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The ball's velocity was 1.5m/s before the collision, but after the collision it is 1.2m/s. What is the velocity of the pin just after the collision?
Lee Mealone, a hermit pushes a 16 kg boulder into the wall of his cave at a speed of 4.5 m/s, the boulder is brought to a stop in 2.3 seconds.
A circular conducting loop carries a current of 5.0 A and has radius 30 mm
Suppose a nickel (mass = 5.0 grams) is sitting on a turntable, 15.0 c, from the center. The turn-table is turning at 33-1/3 revolutions per minute.
Since the force that acts on a bullet when a gun is fired is equaland opposite to the force that cats on the gun, does this imply a zero net force.
A horizontal has a fluid flowing through it. The fluid(density = 1000kg/m^3) is flowing through it at the rate of 2 x 10^-4 m^3/s.
Radioactice substances decay exponentially. The amount of radium present at an time t obeys the law Q(t)= Qoe^-kt
A 10-kg box is pushed by from rest by a 100-Newton force at a 30 degree angle downward with respect to the horizontal.
At 300 K the reaction below obeys the rate law Rate=k[NOCl]^2, where k=2.8 X .000010 M to the neg 1 times s to the neg 1.
The second order reaction for the decomposition of nitrosyl bromide has a half life of 12.5s at a concentration of 0.100M.
The only radiogenic lead isotope that is not either stable (Pb-206, 207, 208) or with a halflife of less than one day is Pb-210, which is found in nature
A liquid with a density of 1.37*10^3 kg/m^3 flows through two horizontal sections of tubing joined end to end.
At standard Temperature and pressure sound travels at speed u=330m/s relative to the air through which it propagates
You drive a car 7 hours at 46kmh then 7 hours at 69kmh. What is your average velocity? Answer in km/h.
In a race over a distance s, runner A starts from rest and accelerates at a1 for the first distance x and then runs at constant speed.
The frictional force is negligible. The block starts from rest and moves 11.0 m in 5.00 s.
A projectile is fired with an initial velocity of 15.0 m/s at 53.0o above the horizontal from the foot of a ramp inclined 20.0o above the horizontal.
Calculate the radius of curvature of the path of a beta particle of mass 9.1 x 10^-31 kg and speed 2.0 x 10^7 m/sec perpendicular to a magnetic field of 0.50 T.
Calculate the two velocities corresponding to the scaled displacements by dividing each displacement, actual, in meters by the image time interval, 1/30 s.
A theory of nuclear astrophysics is that all the heavy elements like uranium are formed in supernova explosions of massive stars
Select the three options which are NOT examples of quantities that could be modeled by exponential growth or decay.
A radioactive source has a half life of 74 days and an activity of 370 MBq. what was the activity 30 days ago?
A wheel starts from rest and rotates about its axis with constant angular acceleration.
An 85-kg jogger is heading due east at a speed of 2.0 m/s. A 55-kg jogger is heading 32° north of east at a speed of 3.0 m/s.
A source has a half-life of 12 hours and an initial activity of 10mCi. After 4 days what is its activity?