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A boy on a 2kg skateboard initially atrest tosses an 8kg jug of water in theforward direction. If the jug has a speed of 5m/s relative to the ground and the boy andskateboard move in the opposite direction at 0.6m/s, find the boy's mass.
A 21.0 g copper ring at 0.000°C has an inner diameter of D = 2.54000 cm. An aluminum sphere at 108.0°C has a diameter of d = 2.54508 cm, What is the mass of the sphere
What is the sound intensity level. One on an Incline--One Hanging A block of mass mA = 4.50 kg on a frictionless inclined plane of angle 30.0° is connected by a cord over a massless, frictionless pulley to the second block of mass mB = 2.80 kg ha..
a truck horn emits a sound with a frequency of 245 hz. the truck is moving on a straight road with a constant speed.
Find the critical angle of incidence for a ray of light going from a diamond to air
A conservative force, f(x) = -2x+3x4 is applied to a mass m (f in Newtons and x in meters). what is the change in the potential energy of mass
The two headlights of an approaching automobile are 1.5 m apart. Assume that the pupil diameter of theobserver is 4.4 mm, find At what maximum distance will this occur
a he ion is placed in an excited state so that its remaining electron occupies the n5 state. the electron can make a
A copper kettle contains water at 23.4 °C. When the water is heated to 99.5 °C, Determine the volume of the kettle
An ordinary glass is filled to the brim with 334.0 mL of water at 100°C. If the temperature decreased to 12°C, how much water could be added to the glass
You take a set of measurements for the wavelengths and frequencies of standing waves on a string that is under a tension of 1.96 N. What is the linear mass density of the string
a plant falls from the windowsill of an apartment in a very tall building. if the floor of your apartment is 33.53 m
A weightlifter bench-presses a 130.0 kg barbell from his chest to a height equal the length of his arms 0.850 m. How much work does he do
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