3 years ago

Which statement is true about the image produced by a plane mirror?

Physics

1 answer:

aalyn [17]3 years ago

5 0

Answer:

B. It appears to have reversed left and right, relative to the object

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What determines whether a charged object gains or loses electrons

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Simple: if a charge is positive, it loses electrons. If negative, it gains.

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Global positioning satellites (GPS) can be used to determine your position with great accuracy. If one of the satellites is 20,0

o-na [289]

Answer:

0.00001 %

Explanation:

The distance from satellite = 20000 km

Position range = 2 m

The percentage uncertainty is given by dividing the distance from satellite by the position range of desired accuracy.

Percentage uncertainty is given by

$\dfrac{2}{20000\times 10^3}\times 100=0.00001\ \%$

The percentage uncertainty that is required is 0.00001 %

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4 years ago

Express the measurement 0.00000575 into scientific notation.

g100num [7]

Answer: = 5.75 × 10 -6

Explanation:

= 5.75 × 10-6

(scientific notation)

= 5.75e-6

(scientific e notation)

= 5.75 × 10-6

(engineering notation)

(millionth; prefix micro- (u))

= 0.00000575

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3 years ago

If the observed test value of a hypothesis test is outside of the established critical value(s), a researcher would __________.

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I just had this question, the awnser is A.

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An 800-kHz radio signal is detected at a point 4.5 km distant from a transmitter tower. The electric field amplitude of the sign

saul85 [17]

Answer:

$2.1\times 10^{-9} T$

Explanation:

We are given that

Frequency,f=800KHz= $800\times 10^{3} Hz$

$1kHz=10^{3} Hz$

Distance,d=4.5 km= $4.5\times 10^{3} m$

1 km=1000 m

Electric field,E=0.63V/m

We have to find the magnetic field amplitude of the signal at that point.

$c=3\times 10^8 m/s$

We know that

$B=\frac{E}{c}$

$B=\frac{0.63}{3\times 10^8}=0.21\times 10^{-8} T$

$B=2.1\times 10^{-9} T$

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4 years ago