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Ksju [112]
3 years ago
6

A teacher stands well back from an outside doorway 0.88 m wide, and blows a whistle of frequency 780 Hz. Ignoring reflections, e

stimate at what angle(s) it is not possible to hear the whistle clearly on the playground outside the doorway.
Physics
1 answer:
AlladinOne [14]3 years ago
5 0

the wavelength is to be 56.67 cm and I know that i should be applying the double slit equation for destructive interference.

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A car with an initial speed of 31.4 km/h accelerates at a uniform rate of 1.2 m/s2 for 1.3 s. What is the displacement of the ca
Kaylis [27]

Answer:

21.5 m

Explanation:

A car has an initial speed of 31.4 km/hr

Convert to m/s

= 31.4 × 1000/3600

= 31,400/3600

= 8.722 m/s

Acceleration = 1.2 m/s^2

Time= 1.3 seconds.

Therefore the displacement can be calculated as follows

S= 8.722 × 1.3 + 1/2 × 1.2 × 1.3^2

= 11.34 + 1/2 × 20.28

= 11.34 + 10.14

= 21.5 m

5 0
3 years ago
What do repeated trails in an experiment allow scientists to do?
fredd [130]

Answer:

Explanation:

When we do multiple trials of the same experiment, we can make sure that our results are consistent and not altered by random events. Multiple trials can be done at one time. If we were testing a new fertilizer, we could test it on lots of individual plants at the same time.

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3 years ago
IS
jarptica [38.1K]

Answer:

5.03

Explanation:

trust me

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