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2 years ago

If an apple is twice as high on a tree, does it experience half the gravity? Why or why not?

Physics

1 answer:

ira [324]2 years ago

3 0

Answer: No

Explanation: because an apple at the top of the twice-as-tall apple tree is not twice as far from earths center

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In the decreasing order of magnitude, which of the following is correct?

Sergio [31]

Answer:

b. Static > sliding > rolling friction.

Explanation:

Static friction is greater than sliding friction. It takes more force to get an object to start sliding than to keep it sliding.

Sliding friction is greater than rolling friction. There are fewer points of contact for a round surface compared to a flat one.

5 0

3 years ago

Help me please!

MrMuchimi

I think it’s A
Good luck

6 0

2 years ago

If a stone with an original velocity was of 0 Is falling from a ledge and takes 8 seconds to hit the ground what is the final ve

Llana [10]

A=(v-u)/t
10=v/8
v=80(unit)

3 0

3 years ago

You and your friend throw balloons filled with water from the roof of a several story apartment house. You simply drop a balloon

ivann1987 [24]

Answer:

74.529 m

Explanation:

t = Time taken

u = Initial velocity

v = Final velocity

s = Displacement

a = Acceleration due to gravity = 9.8 m/s²

For first ball

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=0\times t+\frac{1}{2}\times 9.8\times t^2\\\Rightarrow s=4.9t^2\ m$

For second ball

$s=ut+\frac{1}{2}at^2\\\Rightarrow s=50.96\times (t-2.6)+\frac{1}{2}\times 9.8\times (t-2.6)^2\\\Rightarrow s=25.48t-99.372+4.9t^2$

As the displacement is equal

$25.48t-99.372+4.9t^2=4.9t^2\\\Rightarrow t=\frac{99.372}{25.48}\\\Rightarrow t=3.9\ s$

$s=4.9\times 3.9^2=74.529\ m$

So, height of the building is 74.529 m

3 0

3 years ago

The sound intensity at a distance of 19 m from a noisy generator is measured to be 0.24 W/m2. What is the sound intensity at a d

34kurt

Answer:

0.1111 W/m²

Explanation:

If all other parameters are constant, sound intensity is inversely proportional to the square of the distance of the sound. That is,

I ∝ (1/r²)

I = k/r²

Since k can be the constant of proportionality. k = Ir²

We can write this relation as

I₁ × r₁² = I₂ × r₂²

I₁ = 0.25 W/m²

r₁ = 16 m

I₂ = ?

r₂ = 24 m

0.25 × 16² = I₂ × 24²

I₂ = (0.25 × 16²)/24²

I₂ = 0.1111 W/m²

3 0

2 years ago