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shtirl [24]
4 years ago
11

A student visits the beach and wants to explore how landforms, such as sand dunes, are the result of changes caused by wind. wha

t is the best tool to use while observing these changes?
A Graduated cylinder
B Hand lens
C Camera
D Microscope
Physics
2 answers:
ella [17]4 years ago
7 0
Camera because it would be helpful to photograph the dunes at different times and compare the differences resulting from wind.
posledela4 years ago
3 0
C Camera. I think this because you can make timelapses with cameras which makes it easy to see.
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Por una espira de 0.5 m2 de área circula una corriente de 5 A. Calcula la densi- dad de flujo magnético B considerando que la es
Sloan [31]

Answer:

\beta=B=8.05\mu T

Explanation:

The density of the magnetic flux is given by the following formula:

\beta=\frac{\Phi_B}{A}=\frac{ABcos\theta}{A}=Bcos\theta

The normal vector A and the vector of the magnitude of the magnetic field are perpendicular, then, the angle is zero:

The magnitude of the magnetic field is calculated by using the formula for B at a distance of x to a point in the plane of the loop:

B=\frac{\mu_oIR^2}{2(x^2+R^2)^{3/2}}

For x = 0 you have:

B=\frac{\mu_oIR^2}{2R^3}=\frac{\mu_oI}{2R}

R is the radius of the circular loop and its values is:

R=\sqrt{\frac{A}{\pi}}=\sqrt{\frac{0.5m^2}{\pi}}=0.39m

Then, you replace in the equation for B with mu_o = 4\pi*10^-7 T/A:

B=\frac{(4\pi*10^{-7}T/A)(5A)}{2(0.39m)}=8.05*10^{-6}T=8.05\mu T

and the density of the magnetic flux is

\beta=B=8.05\mu T

4 0
4 years ago
There are two unitless vectors:
Hunter-Best [27]

Answer:

200.38^0

Explanation:

Given the forces:

F1 = 8.92 i + 17.37 j

F2 = 8.31 i - 10.97 j

If a third vector is added to them such that they add up to to the null vector as F1 + F2 + F3 = 0

then to get F3:

F3 = -F2-F1

F3 = -(8.31 i - 10.97 j)-(8.92 i + 17.37 j )

F3 = -8.31 i + 10.97 j-8.92 i - 17.37 j

F3 = -8.31i-8.92i+10.97j-17.37j

F3 = -17.23i-6.4j

from the vector:

x = -17.23 and y = -6.4

angle of the third vector with respect to the +x-axis is expressed as:

\theta = tan^{-1}\frac{y}{x}\\ \theta = tan^{-1}\frac{-6.4}{-17.23}\\\theta = tan^{-1}0.3715\\\theta = 20.38^0

Hence the angle the vector makes with the x axis will be \theta = 180+20.38 = 200.38^0

4 0
4 years ago
Both speed and velocity measure how fast something is moving. However, since speed is not a _________ it does not require a(n) _
Jet001 [13]

Both speed and velocity measure how fast something is moving. Hence, since speed is not a vector it does not require direction.

Speed only depends on the distance covered by the object and how much time it took to cover that distance. It does not care about the direction, it just depend on the length of the entire path covered. Whereas, velocity depends on magnitude as well as the direction of the object's motion for example: When an airplane is traveling, It is better to deal the motion with velocity and when we are moving in a car inside the city, we should deal the motion with speed.  

3 0
4 years ago
An organ pipe is open at both ends. It is producing sound
ozzi

To solve this problem we will apply the concepts related to the wavelength of its third harmonic.

It describes that the wavelength is equivalent to

\lambda = \frac{2}{3}L

Here,

\lambda = Wavelength

The wavelength is in turn described as a function that depends on the change of the speed as a function of the frequency, that is to say

\lambda = \frac{v}{f}

In this case the speed is equivalent to the speed of sound and the frequency was previously given, therefore

\lambda = \frac{343}{262}

\lambda = 1.3091m

Finally the length of the pipe would be

L= \frac{3}{2}(1.3091)

L = 1.963m

3 0
3 years ago
Newton’s second law of motion says when a is applied to a it causes it to.
n200080 [17]

Answer:

When force is applied to an object it causes to to accelerate.

Explanation:

7 0
3 years ago
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