC circuit where L = 12 mH and C = 30 μF with anelectromagnetic oscillation the current amplitude is 2.5mA. find the natural frequency and the period of the oscillation
an object has a kinetic energy of 312 J and a momentum of magnitude 20.3 kg × m / s 1, find the speed of the object
A certain β-decay process has three components, with maximum energies 0.672, 0.536, and 0.256 MeV. find the mass difference between the nuclear ground states
In the figure below a 21 V battery is associated across capacitors of capacitances C1 = C6 = 4.0 μF and C3 = C5 = 2.5C2 = 2.5C4 = 4.0 μF. What are the (a) potential V3 across and (b) charge q3 (in C) on capacitor 3? (a) NumberUnitsV (b) NumberUnitsC
A circular wine barrel 75 cm in diameter will burst if the netupward force exerted on the top of the barrel is 6490 N. What weight of water must be poured into the tube
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