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When twelve moles of hydrogen and six mole of oxygen react to form twelve moles of water, the energy released is 2904 kJ. How much does the mass of the elements decrease in this reaction?
What % of the total original mass of the system does this mass change represent?
A 78 g ice cube at -18°C is placed in a lake whose temperature is 12°C. Calculate the change in entropy of the cube-lake system as the ice cube comes to thermal equilibrium with the lake. The specific heat of ice is 2220 J/kg·K. (Hint: Will the ice c..
Four (and only four) full spectral orders can be seen on either side of the central maximum, find the maximum number of slits per cm for the grating
The most common isotope of a single nucleus (stripped of its electrons) is accelerated from rest through a potential difference of 1200V, What element is the unknown nucleus on periodic table
q1. a car carrying a 75 kg test dummy crashes into a wall at 31 ms and is brought to rest in 0.10 s. find the average
A sound source emits sounds of frequency 210 Hz that travel through still air at 340 m/s. This sound source moves with a speed of 75 m/s relative to still air toward a stationary listener.
Monochromatic light of wavelength 600 nm illuminates a single slit of width 6.5 um and a diffraction pattern is created on a wall. The central maximum has a width of 3.5m. Determine the separation between the slit and the wall.
A uniform magnetic field is aligned with the axis of a solenoid having a radius of 0.25m. What is the induced emf in the coil
In an action-adventure film, the hero is supposed to throw a grenade from his car, which is going 94.0 km/h, to his enemy's car, which is going 112 km/h. Find the magnitude of the velocity relative to the earth
You throw a ball horizontally off a roof. the time until it lands is determined only by The height of the roof and it's initial speed
While running a marathon, a long-distance runner uses a stopwatch to time herself over a distance of 100. How long will it take her to run a mile at this speed
A compact disc rotates from rest up to an angular speed of 31.4 rad/s in a time of 0.892 s. What is the magnitude of the tangential acceleration
A teenager pushes tangentially on a small hand-drivenmerry-go-round and is able to accelerate it from rest to afrequency of 17 rpm in 9.7 s. What is the torque required to produce the acceleration
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