3 years ago

6. A billiard ball traveling at 4.0 m/s has an elastic head-on collision with a billiard ball of equal mass

Physics

1 answer:

Yakvenalex [24]3 years ago

7 0

Answer is C‼️.......................

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A train is traveling away from you at 120 km/h. it blows its whistle, and you hear a tone of 0.400 kHz. Take the speed of sound

Vaselesa [24]

Answer:B)439.21 Hz

Explanation:

Given

velocity of train $v=120 km/h\approx 120\times \frac{5}{18}=33.33 m/s$

frequency of train $f_a=0.400 kHz\approx 400 Hz$

speed of sound $c=340 m/s$

frequency from Doppler effect can be calculated by

$f_a=(\frac{c}{c+v})\cdot f$

$400=(\frac{340}{340+33.33})\cdot f$

$400=\frac{340}{373.33}\cdot f$

$f=400\times 1.098$

$f=439.21 Hz$

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3 years ago

Acceleration can be best described as:

zhuklara [117]

Answer:

The ability to speed up

Explanation:

Speed up since the motion is rising , thats acceleration

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4 years ago

An force of 50 N is applied to a shovel, which acts as a lever to

Levart [38]

Answer:

the answer is 18

Explanation:

900/50=18

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3 years ago

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How long will a plane have to fly continuously with 900 miles per hour in order to cover the same distance as that from Earth to

hammer [34]

I'm not sure about the distance to the nearest star, but it's probably about 4 light-years (L-y).

1 L-y = 1.86 * 10E5 mi/sec * 3600 sec/hr * 24 hr/day * 365 day/yr

1 L-y = 5.9 *10E12 mi and 4 L-y = 2.3 *10E13 mi distance to star

2.3 * 10E13 mi / 900 mi/hr = 2.6 * 10E10 hr hours to star

2.6 * 10E10 hr / (24 hr/day) = 1.1 * 10E9 day days to star

1.1 * 10E9 day / 365 day/yr = 3 * 10E6 yr = 3 million years to star

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3 years ago

An 8.0-v power supply delivers a 1.75-a current to a circuit. calculate the power provided to the circuit.

kicyunya [14]

P=IV
Power=8.0x1.75 =14W

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4 years ago