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two forces act on a14 kg object. the first force has a magnitude of 70 N and is directed 28 north of east. the second force is 36.5 N 48.8 south east , what is the acceleration of the object resulting from application of these two forces to the object?
The maximum torque experienced by a coil in a 0.85 T magnetic field is 8.4 10-4 N · m. What is the length of the wire from which the coil is made
A particular guitar string is supposed to vibrate at 206 Hz, but itis measured to actually vibrate at 210 Hz. By what percent should the tension in the string be changed to get the frequency to the correct value?
Original problem: a person walks at constant speedv1 along a straight line from A to B and then back alongthe line from B to A at constant speed v2. What is theaverage speed over the entire trip
An electromagnetic wave in a vacuum has a magnetic field with a magnitude of 1.29 × 10-6 T. What is the intensity S of the wave
A man sits on the south bank of a 100m wide river that flows due east at 2m/s. The man can swim 3m/s, How long will it take him to cross
the earth has a mass of 5.98 1024 kg. the average mass of the atoms that make up the earth is about 40 u. based on this
A skier starts from rest at the top of a hill that is inclined at10.5 degrees with the horizontal. How far does the skier move along the horizontal portion ofthe snow before coming to rest
A person eats a container of yogurt. The Nutritional Facts labelstates that it contains 240 Calories (1 Calorie = 4186 J). What mass of perspiration would one have to lose to get rid of thisenergy? At body temperature, the latent heat of vaporizat..
question1a person doing a chin-up weighs 725 n disregarding the weight of the arms. throughout the first 20.0 cm of the
Two people are carrying a uniform wooden board that is 3.00 m long and weights 160 N. at what point does the other person lift
A 100 kg running back carries the ball forward with a speed of 9 m/s. He is hit head on in the air at the goal line by a 130 kg defensive back running in the opposite direction at 7 m/s
A small sphere with a mass of 1.0 g is suspended at the end of an insulating string of length 50 cm within a uniform horizontal electric eld of 12,000 N/C. What is the value of the charge on the small sphere
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