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An automobile emits 20 lbs of CO2 per gallon of gasoline burned. If the U.S. burns 200 million of gallons of gasoline every year, how many billions of lbs of CO2 are emitted every year?
A 79 kg pole-vaulter falls from rest from a height of 4.6 m onto a foam-rubber pad. The pole-vaulter comes to rest 0.30 s after landing on the pad. compute the athlete's velocity just before reaching the pad.
Consider a simple cubic crystal structure with a cube edge a= 3.5x10^-10 m and suppose it is used to scatter 3.10x^-10 m x-rays, Find the Bragg angle theta
An object of mass b has a speed that changes with distance d according to v = bx^-n. What is the force as a function of d? What is the position as a function of time d(t=0)=d(initial).
A person with perfect pitch sits on a bus bench listening to the 441-Hz horn of an approaching car. If the person detects a frequency of 479 -Hz, how fast is the car moving.
Find the size of the net force produced by a 7 N and an 12 N force in each of the following arrangements. (a) The forces act in the same direction. N= (b) The forces act in opposite directions. N= (c) The forces act at right angles to each other. ..
A person with perfect pitch sits on the bus bench listening to the 442 Hz horn of an approaching car. If the person detects a frequency of 479 Hz, how fast is the car moving.
How much must this spring be stretched to store.
An 82 kg parachutist descends through a vertical height of 350 m with constant speed. Find out the increase in entropy produced by the parachutist; assume the air temperature is 21 degrees C.
The distance between a loudspeaker and the left ear of a listener is 1.60 m. compute the time required for sound to travel this distance if the air temperature is 20° C.
The temperature of a copper bar rises by 10.0°C when it absorbs 2.03 kJ of energy by heat. The mass of the bar is 525 g
What capacitance must be used in this circuit if the time constant is to be 3.4 ms.
Find the critical angle of incidence for a ray of light going from a diamond to air
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