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Propose a longitudinal study and a cross-sectional design being sure to identify the independent and dependent variables and discuss how you might be able to avoid the confounding that results from the presence of age in these quasi-experimental designs.
A Van de Graa? generator has a potential di?erence of 2.35 MV between the belt and the outer shell. What minimum power is needed to drive the moving belt
How long would it be on the incline before it arrives back at bottom.
Examine the assumptions and limitations of the statistical study. What would you have done differently in this case? Explain your answer. Identify how the authors applied statistical testing to the problem
One end of a brass bar is maintained at 298°C, while the other end is kept at a constant but lower temperature. What is the temperature of the bar at a point 0.24 m from the hot end
The two wires of length 2m are 3mm apart and carry a current of 10 A dc. Calculate the force between these wires
A series of pulses of amplitude 0.22 meter is sent down a string that is attached to a post at one end. Find the amplitude at a point on the string where two pulses are crossing, if the string is rigidly attached to the post
christian ramirez a small 0.12kg metal ball is tied to a very light sting 0.80m long to form a pendulum that is then
A dentist's drill starts from rest. After 3.30 s of constant angular acceleration it turns at a rate of 2.8 x 10^4 rev/min, Determine the angle (in radians) through which the drill rotates during this period
The catapult on an aircraft carrier can take an aircraft from 0 to 81.6 m/s in 11 s, at which time the aircraft launches. Evaluate the acceleration of the aircraft when it launches
In a large centrifuge used for training astronauts and pilots, a small chamber is fixed at the end of a rigid arm that rotates in a horizontal circle. Evaluate the angular acceleration in the second training exercise
The decibel level of ajackhammer is 125 dB relative to the threshold of hearing. Determine the sound intensity produced by the jack hammer
A box is sliding down an incline tilted at an angle 14.0° above horizontal. The box is sliding down the incline at a speed of 1.70 m/s. The coefficient of kinetic friction between box and incline is 0.380. How far does the box slide down the incli..
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