That is meters per second, same as velocity.
You need to provide a picture or tell us the examples... we can’t see what you see
Answer:
Explanation:
Let initial extension in the spring= x₀
Force on the spring = F₀
Let spring constant = k
Fo = k x₀
Fn = 3k x₀
Fn /Fo = 3
PEs0 ( ORIGINAL) =1/2 k x₀²
PEsn ( NEW) =1/2 k (3x₀)²
PEsn / PEs0 = 9
Answer:
<u>B. the stars of spectral type A and F are considered reasonably to have habitable planets but much less likely to have planets with complex plant - or animal - like life.</u>
Explanation:
The appropriate spectral range for habitable stars is considered to be "late F" or "G", to "mid-K" or even late "A". <em>This corresponds to temperatures of a little more than 7,000 K down to a little less than 4,000 K</em> (6,700 °C to 3,700 °C); the Sun, a G2 star at 5,777 K, is well within these bounds. "Middle-class" stars (late A, late F, G , mid K )of this sort have a number of characteristics considered important to planetary habitability:
• They live at least a few billion years, allowing life a chance to evolve. <em>More luminous main-sequence stars of the "O", "B", and "A" classes usually live less than a billion years and in exceptional cases less than 10 million.</em>
• They emit enough high-frequency ultraviolet radiation to trigger important atmospheric dynamics such as ozone formation, but not so much that ionisation destroys incipient life.
• They emit sufficient radiation at wavelengths conducive to photosynthesis.
• Liquid water may exist on the surface of planets orbiting them at a distance that does not induce tidal locking.
<u><em>Thus , the stars of spectral type A and F are considered reasonably to have habitable planets but much less likely to have planets with complex plant - or animak - like life.</em></u>
Answer:
The length of the wire is approximately 67.1 m
Explanation:
The parameters of the pendulum are;
The mass of the pendulum, m = 28 kg
The angle between the pendulum weight and the wire, θ = 89°
The magnitude of the torque exerted by the pendulum's weight, τ = 1.84 × 10⁴ N·m
We have;
Torque, τ = F·L·sinθ = m·g·l·sinθ
Where;
F = The applies force = The weight of the pendulum = m·g
g = The acceleration due to gravity ≈ 9.8 m/s²
l = The length of the wire
Plugging in the values of the variables gives;
1.84 × 10⁴ N·m = 28 kg × 9.8 m/s² × l × sin(89°)
Therefore;
l = 1.84 × 10⁴ N·m/(28 kg × 9.8 m/s² × sin(89°)) = 67.0656080029 m ≈ 67.1 m
The length of the wire, l ≈ 67.1 m