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Problem: Wording survey questions. Comment on each of the following as a potential sample survey question. Is the question sufficiently clear? Is it slanted toward a desired response?
(a) "Some cell phone users have developed brain cancer. Should all cell phones come with a warning label explaining the danger of using cell phones?"
(b) "Do you agree that a national system of health insurance should be favored because it would provide health insurance for everyone and would reduce administrative costs?"
(c) "In view of the negative externalities in parent labor force participation and pediatric evidence associating increased group size with morbidity of children in day care, do you support government subsidies for day care programs?"
A 1.40-kg block slides with a speed of 0.950 m/s on a frictionless horizontal surface until it encounters a spring with a force constant of 734 N/m. The block comes to rest after compressing the spring 4.15 cm.
A push on a 1-kg brick accelerates it. Neglecting friction, to equally accelerate a 10-kg brick, one would have to push with. A car drives west at 60 mph and then turns south driving at 60 mph for the rest of the trip. What is the direction of the av..
To help you think about how illuminance varies with distance, suppose a small light source is placed at the center of two transparent spheres. how much of the light passes through the first sphere
A 45.6-kg girl is standing on a 155-kg plank. Both originally at rest on a frozen lake that constitutes a frictionless, flat surface. The girl begins to walk along the plank at a constant velocity of 1.40 m/s relative to the plank. (a) What is the ve..
A gas expands from 1 m3 to 2 m3 at a constant pressure of 500 Pa. Compute how much heat went into the gas
A transformer has the voltages 121 Vpri and 45 Vsec. What is the current flowing in the secondary
A small light planet has a mass 1/100 that of Earth and radius 1/4 that of Earth. An astronaut weighs 600N on Earth. How much would the astronaut weigh on the surface of the smaller planet?
A dart is fired at ground level with an initial speed of 42 m/s, at an angle of 25° above the horizontal. What is the horizontal distance, in meters, from where the dart was launched to where it lands
The number of states is expressed as a function of various parameters for three systems below. For each, find an "equation of state" which gives the relationship between p, V, N, and T.
First, assume that the collision is entirely inelastic. Calculate and describe the final state for these objects. Calculate the total energy for this system before and after the collision. Is mechanical energy conserved? If not, account accoun..
An electron is accelerated through 2.85 103 V from rest and then enters a uniform 2.40-T magnetic field. What is the maximum magnitude of the magnetic force this particle can experience
A machine carries a 5.0 kg package from an initial position of di = (0.50 m) i + (0.75 m) j + (0.20 m) k at t = 0 to a final position of df = (7.80 m) i + (13.0 m) j + (7.30 m) k at t = 15 s. find the power of the machine's force on the package
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