Physics, 18.01.2020 03:31 tbenjamin1299
Part 1 - basic equations
the basic equation connecting wave speed v, wavelength ? and frequency f is
v = f?
the wave speed in a stretched string depends on the string's tension t and mass per unit length ? (also called the "linear mass density") with the equation
v =
sqrt1a. gif t/?
1. if the string's length is l, what is the fundamental wavelength ? 1?
(i already got this answer, it is 2l)
2. derive a formula for the speed of the wave in terms of the fundamental frequency f1 and the string length l.
v=
3. derive a formula for linear mass density ? in terms of the wave speed v and string tension t.
? =
assume you have the following intermediate (i. e., significant figures may be incorrectly stated) experimental results :
l = 0.812 ? 0.019 m
f1 = 29.02 ? 1.45 hz
t = 5.08 n (exact)
4. what is the linear mass density of the string (without uncertainty, units requred)?
? =
5. use the above results to calculate the fractional uncertainty in the wave speed ? v:
6. use the above results to calculate the fractional uncertainty in the linear mass density ? ? :
7. then calculate the absolute uncertainty in the linear mass density ? ? :
8. finally, state the linear mass density with its uncertainty using correct significant figures (include units):
Answers: 3
Physics, 22.06.2019 00:30, sophiaa23
Next a skier is pulled by a tow rope up a frictionless ski slope that makes an angle of 15 with the horizontal. the rope moves parallel to the slope with a constant speed of 0.69 m/s. the force of the rope does 800 3 of work on the skier as the skier moves a distance of 8.4 m up the incline. (a) if the rope moved with a constant speed of 2.2 m/s how much work would the force of the rope do on the skier as the skler moved a distance of 8.4 m up the incline? at what rate is the force of the rope doing work on the skier when the rope moves with a speed of (b) 0.69 m/s and (c) 2.2 m/s?
Answers: 1
Physics, 22.06.2019 16:30, CadenSkinner2003
Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.
Answers: 1
Physics, 22.06.2019 16:30, belle5828
3. a lunar exploration vehicle was created by a research team. it weighs 3,000 kg on the earth. it needs an acceleration of 10 m/s2 on the moon. in order to have the same acceleration, what will be the net force acting on the vehicle on the earth?
Answers: 2
Part 1 - basic equations
the basic equation connecting wave speed v, wavelength ? and...
the basic equation connecting wave speed v, wavelength ? and...
Health, 24.08.2019 01:50
Mathematics, 24.08.2019 01:50
Mathematics, 24.08.2019 01:50
History, 24.08.2019 01:50
Social Studies, 24.08.2019 01:50
History, 24.08.2019 01:50