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3 years ago

Which pair of elements has the most similar properties?

Physics

1 answer:

Vanyuwa [196]3 years ago

7 0

The answer is B, because oxygen and sulfur are in the same group (group 6A)

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Explain the amount of chromosomes and gene combinations in a parent cell and offspring that result from meiosis and fertilizatio

Lera25 [3.4K]

The process where haploid sex cells are created from diploid parents is called ... and testes and represents the formation of haploid egg and sperm as a result of meiosis. ... assortment gives rise to exponential gene combinations in the offspring. ... results in the production of gametes with an oddnumber of chromosome

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3 years ago

Rex Things throws his mother's crystal vase upwards with an initial velocity of 26 m/s. Determine the time it would take for the

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3 years ago

A 10 kg mass stretches a spring 70 cm in equilibrium. Suppose a 2 kg mass is attached to the spring, initially displaced 25 cm b

NARA [144]

Answer:

Explanation:

1. Find spring constant k. From a free body diagram, you will get the forces on the 10 kg mass, with a displacement d. It will be gravity pulling the mass down and the spring force pulling the mass up. The 10 kg mass is in equilibrium. The resulting equation will be:

$F = m_1a = kd - m_1g = 0 => m_1g = kd => k = \frac{m_1g}{d}$

2. Use the result from 1. to find the equations of motion. In general they are given by:

$x(t) = Acos(\omega t + \phi), v(t) = -\omega Asin(\omega t + \phi)$ , where ω is: $\omega = \sqrt{\frac{k}{m_2}}=\sqrt{\frac{m_1g}{m_2d}}$

To find the amplitude A and the phase angle Ф, use the given initial conditions:

m₂ = 2 kg, x(0) = -0.25 m, v(0) = 2m/s

$-0.25 = Acos(\phi)\\2 = -\omega Asin(\phi)= -\sqrt{\frac{m_1g}{m_2d}}Asin(\phi)\\-0.24 = Asin(\phi)$

Solving for Ф:

$\frac{0.24}{0.25}=tan(\phi) => \phi = 0.76$

Solving for A:

$-0.25 = Acos(\phi) => A = -\frac{0.25}{cos(\phi)}=-0.35$

The equation for x(t) is now:

$x(t) = -0.35 cos(\sqrt{\frac{m_1g}{m_2d}t} +0.76)$

The frequency f is given by: $f = \frac{\omega}{2\pi}$

The period T is given by: $T = \frac{2\pi}{\omega}$

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3 years ago

A spring has a spring constant of 50 N/m. If you stretch the spring 0.2 m past'

Amiraneli [1.4K]

Answer:

10N

Explanation:

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3 years ago

Where is the acceleration zero?

ladessa [460]

Answer:

When acceleration is zero (that is, a = dv/dt = 0), rate of change of velocity is zero. That is, acceleration is zero when the velocity of the object is constant. so probably D

Explanation:

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2 years ago