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DaniilM [7]
3 years ago
15

When aluminum foil is formed into a loose ball, it can float on water. But when the ball of foil is pounded flat with a hammer,

the foil sinks. why?
Physics
1 answer:
docker41 [41]3 years ago
8 0
Air caught in the ball of foil makes the ball less dense than water
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A cell phone weighing 80 grams is flying through the air at 15 m/s what is the kinetic energy
hjlf

Answer:

9\:\mathrm{J}

Explanation:

Kinetic energy is given by the following equation:

KE=\frac{1}{2}mv^2, where m is mass in \mathrm{kg} and v is velocity in \mathrm{m/s}.

Since the cell phone's mass is given in grams, we need to convert this into kilograms:

80\:\mathrm{g}\cdot \frac{1\:\mathrm{kg}}{1000\:\mathrm{g}}=0.08\:\mathrm{kg}.

Therefore, the kinetic energy of the cell phone is:

KE=\frac{1}{2}\cdot 0.08\cdot 15^2=\fbox{$9\:\mathrm{J}$}.

3 0
3 years ago
Why do storm go to Galveston?​
notsponge [240]

Hurricanes and tropical storms can also spawn tornadoes and microbursts, create storm surges ... If you are unable to evacuate, go to your wind-safe room.

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4 years ago
The range is the horizontal distance from the cannon when the pumpkin hits the ground. This distance is given by the product of
jarptica [38.1K]

The answer is 45 degrees.  I am not doing a field experiment for you that involves a cannon and a day's work, for 5 points.

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3 years ago
Why can objects be made to float in a magnetic field?
dimulka [17.4K]
I would say that the answer is C
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3 years ago
A falling 0.60 kg object experiences a frictional force due to air resistance of 1.5 N. What is the object's acceleration?​
STatiana [176]

Answer:

7.5 m/s².

Explanation:

From the question given above, the following data were:

Mass (m) of object = 0.6 Kg

Force of friction (Fբ) = 1.5 N

Acceleration (a) =?

Next, we shall determine the force of gravity on the object. This can be obtained as follow:

Mass (m) of object = 0.6 Kg

Acceleration due to gravity (g) = 10 m/s²

Force of gravity (F₉) =?

F₉ = mg

F₉ = 0.6 × 10

F₉ = 6 N

Next, we shall determine the net force acting on the object. This can be obtained as follow:

Force of friction (Fբ) = 1.5 N

Force of gravity (F₉) = 6 N

Net force (Fₙ) =?

Fₙ = F₉ – Fբ

Fₙ = 6 – 1.5

Fₙ = 4.5 N

Finally, we shall determine the acceleration of the object. This can be obtained as follow:

Mass (m) of object = 0.6 Kg

Net force (Fₙ) = 4.5 N

Acceleration (a) of object =?

Fₙ = ma

4.5 = 0.6 × a

Divide both side by 0.6

a = 4.5 / 0.6

a = 7.5 m/s²

Therefore, the acceleration of the object is 7.5 m/s²

8 0
3 years ago
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