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andrew11 [14]
3 years ago
15

Two balls, a foam ball and a golf ball, are placed into a pail of water. The golf ball sinks. Why does a foam ball float and a g

olf ball sink when both are placed into water?
Physics
2 answers:
Veseljchak [2.6K]3 years ago
7 0

Answer:

foam is less dense

Explanation:

g100num [7]3 years ago
6 0

Answer:

The golf ball has a greater mass than the foam ball

Explanation:

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A 2.00 kg rock is dropped from the top of a 30.0 m high building. Calculate the ball’s momentum at the time that it strikes the
Darya [45]

Explanation:

We use the Theorem of conservation of mechanical energy for finding the velocity when it strikes the ground:

Ei = Ef

Ki + Ui = Kf + Uf

Ui = Kf

m g h = 1/2 m v^2

v = sqrt(2gh)

So the momentum will be:

p = mv = m * sqrt(2gh)

5 0
3 years ago
the velocity of a sound on a particular day outside is 331 meters/second. what is the frequency of a tone if it has a wavelength
hichkok12 [17]
Wavelength*frequency=velocity
(331m/s)/(.6m)
Frequency = 551.666 1/s
3 0
3 years ago
A car is moving on the distance 35km in the time 30minutes,stays 20 minutes,the it moves again vith the velocite 60km/h in 25 mi
FinnZ [79.3K]
Velocity = distance/time
v = (35)/(1/2)
v = 70 km/h


60 km/h for 25 minutes
25 minutes = 25/60 hour
    distance= velocity * time
d =(60) * (25/60)
d = 25 km

ΔV = { V(initial) - V(final) } / time
v= (70-60) / (45/60)
average velocity = 13.33 km/h
avg veloticy = 3.7 m/s

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8 0
3 years ago
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Nadusha1986 [10]
E = 0.5mv^2 = 0.5*44*10^2 = 2200J
5 0
4 years ago
Read 2 more answers
A(n) 71.1 kg astronaut becomes separated from the shuttle, while on a space walk. She finds herself 70.2 m away from the shuttle
denpristay [2]

Answer:

10.347 minutes.

Explanation:

According to F = ma, she exerts force on camera of the magnitude

F = 0.67Kg*12m/s^{2} = 8.04N, assuming it took her one second to accelerate camera to 12m/s, then by newtons third law, which says every action has equal and opposite reaction , the camera exerts the same amount of force on the astronaut which gives her acceleration of a = \frac{8.04N}{70.2Kg} = 0.1130801680m/s^2.

and velocity of V = 0.1130801680m/s.

at this velocity , the astronaut has to cover the distance of 70.2 meters, it will take her 620.7985075s = 10.347 min to get to the shuttle (using S = vt).

4 0
3 years ago
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