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nignag [31]
3 years ago
14

Can someone answer these two questions? thanks

Physics
1 answer:
irakobra [83]3 years ago
4 0
Number 1 is A. I’m not sure about number 2 but I think it’s B
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You are on a train that is traveling at 3.0 m/s along a level straight track. Very near and parallel to the track is a wall that
loris [4]

Questions Diagram is attached below

Answer:

T=2.08s

Explanation:

From the question we are told that:

Speed of Train V=3.0m.s

Angle \theta=12\textdegree

Height of window h_w=0.90m

Width of window w_w=2.0m

The Horizontal distance between B and A from Trigonometric Laws is mathematically given by

 b=\frac{0.9}{tan12}

 b=4.23

Therefore

Distance from A-A

 d_a=2.0+4.23

 d_a=6.23

Therefore

Time Required to travel trough d is mathematically given as

 T=\frac{d_a}{v}

 T=\frac{6.23}{3}

 T=2.08s

5 0
3 years ago
Fertility is
Helga [31]
Fertility is the biological capacity to bear children. 

None of the other answers come close to being true. When we're talking about fertility, we're always talking about the ability of a person; woman to bear children. 
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3 years ago
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Based on the data in the table, what will happen when a sound wave travels from copper into lead?​
Lynna [10]

Answer:

A i believe

Explanation:

8 0
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The key to making a concise mathematical definition of escape velocity is to consider the energy. If an object is launched at it
aleksklad [387]

Answer:

The total Mechanical energy will be zero

Explanation: Escape velocity is the velocity required by a free object in order to overcome the impact of the force of gravity. The total mechanical energy of an object is the total energy possessed by an object which includes its kinectic and potential energy.

since the object is moving at an escape velocity which is 11.2m/s the object will be assumed to be weightless

Etotal = kinetic energy + potential energy

kinetic energy= 1/2*M*V*V

Potential energy=MGH

Etotal=1/2*0*11.2*11.2+0*0*0

Etotal=0+0

Etotal=0.

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3 years ago
Jean danglesher watch from a thin piece of string while the airplane she is in takes off from SFO she notices that the string ma
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