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kondaur [170]
3 years ago
7

What is heart sound?

Physics
2 answers:
Dafna11 [192]3 years ago
6 0

Answer:

its the sound that a heart produces when beating, this can help doctors detect abnormalities

andriy [413]3 years ago
4 0

Answer:

dub dub

Explanation:

The “ lub” is the first heart sound, commonly termed S1, and is caused by turbulence caused by the closure of mitral and tricuspid valves at the start of systole. The second sound,” dub” or S2, is caused by the closure of aortic and pulmonic valves, marking the end of systole.

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Two particles, each of mass 7.0 kg, are a distance 3.0 m apart. To bring a third particle, with mass 21 kg, from far away to a r
garri49 [273]

Answer: the external agent must do work equal to -1.3 × 10⁻⁸ J

Explanation:

Given that;

Mass M1 = 7.0 kg

r = 3.0/2 m = 1.5 m

Mass M2 = 21 kg

we know that G = 6.67 × 10⁻¹¹ N.m²/kg²

work done by an external agent W = -2GM2M1 / r

so we substitute

W = (-2 × 6.67 × 10⁻¹¹ × 21 × 7) / 1.5

W = -1.96098 × 10⁻⁸ / 1.5

W = -1.3 × 10⁻⁸ J

Therefore the external agent must do work equal to -1.3 × 10⁻⁸ J

8 0
3 years ago
Series circuit when you had one bulb and battery voltage was at 9 volts, what was current into battery?
KengaRu [80]

Answer:

incomplete question, resistor must be there

Explanation:

7 0
3 years ago
1. Water boils at 100°C at sea level. If the water in this experiment did not boil at 100°C, what could be the reason?
umka2103 [35]

Answer:

It may not be at the sea level

Explanation:

The reason here is water only boils at sea level. This means that if you move water to a different height, say top of a mountain, the boiling temperature of water would change. This is due to the pressure drop at high place. The drop of pressure would make it harder to transform water liquid to gas, thus requiring more temperature.

8 0
3 years ago
Read 2 more answers
Does light have to have a medium to pass through?
skad [1K]

Answer:

Light does not require any medium to travel because light is a transverse wave

hope it helps

7 0
2 years ago
One end of spring is attached to a wall. The other end is attached to a movable block. If you pull the block so as to stretch th
IRINA_888 [86]

Answer: Positive

Explanation:

6 0
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