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4 years ago

What is the frequency of a pendulum that is moving at 30 m/s with a wavelength of .35m?

Physics

1 answer:

tia_tia [17]4 years ago

5 0

Answer:

Velocity (v) = 30 m/s

Wavelength = 35 m

frequency (f) = ?

now we know

v = wavelength * f

30 = 35 * f

therefore frequency = 0.857hertz

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The y component of a vector R of magnitude k = Bcm shown in the figure below is Ky = +6 cm. What is the direction of this vector

WARRIOR [948]

Given

The y-component of vector K is

$K_y=6\text{ cm}$

The magnitude of vector K is , K=8 cm

To find

The angle

$\theta$

Explanation

Resolving K along its y-component we have,

$\begin{gathered} K_y=Ksin\theta \\ \Rightarrow6=8sin\theta \\ \Rightarrow sin\theta=\frac{3}{4} \\ \Rightarrow\theta=48.59\text{ }^o \end{gathered}$

Conclusion

The angle made with the x-axis is

$48.59^o$

6 0

1 year ago

What is the energy of motion.

AlladinOne [14]

Answer:

Is the sum of potential and kinetic energy in an object that is used to do work.

4 0

3 years ago

Read 2 more answers

A person on a cruise ship is doing laps on the promenade deck. On one portion of the track the person is moving north with a spe

Aleksandr-060686 [28]

The direction of motion of the person relative to the water is 16.7° north of east.

Why?

We can solve the problem by applying the Pitagorean Theorem, where the first speed (to the north) and the second speed (to the east) corresponds to two legs of the right triangle formed with them. (north and east directions are perpendicular each other)

We can calculate the angle that give the direction using the following formula:

$Tan(\alpha)=\frac{NorthSpeed}{EastSpeed}\\\\Tan(\alpha)^{-1}=Tan(\frac{NorthSpeed}{EastSpeed})^{-1}\\\\\alpha=Tan(\frac{NorthSpeed}{EastSpeed})^{-1}$

Now, substituting the given information we have:

$alpha=Tan(\frac{NorthSpeed}{EastSpeed})^{-1}$

$\alpha =Tan(\frac{3.6\frac{m}{s} }{12\frac{m}{s} })^{-1}\\\\\alpha =Tan(0.3)^{-1}=16.69\°(North-East)=16.7\°(North-East)$

Hence, we have that the direction of motion of the person relative to the water is 16.7° north of east.

Have a nice day!

7 0

3 years ago

During the first 50 s a truck traveled at constant speed of 25 m/s. Find the distance that it is traveled.

Allushta [10]

Time=50s
speed=25m/s

Distance = speed×time
=25×50
=1250m

DISTANCE TRAVELLED IS =1250m

6 0

3 years ago

Nonmetals in the periodic table have a negative oxidation number. Which statement best explains why?

Tema [17]

They have a negative oxidation number because nonmetals gain electrons, thus making them negatively charged ions (anions). Metals become cations and have a positive charge because they lose electrons.

7 0

3 years ago