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MakcuM [25]
3 years ago
14

What real world examples show no work being done? Can you think of examples other than resisting the forces of gravity?

Physics
2 answers:
vlabodo [156]3 years ago
8 0
Moving dumblees up and down
Lesechka [4]3 years ago
7 0
I need more info man then i can help you. 
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Afootball of mass 550g is at rest on the ground the football is kicked with a force of 108 newton the footballers boot is in con
d1i1m1o1n [39]

If "0.3 minute" is correct, then it's 9,543,272 Joules.

If it's supposed to say "0.3 SECOND", then the KE is 2,651 Joules.

6 0
3 years ago
You want to photograph a circular diffraction pattern whose central maximum has a diameter of 1.0 cm. You have a helium-neon las
topjm [15]

Answer:

0.776 m far Pinhole should be placed before the viewing screen

Explanation:

For circular aperture of diameter D will have a bright central maximum of diameter, width is given by

w=\frac{2.44 \lambda L}{D}

where \lambda is wavelength of helium neon laser = 633 nm, D=10.cm, w=0.12 mm

Pinhole should be placed before the viewing screen is

L=\frac{wD}{2.44\lambda}\\L=\frac{0.12\times 10^{-3}\times 0 .01}{2.44\times 633 \times 10^{-9}}\\L=0.776 m

4 0
3 years ago
An atom contains 15 neutrons and has a mass number of 30. What is its atomic number? How did you determine the atomic number?
irinina [24]

Answer:

15

Explanation:

The mass number is defined as the total number of protons and neutrons. The atomic number is total number of protons. And since we have the mass number and number of neutrons, we can use simple subtraction (30 - 15) to find that the atomic number is 15.

8 0
4 years ago
Which of the following is equivalent to 2,100 grams
irina1246 [14]
74.07532 ounces are equivelant to 2100 grams
7 0
3 years ago
Read 2 more answers
Two ways that radio waves are used for transmitting information. Help me please.
Travka [436]
1. Stop transmitting start and stop sending photons. This is typical morse code like transmissions of information. By varying the pattern of starts stops you vary the information sent. Also used in digital communications over radios, modems, and pulse dialing over radio/phones. 

<span>2. Change the frequency. You use a pattern of shorter and longer wavelengths of radio waves higher and lower energies of individual photons to transmit information. This is frequency modulation </span>
3 0
3 years ago
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