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You are watering your lawn with a hose when you put your fingerover the hose opening to increase the distance the water reaches.If you are pointing the hose at the same angle, and the distancethe water reaches increases by a factor of 4, what fraction of the hose opening did you block?
a dolphin leaps out of the water at an angle of 23.3 deg above the horizontal. the horizontal component of the dolphins
even as Jo moves off in the opposite direction at a speed of 1.27m/s. assuming that friction is negligible, find out Al's mass.
You might have seen basketball showoffs spinning a ball on the tip of a finger. If such a player performs 1.93 J of work to set the ball spinning from rest, at what angular speed will the ball rotate
q. 1. what physical quantities can be represented by vectors? why? how do you determine the resultant force of the
What is the frequency of sound put out by the engine of a car moving at 90km/hr if its four-cylinder engine makes 2000 revolutions per kilometer
A solar collector is placed in direct sunlight where it absorbs energy at the rate of 910 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.79. What equilibrium temperature does the collector reach? Assume that ..
Low-frequency vertical oscillations are one possible cause of motion sickness, with 0.20 hz having the strongest effect. How much time elapses between two waves hitting the ship
a horizontal 30-cm-long conducting rod is rolling along two conducting rails that are parallel to the x-axis. the rod
A 45.5-g golf ball is driven from the tee with an initial speed of 47.3 m/s and rises to a height of 30.4 m. evaluate the kinetic energy of the ball at its highest point
A 17 g lead bullet traveling at 218 m/s passes through a thin iron wall and emerges at a speed of 161 m/s. what will be the temperature rise of the bullet
find the tension in each of the two ropes supporting a hammock if the first one is at an angle of 20.9deg above the
You need to use your cell phone, which broadcasts an 720 MHz signal, but you're behind two massive,radio-wave-absorbing buildings that have only a 13 m space between them. What is the angular width ofthe electromagnetic wave after it emerges from bet..
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