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Determine the 1-day BOD and ultimate BOD for a wastewater whose BOD5 at 20°C is 200 mg/L. The reaction constant k is 0.23/day. What would have been the BOD5 if the test had been conducted at 25°C, use θ = 1.056? Hint: Find for the following in this order: (a) BODu at 20°C (b) BOD1 at 20°C c. BOD5 at 25°C.
Help me find the data for my lab report based on the "Waves Intro Simulation" on phet the lab goal for the "Waves Intro Simulation":
Explain how power is created using hydraulics and how a little cylinder on the tractor can raise or lower extreme amounts of implement weight. Explain the system including parts and functions.
The Earth has an electric field that points toward the center of the earth and that has a magnitude of 150 N/C. How much charge is needed for it to be suspended in the air
Consider the waves on a vibrating guitar string and the sound waves the guitar produces in the surrounding air. The string waves and the sound waves have the same frequency. Can someone describe why?
If, when she lands on the trampoline, she stretches the trampoline down d = 0.75 m, what is the spring constant k in N/m of the trampoline?
What is the density of Neon gas at standard temperature and pressure? The atomic mass of Neon is 20.18 atomic mass unit
A diffraction grating with 610 lines per mm is illuminated with light of wavelength 520 nm. A very wide viewing screen is 2.1 m behind the grating. How many bright fringes can be seen on the screen
A rock is thrown horizontally from a cliff that is above a lake's surfaces with a velocity of 12 m/s. How far from the cliff does the rock land
The solar wind is a thin, hot gas given off by the sun. Charged particles in this gas enter the magnetic field of the earth and can experience a magnetic force.
A pair of speakers separated by 0.700m are driven by the same oscillator at a frequency if 690Hz. an observer originally positioned at one of the speakers begins to walk along a line perpendicular to the line joining the speakers.
A bullet with mass m = 5.21 g is moving horizontally at v = 434 m/s when it strikes a block of hardned steel with mass M = 14,8 kg (initially at rest). What is the impulse (kg m/s) exerted on the block
the second half of the swim, and (c) the round trip. (Assume that time t2 is from the other end of the pool to the starting point. Use any variable or symbol stated above as necessary. Indicate the direction with the sign of your answer.)
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