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The distance between the parking garage and the classroom is 240 m. You start walking to your Physics class from your car, and in 1 min you are exactly half-way there. However, you realize that you forgot your calculator in your car. You immediately turn around and walk at the same pace to the garage, grab your calculator and walk to your class (also at the same pace).
What is your average velocity? What is your average speed?
One recent study has shown that x rays with a wavelength of 0.0050 nm can produce significant numbers of mutations in human cells. Calculate the energy in eV of a photon of radiation with this wavelength.
Waves of amplitude 2.4 cm move along a 2-m string that has a mass of 5 g and a tension of 160 N. What is the power transmitted along the string when it vibrates in its fundamental mode? What is the fundamental frequency of the string?
On a 7.2 m length of string, you count 5 crests and 4 troughs. What is the wavelength of the waves on the string
A lens placed at the origin with its axis pointing along the x axis produces a real inverted image at x=-24cm that is twice as tall as the object
An air-core solenoid has a length of 27.1 cm, a cross-sectional area of 0.0454m2, By how much does the magnetic flux through the solenoid change
A balloon is filled with 5.45 liters of helium at a pressure of 1.35 atm and a temperature of 24.0° C. Discover the mass of the helium. Discover the buoyant force on the balloon if it is placed in the atmosphere with air pressure at 1.00 atm and temp..
A transformer on a utility pole operates at an Vp = 8:5 KV rms on the primary side and supplies electric power to a number of nearby houses at Vs = 120 V rms. What is the turn ratio, Np=Ns, of this step-down transformer
What will be the hang time if the player reaches the same height while jumping 4 feet -
A car traveling at 25 m/s ( about 55 mph) crashes into a road barrier and comes to a stop in 0.2 sec. What is the average force in Newtons felt by a 75 Kg person in a set belt
What is the resistance of a 1.7m -long copper wire that is 0.50mm in diameter? (Answer should be in ohms)
An electron confined in a harmonic potential well emits a 1280nm photon as it undergoes a 5 ? 4 quantum jump. What is the spring constant of the potential well
If a 25-gram bullet with a speed of 330 m/s travels 15 cm into a tree before stopping, what's the average force exerted to stop the bullet
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