A rocket, blasting into space, accelerates at 2 m/s^2 for 20 seconds. What is its speed at the end of 20 seconds?

Physics

1 answer:

OLEGan [10]3 years ago

4 0

Answer:

Acceleration = (change in speed) / (time for the change)

Change in speed = (ending speed) - (beginning speed)

= (3,600 mi/hr) - ( 0 )

= 3,600 mi/hr

= same as 1 mile/second.

Acceleration = (1 mi/sec) / (10 sec)

= 0.1 mi/sec² .

But 1 mile = 5,280 ft,

0.1 mi/s² = 528 ft/s²

Explanation:

have a great day

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The maximum wavelength that an electromagnetic wave can have and still eject electrons from a metal surface is 542 nm. What is t

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Answer:

2.295 eV

Explanation:

maximum wavelength, λ = 542 nm = 542 x 10^-9 m

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$W_{o}=\frac{hc}{\lambda }$