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smileycellist2 2021-01-27

Pipe A, which is 1.20m long and open at both ends, oscillatesat its third lowest harmonic frequency. It is filled with air forwhich the speed of sound is 343m/s. Pipe B, which is closed at oneend, oscillates at its second lowest harmonic frequency. Thisfrequency of B happens to match the frequency of A. An x axisextends along the interior of A, with x=0 at oneend. (a) How many nodes are along that axis? What arethe (b) smallest and (c) second smallest value of xlocating those nodes.
Any help will be appreciated. I can normally understand thesequestions but I have no idea where to begin for this one.

CMIIh 2021-01-27

A stainless-steel orthodontic wire is applied to a tooth as The wire has an unstitched length of 3.2 cm and a diameter of 0.24 mm. If the wire is stretched 0.12 mm, find the magnitude and direction of the force on the tooth. Disregard the width of the tooth and assume that Young's modulus for stainless steel is $18 \times 10^{10}$ Pa.

sodni3 2021-01-27

A 65.0 mm focal length converging lens is 78.0 mm away from a sharp image. Find the object distance using a ray diagram and by calculation.

boitshupoO 2021-01-27

Knowing that M=250N-m, determine the maximum stress in the beam shown when the radius r of the fillets is (a) 4mm, (b) 8mm.

Emily-Jane Bray 2021-01-25

A bit string, 0111101111101111110, needs to be transmitted atthe data link layer. What is the string actually transmitted after bitstuffing?

emancipezN 2021-01-25

A new absolute temperature scale is proposed. On thisscale the ice point of water is 150S and the steam point is300S. Determine the temperatures in Celcius that correspondto 100S and 400S, respectively. What is the ratio of the sizeof the S to the kelvin? Comments

coexpennan 2021-01-24

$g (t) = {\begin{cases} 0 & 0 < t < 11 & 1 < t < 36 & 3 < t < 54 & 5 < t \end{cases}$

$g (t) = \prod_{1, 3} (t) + 6 \prod_{3, 5} (t) + 4 u (t - 5)$
compute the Laplace transform of g(t)

babeeb0oL 2021-01-24

A recently-installed machine earns the company revenueat a continuous rate of 60,000t + 45,000 dollars per year duringthe first six months of operation and at the continuous rate of75,000 dollars per year after the first six months. The cost of themachine is $150,000, the interest rate is 7% per year, compoundedcontinuously, and t is time in years since the machine wasinstalled.
(a)Find the present value of the revenue earned by the machineduring the first year of operation.
(b)Find how long it will take for the machine to pay for itself;that is, how long it will take for the present value of the revenueto equal the cost of the machine?

Emily-Jane Bray 2021-01-24

A uniform meter stick with a mass of 180 g is support horizontally by two vertical strings one at the 0-cm mark and the other at the 90-cm mark
What is the tenion in the string (a) at 0 cm (b) at 90-cm

Chaya Galloway 2021-01-24

If electrical energy costs 12 cents, or $0.12, per kilowatt-hour, then what would the following events cost?
(a) Burn a 40 Wlight bulb for 24 h straight.
(b) Operate an electric oven for 6.0 hif it carries a current of 20.0 A at 220 V.

Daniaal Sanchez 2021-01-22

Traumatic brain injury such as concussion results when the head undergoes a very large acceleration. Generally, an acceleration less than $800 m / s^{2}$ lasting for any lengthof time will not cause injury, whereas an acceleration greater than $1000 m / s^{2}$ lasting for at least 1 ms will cause injury. Suppose a small child rolls off a bed that is 0.42 m above the floor. If the floor is hardwood,the child's head is brought to rest in approximately 2.2 mm. If the floor is carpeted, this stopping distance is increased to about 1.0 cm. Calculate the magnitude and duration of the deceleration in both cases, to determine the risk of injury. Assume that the child remains horizontal during the fall to the floor. Note that a more complicated fall could result in a head velocity greater or lessthan the speed you calculate.

Jaya Legge 2021-01-22

A fish is 1.2 m beneath the surface of a still pond ofwater. At what maximum angle can the fish look toward thesureface (measured with respect to the normal to the surface) in order to see a fisherman sitting on ta distant bank? (for water,n=1.333)

zi2lalZ 2021-01-22

Figure shows a rigid wire twisted into a radiused semicircle a =2.0cm is rotated at constant angular speed 40 rev/s in a uniform 20 mT magnetic field. What are the (a) frequency and (b) amplitude of the emf induced in the loop?

a2linetagadaW 2021-01-22

A square, single turn coil 0.20m on a side is placed with itsplane perpendicular to a constant magnetic field. An EMF of 18mV isinduced in the coil winding when the area of the coil decreases ata rate of 0.10m^2/s. What is the magnitude of the magneticfield?

pedzenekO 2021-01-22

Suppose you catch a baseball and then someone invites you tocatch a bowling ball with either the same momentum or the samekinetic energy as the basball. Which you would you chose? EXPLAIN.
Im not sure what do do here.
$p = m v, K = \frac{1}{2} m v^{2}$

since this has to be a completely inelastic collision i wasthining that all the bowling balls kinetic energy is going to gotozero, however, in an inelastic collision momentum is conserved, soI'm not really sure what this all means or how to determine whichis a betterchoice momentum or kinetic energy.

waigaK 2021-01-22

It is said that in ancient times a rich man with a bag of gold coins froze to death stranded on the surface of a frozen lake. Because the ice was frictionless, he could not push himself to shore. What could he have done to save himself had he not been so miserly?

vazelinahS 2021-01-22

A battery with EMF 90.0 V has internal resistance $R_{b} = 8.72$ Ohms.
What is the reading of Vv of a voltometer having totalresstance $R_{v} = 500$ Ohms when it is placed across the terminals ofthe battery?
What is the maximum value that the ratio $\frac{R_{b}}{R_{v}}$ may have if thepercent error in the reading of the EMF of a battery is not toexceed 5.00%?

Efan Halliday 2021-01-19

Please, solve the system of equations: ${\begin{cases} 5 x + y = 14 \\ 2 x + y = 5 \end{cases}$

Dolly Robinson 2021-01-19

$\sqrt{96} = \sqrt{4} \times \sqrt{48}$
$= 2 \times \sqrt{48}$
$= 2 \times \sqrt{8} \times \sqrt{6}$
$= 2 \times 4 \times \sqrt{6}$
$= 8 \sqrt{6}$
Is there a mistake in the simplification? What is it? Correct the mistake if there is one and simplify sqrt96.

Cheyanne Leigh 2021-01-19

Polynomial equation with real coefficients that has roots $- 1, 4 - 2 i i s x^{3} - 7 x^{2} + 12 x + 20 = 0.$

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