3 years ago

X-rays

Physics

1 answer:

Ksenya-84 [330]3 years ago

6 0

Answer:

They all have the characteristic "energy" in common

Explanation:

Energy is power derived from the utilization of physical or chemical resources, especially to provide light / heat or to work machines. X-rays, UV Light Waves, Sound Waves, and Earthquake Waves all have energy.

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Superman ferma in 5,0 ∙10^(-3) s un treno inizialmente in corsa alla velocitá di 216km/h. Qual é l’accelerazione media del treno

kotykmax [81]

Answer:

$1.2*10^4 m/s^2$

Explanation:

The formula to find average acceleration is a=Δv/Δt.

Convert 216 km/hr to m/s

216 km/hr * 1000 m/km * 1 hr/60 mins * 1 min/60 secs = 60 m/s

So a= (60 m/s)/(5.0*10^-3) = 12000 m/s^2

Put that into scientific notation to get 1.2*10^4 m/s^2

6 0

3 years ago

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Lerok [7]

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3 years ago

An escalator is 18.3 m long. If a person stands on the escalator, it takes 47.8 s to ride from the bottom to the top. If a perso

Novay_Z [31]

Answer:

20.243 s

Explanation:

Because the escalator and person moving in the same direction, relative velocity can be calculated by summing the velocity of the escalator and velocity of the person.

The speed of escalator can be calculated as,

$v_{escalator}=\frac{x}{t}=\frac{18.3}{47.8}=0.383\ m/s$