subject

Physics, 24.04.2021 05:10 xgibson123

Why does a barcode scanner need electromagnetic waves to work

ansver

Answers: 1

Show answers

Another question on Physics

question

Physics, 22.06.2019 00:00

Jackson is designing a new heater, and he wants to experiment with different thermally conductive materials. which of these materials would be useful in conducting heat?

Answers: 1

question

Physics, 22.06.2019 00:30

Using the work energy theorem. what is the velocity of a 850kg car after starting at rest when 13,000j of work is done to it.

Answers: 1

question

Physics, 22.06.2019 04:00

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Answers: 3

question

Physics, 22.06.2019 07:30

The charge on a charged sphere is: a)concentrated at its centerb)distributed uniformly throughout its volumec)clustered on its centerd)distributed uniformly over its surface

Answers: 1

You know the right answer?

Why does a barcode scanner need electromagnetic waves to work...

Questions

question

Mathematics, 19.01.2020 20:31

Which shows 532 − 472 being evaluated using the difference of squares method? 532 − 472 = 2809 − 2209 = 600 532 − 472 = (53 + 47)(53 − 47) = (100)(6)...

question

English, 19.01.2020 20:31

Which of the following questions should you ask yourself when analyzing word choice? a. what details appear in the text? b. what information is bein...

question

History, 19.01.2020 20:31

What events caused the unification of italy? explain what happened...

question

Mathematics, 19.01.2020 20:31

Given f(x)=x+2 and h(x)=1/x-1 evaluate the following function at x=2 [h(x)]^2/f(x)...

question

Mathematics, 19.01.2020 20:31

Joanne works two jobs to pay for college. she tutors for $25 per hour and also works as a receptionist for $12 per hour. due to her class and study sc...

question

Mathematics, 19.01.2020 20:31

Ashoe box measures 15 in. by 7 in. by 41/2 in. what is the surface area of the box?...

question

Mathematics, 19.01.2020 20:31

Solve for f. f+0.2=−3f+0.2=−3 f=−3.2f=−3.2 f=−2.8f=−2.8 f = 2.8 f = 3.2...

question

Biology, 19.01.2020 20:31

Which hypothesis states that the moon originally broke away from earth during its early formation? a. fission hypothesis b. accret...

question

Biology, 19.01.2020 20:31

How an area can be both a wetland an estuary...

question

Social Studies, 19.01.2020 20:31

What is the current index rate, based on the current quarter and rate?...

question

English, 19.01.2020 20:31

Ais a story written by a playwright to be a performed by actors. a. drama b. novel c. poem d. soliloquy...

question

History, 19.01.2020 20:31

What was one of the events that led to u. s. involvement in wwi?...

question

Mathematics, 19.01.2020 20:31

If mary walks 3 feet every 2 seconds, how many feet does she walk in an hour?...

question

Biology, 19.01.2020 20:31

Which microscope would be most useful for examining the contours of the surface of a bacteria cell?...

question

Mathematics, 19.01.2020 20:31

Randy filled out a deposit slip today. he deposited two checks for $123.17 and $34.68 and took out $50 in cash...

question

Chemistry, 19.01.2020 20:31

Increasing energy if particles in motion?...

question

Mathematics, 19.01.2020 20:31

Jenny reads 5/8 page in2/3 minute...

question

Mathematics, 19.01.2020 20:31

Kai ties 8 bows. laura ties 13 bows. how many more bows does laura tie than kai?...

question

Mathematics, 19.01.2020 20:31

Abag contains 12 red checkers and 6 black checkers. you will randomly select two checkers, one at a time, without replacement. fill in the...

question

English, 19.01.2020 20:31

Where is the verb in this sentence. earh has salty sea water and fresh water....

More questions: Physics Another questions

Questions on the website: 13722363