All categories

4 years ago

Which statement might be correct based on dimensional analysis?

Physics

1 answer:

ss7ja [257]4 years ago

8 0

Answer:

none

Explanation:

a. the unit of height does not carry a square( m^2 is unit of area)

b. time cannot be in m/s. it is unit of speed

c. m/s^2 are the units of acceleration

You might be interested in

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

A DC current of 60 mA can cause paralysis of the body's respiratory muscles and hence interfere with breathing, but only 15 mA (

Liula [17]

To solve this problem it is necessary to apply the concepts related to Ohm's Law to find the voltage in the case of direct current. While for the Alternate current we use the concept of RMS voltage.

PART A) In the case of DC we have to,

V=IR

Where,

I = Current

R = Resistance

Where the current is 60mA y the resistance is $1000\Omega$ , then the potential would be

$V=(60mA)(1100\Omega)$

$V = 66V$

In the case of DC we have that the current and the RMS voltage is,

$I_{rms} = 15 mA$

$R = 1100 \Omega$

$V_{rms} = 16.5 V$

The potential in AC then is,

$V_o = \sqrt{2}V_{rms}$

$V_o = \sqrt{2}(16.5)$

$V_o = 23.3345 V$

3 0

3 years ago

Arysha enjoys playing lacrosse on the school team. Suppose Arysha throws a lacrosse ball with a force of 6 N, and the resulting

olasank [31]

Answer:

$Mass = 0.14kg$

Explanation:

Given

$Force = 6N$

$Acceleration = 43m/s^2$

Required

Determine the mass of the ball

This question will be answered using Newton's second law of motion.

Which states that

$Force = Mass * Acceleration$

Substitute values for Force and Acceleration

$6N = Mass * 43m/s^2$

Make Mass the subject

$Mass = \frac{6N}{43m/s^2}$

$Mass = 0.13953488372$

$Mass = 0.14kg$ --- (approximated)

3 0

3 years ago

These steps are followed when using the half-life of carbon-14 to determine the age of an object that contains carbon. what is t

allsm [11]

The Answer to this question is C

4 0

3 years ago

Read 2 more answers

All of the following are examples of positive direction except:

charle [14.2K]

Answer:

right

Explanation:

think of a compass theres N.E.S.W north, east, south, west

8 0

3 years ago