Answer:
The time spent by the rock in air is 3 s.
Explanation:
Given;
initial horizontal velocity of the rock, u = 20 m/s
horizontal distance traveled by rock, R = 60 m
The the range of the projectile is given by;
R = vt
where;
v is the initial horizontal velocity of the rock
t is the time spent by the rock in air
t = R/v
t = 60 / 20
t = 3 s
Therefore, the time spent by the rock in air is 3 s.
Answer:
v ’= - 1.76 10⁻⁴ m / s
Explanation:
We can solve this problem using momentum conservation. Defined a system formed by the patient, his blood and the platform in such a way that the forces are internal and the moment is conserved
initial instnate. Before pumping
p₀ = 0
final instant. Right after the heart pumping
p_f = m v + M v'
where m is the mass of blood and M the mass of the patient + the platform
p₀ = p_f
0 = m v + M v’
v ’= -
let's calculate
v ’= - 0.30
v ’= - 1.76 10⁻⁴ m / s
Hello, Thank you for posting your question here on brainly! feel free to ask as many as needed!
<span> the portion </span>of the electromagnetic spectrum<span> that is </span>visible <span>to the human eye. </span>Electromagnetic radiation<span> in this range of wavelengths is called </span>visible light<span> or simply </span>light<span>. A typical human eye will respond to wavelengths </span>from <span>about 390 to 700 nm.
</span>I hope i helped you.
Answer: -194 mph
Explanation:
Taking into account the <u>Sun as the center </u>(origin, point zero) <u>of the reference system</u>, the velocity of the spacecraft relative to the Sun is:
Note it is <u>positive</u> because the spacecraft is moving <u>away</u> from the Sun
Taking into account the <u>spacecraft as the center of another reference system</u>, the velocity of the asteroid relative to the spacecraft is:
Note it is <u>negative</u> because the asteroid is moving<u> towards</u> the spacracft.
Now, the velocity of the asteroid relative to the Sun is:
Finally:
This is the velocity of the asteroid relative to the Sun and its negative sign indicates it is <u>moving towards the Sun</u>.
Answer:
The only element is A). hydrogen.
Explanation:
I hope this helps.