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Masteriza [31]
3 years ago
5

A car is traveling at a constant speed of 20 m/s for 3 seconds. Then the driver puts on the brakes. The total distance the car t

ravels is 100 m. What is the total time the car was moving?
Physics
1 answer:
yarga [219]3 years ago
3 0

Answer:

15 seconds

Explanation:

If car was moving at 20m/s for 3 sec.

if car traveled 100m = 15 sec total

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What is the wavelength of an X-ray photon with energy 8.0 keV (8000 eV)? (1 eV = 1.60 × 10−19 joule.)
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Answer:

Wavelength = 0.15 nm

Frequency = 1939.3939\times 10^{15}Hz

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We have given photon energy E = 8 KeV = 8000 eV

In question it is given that 1eV=1.6\times 10^{-19}J

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We know that photon energy is given by E=h\nu

So 12800\times 10^{-19}=6.6\times 10^{-34}\nu

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4 years ago
If you get a job that pays $12 per hour and work 35 hours a week, how much will you make in a year?
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$21,840

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