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Problem:
A medical experiment compares an antidepressant medicine with a placebo for relief of chronic headaches. There are 36 headache patients available to serve as subjects. To choose 18 patients to receive the medicine, you would
(a) assign labels 01 to 36 and use Table B or a random number generator to choose 18.
(b) assign labels 01 to 18, because only 18 need to be chosen.
(c) assign the first 18 who signed up to get the medicine.
A driver runs horizontally off the end of a driving tower 3.0 meter above the surface of the water with an initial speed of 2.6 m/s. Compute how many revolutions has she made when she hits the water
High-speed stroboscopic photographs show that the head of a 170-g golf club is traveling at 47 m/s just before it strikes a 46-g golf ball at rest on a tee, Find the speed of the golf ball just after impact
Vector A~ has a magnitude of 9 and points in the positive x-direction. Vector B~ has a magnitude of 19 and makes an angle of 38? with the positive x-axis
Calculate the intensity of the electric field produced by q1 and q2 at the point where q3 is. Calculate the net force on q3. Calculate the total potential energy of the system of charges.
IP An rms voltage of 12.5V with a frequency of 1.10kHz is applied to a 0.375?F capacitor. Calculate the current for a frequency of 2.20kHz
In an L-R-C series circuit, the rms voltage across the resistor is 28.0V , across the capacitor it is 91.0V, What is the rms voltage of the source
A 7.7cm diameter horizontal pipe gradually narrows to 6.7cm . When water flows through this pipe at a certain rate, What is the volume rate of flow
A 6.4g lead bullet traveling at 460m/s is stopped by a large tree. If half the kinetic energy of the bullet is transformed into internal energy and remains with the bullet while the other half is transmitted to the tree, what is the increase in te..
A small, 300 g cart is moving at 1.10 m/s on an air track when it collides with a larger, 4.00 kg cart at rest, What is the speed of the large cart after the collision
An electron is initially at rest just outside a large copper surface that has a charge density of 1.04 10-6 C/m2. How far has the electron moved in 1.12 10-9 s if the field is uniform over this region
The electric motor of a model train accelerates the train from rest to 0.600 m/s in 17.0 ms. The total mass of the train is 585 g. Find the average power delivered to the train during its acceleration
two strings each 18.0m long are stretched side by side. one string has a mass of 87.0g and a tension of 220.0n. the
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