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In a regression of Y on the two explanatory variables X1 and X2, the F ratio was found not to be significant. Neither t ratio was found to be significant, and R2 was found to be 0.12. Do you believe that multicollinearity is a problem here? Explain.
Recent studies have raised concern about `heading' in youth soccer (i.e., hitting the ball with the head). A soccer player `heads' a size 5 ball, deflecting it by 36.0 deg, but keeping its speed of 10.40 m/s constant. A size 5 ball has a mass of a..
the potential of a typical storm cloud can be as high as 109 volts. when lightning is produced a typical lightning
Two identical clocks are synchronized. One is then put in orbit directed eastward around the Earth while the other remains on the Earth. Which clock runs slower? When the moving clock returns to the Earth, are the two still synchronized?
A 5.00 g object moving to the right at +20.0 cm/s makes an elastic head-on collision with a 10.0 g object that is initially at rest. Estimate the percentage of the initial kinetic energy transferred to the 10.0 g object
Water flowing through a garden hose of diameter 2.73 cm fills a 22.0 L bucket in 1.20 min. What is the speed of the water leaving the end of the hose?
A small object is 10 cm to the left of a converging lens (f = +5 cm), and a second diverging lens (f = -2.8 cm) is 2.9 cm to the right of the first. Find the position and magnification of the final image
Jeffrey is driving his Toyota Prius the freeway and reaches his exit. The exit has a radius of curvature of 25m and is banked 38°. How fast can Jeffrey travel around the curve on a dry day
If we observe a stars spectrum and find that the peak power occurs at the border between blue and ultraviolet light, what is the surface temperature of the star in Celsius
Consider two masses (M=50 kg, m = 10 kg) connected by a string as shown below. Find the tension in the connecting string
A Styrofoam slab has thickness h and density ?s . When a swimmer of mass m is resting on it, Find the area of the slab
Breathing deep, your professor inhales air at 0.203 m/s. As the air goes through a constriction in his bronchus, it doubles in speed. How much does the air pressure drop in the constriction
In a Compton scattering experiment, an x-ray photon scatters through an angle of 21.0° from a free electron that is initially at rest. The electron recoils with a speed of 2,520 km/s. Calculate the wavelength of the incident photon.
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