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A researcher is interested in whether drinking different sources of caffeine (tea vs. coffee) leads to differences in women's attentional control performance. She decides to put up flyers at Her Gym locations around Texas to recruit participants. People can read the flyer and contact her to participate if they are interested in the study. She decides to have participants take an attention task called "Simon task" after drinking either 2 cups of black tea or after drinking 2 cups of regular coffee. She randomly assigns her participants to either the tea or the coffee beverage condition. After collecting and analyzing the data, she obtains a p = .027.
1) What type of sample is the researcher using? And what is a disadvantage to using this sample type?
Two satellites, C and D, are in different circular orbits about the earth. Determine the ratio of the periods of the satellites
A spectral line from the left side of Saturn's rings, as you see them, Which way (direction) is Saturn rotating, and why
Calculate its electrical resistivity at 0 oc, if the classical value of mean free time at this temperature is 3 × 10-14 s.
The captain of a spaceship spots an asteroid moving towards her ship as shown below. Find the location of the collision and the velocity of the spaceship
To light the Olympic flame, an archer shoots and arrow into the air toward the cauldron where the flame is to be ignited. What are the initial magnitude and direction of the velocity
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A 4.0kg mass is attached to a spring that has a spring constant, k =2500 N/m, and is resting on a frictionless horizontal surface. What is the maximum velocity of the block
A current-carrying 2.0 cm long segment of wire is inside a long solenoid (radius=4.0cm, 800 turns/m, current = 50mA). what is the magnitude of the magnetic force on this segment
The mass of the nuclide ^19_9F is 18.998u. What is the total binding energy for this nucleus
In experiment PH04a, for the resistors in parallel circuit configuration, if we added to the circuit two additional parallel legs with each leg having a single 50 Ohm resistor
A simple capacitor is made by placing two spheres of radii p at a distance d>>p apart. Find the capacitance of the system of two spheres
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