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Brut [27]
4 years ago
10

A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to Upper P 89​, the

89 th percentile. This is the temperature reading separating the bottom 89 % from the top 11 %.

Physics
1 answer:
andrew11 [14]4 years ago
8 0

Answer:

X_{1}=1.23

Explanation:

Given :

μ = 0

σ = 1

For 89th percentile

using invariant norm ( area, μ, σ )

       = inv. norm ( 0.89, 0, 1 )

       = 1.23

or

P ( x > X_{1} ) = 0.89

P\left ( \frac{X-N}{\sigma } >\frac{X_{1}-0}{1}\right )=0.89

P\left ( Z>Z_{1} )=0.89

Now using Normal table, Z = 1.23

Therefore, \frac{X_{1}-0}{1}=1.23

X_{1}=1.23

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Readme [11.4K]

Answer: 55 ohms

Explanation:

Given that,

Voltage of heater (v) = 110-volt

Current drawn by heater (I) = 2.0 amperes

resistance of the heater (r) = ?

Since voltage, current and resistance are involved, apply the formula for ohms law.

Voltage = current x resistance

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where r = v / i

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Thus, the resistance of the heater is 55 ohms

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Explanation:

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\vec{F}=q\vec{v} \ X\ \vec{B}       (1)

q: charge of the electron = -1.6*10^-19C

B: magnitude of the magnetic field = 0.80T

v: speed of the charge = 3.0*10^5 m/s

The direction of the motion of the electron is in the +i^ direction (+x direction). The magnetic field is in the +^k direction (+z direction).

The cross product between these unit vectors, by taking into account the minus sign of the charge, is given by:

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The magnetic force is in the ^j direction (+y direction).

The magnitude of the magnetic force is:

F=qvB=(1.6*10^{-19}C)(3.0*10^5m/s)(0.80T)=3.84*10^{-34}N

The magnetic force on the electron has a magnitude of 3.84*10^-34N in the +y direction

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