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A person pushes a 14.0 kilogram lawn mower at constant speed with a force of 85.0 Newton directed along the handle, which is at an angle of θ= 47.0 degree to the horizontal.
Determine the force the person must exert on the lawn mower to accelerate it from rest to 1.6 m/s in 2.0 s (assuming the retarding force to be 57.97 (in the horizontal direction)).
A meter stick is found to balance at the 49.7 cm mark whenplaced on a fulcrum. What is the mass of the meter stick
A 10.0-g wad of sticky clay is hurled horizontally at a 110-g wooden block initially at rest on a horizontal surface. what was the speed of the clay immediately before impact
radiocarbon is produced in the atmosphere as a result ofa.collision between fast neutrons and nitrogen nuclei present
What is the pressure amplitude of a sound wave with an intensity level of 121.5 dB in air
A speeder is racing down the road at a constant speed of 90mi/h. A police officer is having coffee while the speeder zips past her. How Far down the road does the officer catch the speeder
In a large centrifuge utilized for training pilots and astronauts, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. A trainee riding in the chamber of a centrifuge rotating with a constant angular speed of 2.6 r..
The larger molecule HI has a bond length of 160.92 pm (H=1, I=127). its bond's force constant is 314 N/m. what are the frequencies of light for that will excite the lowest energy rotational and vibrational translations
suppose our experimenter repeats his experiment on a planet more massive than earth where the acceleration due to
A storage tank at STP contains 19.1 kg of nitrogen What is the volume of the tank. What is the pressure if an additional 15.7kg of nitrogen is added without changing the temperature.
a helium baloon is used to lift something which weighs 100n. the layer of the baloon weighs 50n and the volume of the
A block of mass 2.0 kg oscillates on a spring with spring constant k= 5 N/M. what is the period of oscillation is rad/s?, what is the new period of oscillation
A man standing 1.52 m in front of a shaving mirror produces aninverted image 18.0 cm in front of it. How close to the mirror should he stand if hewants to form an upright image of his chin that is twice the chin’s actualsize?
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