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Two waves A and B, both of wavelength λ = 51.7-cm, are initially out of phase by π. I want to bring them back in phase by placing some mirrors along the path of wave B as shown in the figure. What is the minimum spacing L required to achieve this?
Two trains on separate tracks move toward each other. Train 1 has a speed of 125 km/h; train 2 a speed of 84.0 km/h. What is the frequency heard by the engineer on train 1
A diver springs upward from a board that is three meters abovewater. At an instant he contacts the water his speed is 9.20 m/sand his body makes an angle of 78.0o with respect to the horizontalsurface of the water.
In a football game a kicker attempts a field goal. The ball remains in contact with the kicker's foot for 0.0205 s, through which time it experiences an acceleration of 220 m/s2. The ball is launched at an angle of 56.5° above the ground. Decide the ..
The platter of the hard drive of a computer rotates at 7100 rpm = revolutions per minute = rev/min). Find the angular velocity of the platter
A spring is resting vertically on a table. A box is dropped onto the top of the spring and compresses it. Obtain the magnitude of the spring displacement at an instant when the acceleration of the box is zero
A spring has a spring constant = 40 N/m. It is compressed by a distance 10 cm. The mass of the cart is 300 grams. The angle of incline of the track is 20º.
The magnetic field is always perpendicular to the velocity of the charge. Magnetic fields deflect moving charges. Magnetic fields are created by moving charges.
a 25 kg box is acted on by a 45 n horizontal force. if the box accelerates at a rate of .75 ms2 what is the coefficient
In compressing the spring in a toy dart gun, 4 Joule of work is done. Calculate the dart kinetic energy as it leaves the gun
A vacuum gauge connected to a tank reads 30.0 kPa. If the local atmospheric pressure is 13.5 psi, What is the absolute pressure in units of psi
The Sahara desert with a very arid climate is one of the hottest regions in the world. Find by how many Celsius degrees does the temperature fall in the 24-hr period
An astronaut with a total mass of 68.5 kg lands on a distant planet. The astronaut weighs himself on the surface of the planet and finds that his weight is 425.0 N. What is the magnitude of the gravitational acceleration on this planet?
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