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4 years ago

In a plane mirror, the image is the same size as the object. O A. True B. False

Physics

2 answers:

Sindrei [870]4 years ago

6 0

It is true * if this helped you in anyway please be sure to leave a thanks:)

lisov135 [29]4 years ago

4 0

Answer:

A. true

Explanation:

a plane mirror is the one having angle of incidence equal to angle reflection.

the image appears of the same size as the object.

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Of the numbers 0.0034 m, 45.6 m, and 1234 m, which is the most precise?

julia-pushkina [17]

Answer:

The most precise is 0.0034 m ⇒ 1st answer

Explanation:

Lets revise the meaning of precise

Precision is referred as the closeness of two measurements to one

another.

Highest number with significant digit is the most precise

Ex: Highest significant of optical instrument is the Wavelength of visible (red)

light = 0.00006 cm

Hence the most precise device for measuring length is the given optical

instrument

The difference between accuracy and precise

Accuracy is how close a value is to its true value

Precision is how repeatable a measurement is

We have three numbers

0.0034 m, 45.6 m, and 1234 m

The least precise is 1234 m

The most precise is 0.0034 m

4 0

4 years ago

Read 2 more answers

What is a gram used to measure

11Alexandr11 [23.1K]

Answer:

The gram is the basic unit of measurement

Explanation:

You use it to weigh small items such as sugar, flour, coffee, and other items that are similar.

If you want to measure in grams using a scale is the most accurate solution.

(have a nice day!)

4 0

3 years ago

How long tg does it take for the balls to reach the ground? use 10 m/s2 for the magnitude of the acceleration due to gravity.

erik [133]

Answer:

1.0s

Explanation:

distance = 1/2 × acceleration × time2 + intial speed × time

5 0

3 years ago

A venturi meter is a device for measuring the speed of a fluid within a pipe. The drawing shows a gas flowing at a speed v2 thro

yarga [219]

Answer:

$V_2=6.17\ m/s$

$Q=0.49\ m^3/s$

Explanation:

Given that

$A_1=0.03m^2$

$A_2=0.08m^2$

We know that from continuity equation

$Q=A_1V_1=A_2V_2$

$A_1V_1=A_2V_2$

$0.3V_1=0.08V_2$

$V_1=2.66V_2$

Now from energy equation

$P_1+\dfrac{1}{2}\rho V_1^2=P_2+\dfrac{1}{2}\rho V_2^2$

$P_2-P_1=\dfrac{1}{2}\rho V_1^2-\dfrac{1}{2}\rho V_2^2$

$140=\dfrac{1}{2}\times 1.2\times 7.11\times V_2^2-\dfrac{1}{2}\times 1.2\times V_2^2$

$V_2=6.17\ m/s$

$Q=A_2V_2$

Q=6.17 x 0.08

$Q=0.49\ m^3/s$

7 0

3 years ago

A clothes dryer uses about 5 amps of current from a 240 volt line. How much power does it use?

yan [13]

PVI, so the power used would be 240*5= 1200 Watts.

6 0

3 years ago