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tekilochka [14]
3 years ago
15

Question 3. AP PHYSICS. Currently learning about torque so I assume you apply torque. I don't get it at all

Physics
1 answer:
8090 [49]3 years ago
8 0

wow that is confusing


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Which of the following is not a velocity?*
ira [324]

Answer:

50 mph

Explanation:

doesn’t have direction

3 0
3 years ago
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Two children hang by their hands from the same tree branch. The branch is straight, and grows out from the tree trunk at an angl
vazorg [7]

Answer:879.29 N-m

Explanation:

Given

mass of first child m_1=44 kg

distance of first child from tree is r_1=1 m

tree is inclined at an angle of \theta =27^{\circ}

mass of second child m_1=27 kg

distance of second child from tree is r_2=2.1 m

Weight of first child=m_1g=431.2 kg

Weight of second child=m_2g=264.6 kg

Torque of first child weight=m_1g\cos \theta \cdot r_1

T_1=44\times 9.8\times \cos 27\times 1=384.202 N-m

Torque of second child weight=m_2g\cos \theta \cdot r_2

T_2=27\times 9.8\times \cos 27\times 2.1=495.096 N-m

Net torque T_{net}=T_1+T_2=384.202+495.096=879.29 N-m

6 0
3 years ago
Which of the following is a likely life cycle of a star?
melomori [17]

Answer:

D.

Explanation:

But this just happen for big stars, like more than 20x the Sun mass.

Shortly: A nebula is a cloud of gas and dust, the material starts to be acummuleted and became a protostar (is like a big planet, almost  a star). With enought mass this is a star, burn hydrogen and transform it in Helium.

This occurs in Main Sequence, is about almost all the life time of a star. Then starts the lack of hydrogen. Gravity compress everything, pressure goes up and heat all. Too much energy, Helium get burned and the star grews fast, became a Red Giant. Time pass and the fuel is over, no more making fusion, gravity compress the star, too much strenght, colapses, neutron star.

If it have pretty mass, ok. If have more than like 2x Sun mass, became a blackhole.

7 0
3 years ago
A cork shoots out of a champagne bottle at an angle of 40.0 above the horizontal. If the cork travels a horizontal distance of 1
ruslelena [56]

Answer:

The initial speed of the cork was 1.57 m/s.

Explanation:

Hi there!

The equation of the horizontal position of the cork in function of time is the following:

x = x0 + v0 · t · cos θ

Where:

x = horizontal position at time t.

x0 = initial horizontal position.

v0 = initial speed of the cork.

t = time.

θ = launching angle.

If we place the origin of the frame of reference at the launching point, then x0 = 0.

We know that at t = 1.25 s, x = 1.50 m. We also know the launching angle so we can solve the equation of horizontal position for the initial speed, v0:

x = v0 · t · cos θ

x / t · cos θ = v0

v0 = 1.50 m / (1.25 s · cos (40.0°)

v0 = 1.57 m/s

The initial speed of the cork was 1.57 m/s.

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3 years ago
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Please help me with this 29 points
Irina18 [472]

Answer:

)Give the definition of poverty line as defined by the World Bank.

7 0
3 years ago
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