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Lera25 [3.4K]
3 years ago
8

Convection currents in air and water occur because _

Physics
1 answer:
Diano4ka-milaya [45]3 years ago
7 0

warm fluids are less dense than cold fluids

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What beat frequencies result if a piano hammer hits three strings that emit frequencies of 392.0, 587.3, and 146.8 hz? (enter yo
FinnZ [79.3K]
128.1-127.8= 0.3Hz 
<span>129.1-128.1= 1.0Hz </span>
<span>129.1-127.8= 1.3Hz</span>
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A student drops a ball from the top of a 10-meter tall building. The ball leaves the thrower's hand with a zero speed. What is t
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Answer:

14 m/s

Explanation:

u = 0, h = 10 m, g = 9.8 m/s^2

Use third equation of motion

v^2 = u^2 + 2 g h

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v^2 = 0 + 2 x 9.8 x 10

v^2 = 196

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10. A child drops a ball from a window. The ball strikes the ground in 3.0 seconds. What is the velocity of the ball the instant
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The velocity of the ball is 30.0 m/s.
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3 years ago
Separating the electron from the proton in a hydrogen atom takes 2.18 ✕ 10−18 j of work. through what electric potential differe
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Electric potential = work done/charge of electron = 2.18×10⁻¹⁸/1.6×10⁻¹⁹
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Little Timmy wants to measure how tall his house is. He doesn’t have a tape measure but does have a stopwatch. He recruits Big B
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The distance covered by an object accelerating from rest is

D = (1/2) · (acceleration) · (time)² .

In this particular case, 'acceleration' is 9.8 m/s² ... due to gravity.

D = (1/2) · (9.8 m/s²) · (1.67 s)²

D = (4.9 m/s²) · (2.789 s²)

D =  13.67 meters

6 0
3 years ago
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