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strojnjashka [21]
2 years ago
15

please help with questions

Physics
1 answer:
kaheart [24]2 years ago
3 0

Answer:

Please selection one of the following

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A spring has a constant of 100 N/m. What Force does the spring exert on you if you stretch it a distance of 0.5 m?
arsen [322]

Answer:

F = - K x        force is opposed to direction of extension

F = -100 N / m * .5 m = -50 N

3 0
3 years ago
Identify the energy transformation in the image
Yuliya22 [10]

Answer:

d one is correct

Explanation:

as the electrical energy in the socket is transferred to the electric tea pot

4 0
2 years ago
The radius of an atom of krypton (kr) is about 1.9 å. (a) express this distance in nanometers (nm). nm express this distance in
I am Lyosha [343]
Note:
1 A (armstrong) = 10⁻¹⁰ m
1 nm (nanometer) = 10⁻⁹ m

Given:
Radius of a krypton atom = 1.9 A = 1.9 x 10⁻¹⁰ m

Part (a)
1.9\,A = (1.9\,A)*(10^{-10}\, \frac{m}{A})*( \frac{1}{10^{-8}} \frac{nm}{m}) } =0.019\,nm
Answer: 0.019 nm

Part (b)
The diameter of a krypton atom = 2*1.9A = 3.8 A = 3.8 x 10⁻¹⁰ m.
The number of krypton atoms within a length of 1.0 mm is
\frac{1.0\, mm}{3.8 \time 10^{-10}\, m} = \frac{10^{-3}\, m}{3.8 \times 10^{-10} \,m} =2.632 \times 10^{6}

Answer: About 2.632 x 10⁶ atoms

Part (c)
The radius of a krypton atom is
1.9 A = (1.9 x 10⁻¹⁰ m)*(10² cm/m) = 1.9 x 10⁻⁸ cm
The volume of a krypton atm is
\frac{4 \pi }{3} (1.9 \times 10^{-8} \, cm)^{3} = 2.873 \times 10^{-23} \, cm^{3}

Answer: 2.873 x 10⁻²³ cm³
8 0
3 years ago
A wave passes along the surface of the water in a ripple tank. Describe the motion of a molecule on the surface as the water pas
laila [671]

Answer:

Explanation:

Water waves are generally a transverse wave which do not cause permanent displacement of molecules of the medium. Transverse waves are waves in which the direction of propagation of the wave is perpendicular to the direction of vibration of the particles of the medium.

As the wave propagates from one point to another on the surface of water transferring energy, a molecule of water on its surface vibrates upwards and downwards. Its motion is perpendicular to the direction of propagation of the wave. After the vibration, it comes back to its initial position.

8 0
3 years ago
What is the weight in newtons of a person who weights 60kg
goldenfox [79]

The person does not 'weigh' 60 kg.

His <em>mass</em> may be 60 kg.  If so, then he weighs about 97 newtons
on the Moon, 193 newtons on Mars, and 588 newtons on Earth.

4 0
4 years ago
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