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A 15.0g bullet with a speed of v=235m/s is fired into a block of wood that is initially at rest on a frictionless surface. Determine the mass of the wooden block
A sled is being pulled across a horizontal patch of snow. Friction is negligible. By what percentage would the sled's kinetic energy have increased
A 12kg hammer strikes a nail at a velocity of 8.2m/s and comes to rest in a time interval of 8.0. What is the average force acting on the nail
A tetrahedron contains a point charge Q = 65 nC. Find the electric flux through the surface of the tetrahedrom. Find the flux through each face of the tetrahedron
When a 0.20-kg mass is suspended from a vertically hanging spring, it stretches the spring from its original length of 3.0 cm to a total length of 7.0 cm. What is the maximum speed of the mass as it
A 35 mm camera with interchangeable lenses is used to take a picture of a hawk that has a wing span of 1.5 m. The hawk is 39 m away. What would be the ideal focal length of the lens used
Find the focal length of a glass lens that has an index of refraction equal to 1.58, a concave surface that has a radius of curvature of magnitude 104 cm, and a convex surface
Because it can go from rest to 27.0 m/s (about 60 mi/h) in 4.0 s, one of the fastest-accelerating animals is the cheetah. determine the average power developed by the cheetah
A piece of thin spherical shell that has a radius of curvature of 92 cm is silvered on both sides. How far was the mirror moved
An electric motor rotating a workshop grinding wheel at a rate of 9.70 101 rev/min is switched off. How long does it take for the grinding wheel to stop
An unstable nucleus of mass 2.9 10-26 kg, initially at rest at the origin of a coordinate system, Find the magnitude and direction of the velocity of the third particle
The reaction will become more spontaneous. B) The spontaneity of the reaction will not change. C) The reaction will become less spontaneous. D) ?G will decrease. E) K will decrease.
The Fermi energy of silver at 300 K is 5.48 eV. What is the average energy of a conduction electron in silver at 300 K
Write the equilibrium constant expression for the reaction : 3A + B <-> 2C 2) Calculate Kc for the above reaction if [A] = 6.1 x 10^(-3) M; [B] = 3.9 x 10^(-1) M; and [C] = 5.0 x 10^(-5) M at
A 7 kg sled is initially at rest on a horizontal road. determine the change in the kinetic energy of the sled
Suppose you have a Mo-W alloy that is 70 wt% W. Describe a process that would allow you to isolate an enriched mixture that is 80 wt% W. What would your yield be for a two-step process
A record was set for stair climbing when a man ran up the 2000 steps of the Empire State Building in 13 minutes and 10 seconds. what was his average power output during the climb
Coasting along at 8.10 m/s, a 60.0 kg bicyclist on a 8.60 kg bicycle encounters a small hill. how much work was done on the bicyclist and her bike
The phase behaviors of Mo-W mixtures and Mo-Si mixtures are markedly different. Give a detailed explanation for why this is.
Calculate the time it will take this block when released from rest to travel a distance of 0.3 m along the ramp
A 4.4-m-tall, 30-cm-diameter concrete column supports a 5.0×105kg load. By how much is the column compressed
A 70- kg child sits in a swing suspended with 3.3- m-long ropes. determine the speed the child will have at the bottom of the arc
A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5 730 yr) for every 7.70 1011 stable carbon atoms. Find the number of carbon atoms in the sample
An unknown solution forms a white precipitate when treated with 6 M HCL. The precipitate is incompletely soluble in hot water but dissolves completely in NH3. What ion(s) are definitely present
How much energy is emitted when electron in hydrogen atom undergoes a transition from n=5 to n=2 level. what is the wavelength of this emission. what is the frequency