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A lovesick lad wants to throw a bag of candy and love notes into the open window of his girlfriend's bedroom 10.0 m above. The bag just reaches the window, if he throws it at 60.0 degrees above ground.
a) At what velocity should she throw the bag?
b) How far from the house is he standing when he throws the bag?
Co-60 is often used as a radiation source in medicine. It has a half-life of 5.25 years. How long, after a new sample is delivered, would the activity have decreased to about 1/3 its original value.
A metal rod 0.72m long moves with a speed of 2.2m/s perpendicular to a magnetic field. what is the strength of the magnetic field
Two boxes of mass 4.70 and 2.70 kg are in contact and are accelerated across a horizontal surface by an force of 28.24 N applied parallel to the surface and pushing on the lighter box. Find the acceleration of the two boxes
Two blocks with masses, 2.5kg and 3.5kg, rest on a frictionless surface and are connected by a light string, What is the magnitude of the force in the string
The other string is plucked in a different location, primarily exciting the 5th harmonic. The resulting sounds give rise to a beat frequency of 342 Hz. What is the wave propagation speed on the guitar strings?
The front, convex, surface of a lens made for eyeglasses has a radius of curvature of 12.4cm, and the back, concave, Calculate the focal length of the lens
While snorkeling you hear a dolphin's sound as it approaches at 5.00 m/s. what is the actual frequency being emitted
A 2.46 x 10-2-kg block is resting on a horizontal frictionless surface and is attached to a horizontal spring whose spring constant is 110 N/m. The block is shoved parallel to the spring axis and is given an initial speed of 10.4 m/s, while spring is..
Briefly describe: (a) Charging by friction (b) Charging by contact (c) Charging by induction *In one sentence if possible.
If an airplane has airspeed 100 km/hr southwest but is traveling 140 km/hr south relative to the ground
At t = 0, a particle leaves the origin with a velocity of 12 m/s in the positive x direction and moves in the xy plane with a constant acceleration of (-2.0i+4j) . At the instant the y coordinate of the particle is 18 m, illustrate what is the x ..
A cube of side 8.50cm is placed in a uniform field E=7.50×103 N/C with edges parallel to the field lines, What is the net flux through the cube, What is the flux through the right face
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