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4 years ago

11

Where did the elements in our solar system come from? they condensed out of hot gas clouds surrounding the early sun. they were

accreted from other solar systems. they were transformed from helium and hydrogen by the solar furnace?

1 answer:

Afina-wow [57]4 years ago

6 0

I think the correct answer would be that <u>they condensed out of hot gas clouds surrounding the early sun.</u><span />

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The displacement d (m) of a block sliding along a straight line is given by the equation d = -0.65 t + 0.21 t2, where t is the t

ivolga24 [154]

Answer:

<h3><em>0.19m/s</em></h3>

Explanation:

velocity is the change in displacement of a body with respect to time. Given the displacement d (m) of a block sliding along a straight line is given by the equation d = -0.65 t + 0.21 t², where t is the time in seconds, instantaneous velocity is expressed by differentiating the displacement with respect to time

Velocity = dd/dt

Velocity = -0.65 + 2(0.21)t²⁻¹

Velocity = -0.65 + 0.42t

The instantaneous velocity of the block when t = 2.0 s can be gotten by substituting t = 2.0s into the expression above:

Velocity = -0.65 + 0.42(2)

Velocity = -0.65 + 0.84

Velocity = 0.19

<em>Hence the instantaneous velocity of the block when t = 2.0 s is 0.19m/s</em>

4 0

3 years ago

now suppose that we have attached not just two springs in series, but N springs. Write an equation that expresses the effective

sammy [17]

Answer:

$k_{eq} = \frac{k}{N}$

Explanation:

For this exercise let's use hooke's law

F = - k x

where x is the displacement from the equilibrium position.

x = $- \frac{F}{k}$

if we have several springs in series, the total displacement is the sum of the displacement for each spring, F the external force applied to the springs

x_ {total} = ∑ x_i

we substitute

x_ {total} = ∑ -F / ki

F / k_ {eq} = -F $\sum \frac{1}{k_i}$

$\frac{1}{k_{eq}} = \frac{1}{k_i}$ 1 / k_ {eq} = ∑ 1 / k_i

if all the springs are the same

k_i = k

$\frac{1}{k_{eq}} = \frac{1}{k} \sum 1 \\$

$\frac{1}{k_{eq} } = \frac{N}{k}$

$k_{eq} = \frac{k}{N}$

6 0

3 years ago

A car is moving at a speed of 50 km/hour.the driver takes her foot off the accelerator and the car coasts to stop.why?

vodka [1.7K]

Because of the opposing forces on the car like friction because there is no more acceleration

3 0

4 years ago

What ideas from the American Revolution inspired leaders of the French Revolution

Veronika [31]

Answer:

The newly-formed government of the United States also became a model for French reformers. Ideas that were once just abstract thoughts – such as popular sovereignty, natural rights, constitutional checks and balances and separation of powers – were now part of an actual political system that worked

3 0

3 years ago

Read 2 more answers

The maximum tension that a 0.80 m string can tolerate is 15 N. A 0.35-kg ball attached to this string is being whirled in a vert

zimovet [89]

Answer:

v=5.86 m/s

Explanation:

Given that,

Length of the string, l = 0.8 m

Maximum tension tolerated by the string, F = 15 N

Mass of the ball, m = 0.35 kg

We need to find the maximum speed the ball can have at the top of the circle. The ball is moving under the action of the centripetal force. The length of the string will be the radius of the circular path. The centripetal force is given by the relation as follows :

$F=\dfrac{mv^2}{r}$

v is the maximum speed

$v=\sqrt{\dfrac{Fr}{m}} \\\\v=\sqrt{\dfrac{15\times 0.8}{0.35}} \\\\v=5.86\ m/s$

Hence, the maximum speed of the ball is 5.86 m/s.

3 0

3 years ago