Watch the YouTube video, link below. Using a demand/supply diagram, explain how reduced milk prices may have resulted from:
https://www.youtube.com/watch?v=7KPWLSVn0ko&t=90s
In: Economics
A square section wire of side L is traversed by a current I in the +z direction. The wire is embedded in a constant magnetic field B in the +y direction. You measure a voltage V across L in the horizontal direction. Find the number density of electrons in the metal and identify the direction of the electric field inside the wire.
In: Physics
In: Chemistry
What is the value of the equilibrium constant for the reaction of Na(s)with Pb2+ (aq)at 25° C? Eº cell = 2.58 V 2Na(s) + Pb2+(aq) ↔ Pb(s) + 2Na+(aq) 3.0 x 1043 6.0 x 10200 6.0 x 10 43 1.8 x 1087
In: Chemistry
Hydrogen also produces spectral lines at radio wavelengths, notably at 21.1 cm. If a galaxy is moving away from us at 21% of the speed of light, at what wavelength will we detect this line? Convert this into frequency.
We will detect this line at wavelength λ = ______ cm.
The frequency is v = _____ × 10^9 Hz or ______ GHz.
In: Physics
Consider a 5.00-L tank containing 375 g of Ar at a temperature
of 25 °C.
(a) Calculate the pressure in the tank using both the ideal gas law
and the van der Waals equation.
(b) Which correction term, a(n/V)2 or bn, has the great- est
influence on the pressure of this syste
In: Chemistry
In: Biology
A rectangular block of copper has sides of length 12 cm, 26 cm, and 37 cm. If the block is connected to a 5.4 V source across two of its opposite faces, find the following.
(a) What is the maximum current the block can carry?
(b) What is the minimum current the block can carry?
In: Physics
1) Find the velocity and position vectors of a particle that has the given acceleration and the given initial velocity and position.
a(t) = 7i+ 4j, v(0) = k, r(0) = i
2) Find the tangential and normal components of the acceleration vector.
r(t) = 5(3t − t3) i + 15t2 j
In: Math
A 0.046-nm x-ray is incident on a stationary electron. A
scattered photon is observed at 94°.
Find the energy of the scattered photon E'γ=
______ keV and its wavelength λ'= _________ nm
Find the kinetic energy of recoiled electron
K= _______keV
Find the speed of recoiled electron as a fraction of speed of light: v/c= ________
In: Physics