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A car is traveling at 95.0 km/hr when it collides with a stone wall. The car comes to rest after the first 30.0 cm of the car is crushed. What was the average horizontal force acting on a 68.1 kg driver while the car came to rest? If 5 cardboard boxes, each 1.25m wide and filled with sand had been placed in front of the wall, and the car moved through all that sand before coming to rest, what would the average force acting on the driver have been then?
A parallel-plate capacitor has a plate area of 1cm^1 and a plate separation of 2.5 mm. To obtain an electric field of 1.0*10^6N/m between the plates, the magnitude of the charge on each plate should be.
You use an elevator to travel from the first floor (h = 0) to the fifteenth floor of a building (h = 45 m). what is the work done by gravity on you
What is the longest wavelength of light that can be absorbed by a hydrogen atom that is initially in the second excited state
A beam of light is traveling in air and strikes a material. The angles of incidence and refraction are 51.8° and 43.2°, respectively
In a local bar, a customer slides an empty beer mug down the counter for a refill. The height of the counter is 1.16 m. find With what velocity did the mug leave the counter
A gymnast of mass 69.0 kg hangs from a vertical rope attached to the ceiling. You can ignore the weight of the rope and assume that the rope does not stretch. Use the value 9.81 for the acceleration of gravity.
If a 12 V battery is used to charge this capacitor, what is the total charge stored what is the magnitude of the electric field between the plates what is the energy stored on the capacitor
Find the work done by 2.54 moles of an ideal gas if its volume doubles at a constant temperature of 23.6°C. Find the heat absorbed by the gas
Typical field strengths are a few femoteslas (1fT=10^-15T). An adult brain is about 140mm wide, A reasonable magnetic field is 4.35fT at the sensor. According to this model, what is the current in the brain?
The center-tap to high peak voltage to each side is 22.0 V. Two silicon diodes are used to make a full-wave rectifier. Calculate the output DC voltage and the ripple voltage
A 45-kg crate is placed on an inclined ramp. When the angle the ramp makes with the horizontal is increased to 25 degrees , At what angle does the crate begin to slide
Using a Time Domain Reflectometry (TDR) probe (rod length 30 cm) to estimate the soil water content of a wet sandy loam soil. alculate the volumetric wetness of the soil using the Topp and Davis (1985) equations
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