3 years ago

1. You drop a rock off the top of a building. It takes 6,0 s. hit the ground. How tall is the building?

Physics

2 answers:

leva [86]3 years ago

8 0

100 feet tall :)))))))

skelet666 [1.2K]3 years ago

5 0

Not very y’all..........

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a 0.24 kg blob of clay is thrown at a wall with an initial velocity of 19m/s. the clay comes to a stop against the wall in 82ms,

leva [86]

As per Newton's law we can say

$F = \frac{dP}{dt}$

here we can say

$F = \frac{m(v_f - v_i)}{\delta t}$

now we know that

$v_f = 0$

$v_i = 19 m/s$

$\delta t = 82 ms$

mass = 0.24 kg

now by above formula we will have

[tex]F = \frac{0.24(0 - 19)}{82*10^{-3}}[\tex]

so force on the wall is given by

F = 55.6 N

8 0

3 years ago

A thermometer is randomly selected and tested. Draw a sketch and find the temperature reading corresponding to Upper P 89, the

andrew11 [14]

Answer:

$X_{1}=1.23$

Explanation:

Given :

μ = 0

σ = 1

For 89th percentile

using invariant norm ( area, μ, σ )

= inv. norm ( 0.89, 0, 1 )

= 1.23

P ( x > $X_{1}$ ) = 0.89

$P\left ( \frac{X-N}{\sigma } >\frac{X_{1}-0}{1}\right )=0.89$

$P\left ( Z>Z_{1} )=0.89$

Now using Normal table, Z = 1.23

Therefore, $\frac{X_{1}-0}{1}=1.23$

$X_{1}=1.23$

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3 years ago

What does the universe look like on very large scales?

Anestetic [448]

Answer:

it looks like dots and just black space on a large scale

Explanation:

on a large scale the universe especially our milky way looks small

hope this helps

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2 years ago

A runner circles the track exactly 2 times for distance of 800m. it takes 4.0min. what is her average speed in m/s? what is her

Sindrei [870]

If the runner ends where she started, then her total displacement is $\Delta x=0\,\mathrm m$ , which means her average velocity will be

$\bar v=\dfrac{\Delta x}{\Delta t}=\dfrac{0\,\mathrm m}{4.0\,\mathrm{min}\cdot\frac{60\,\mathrm s}{1\,\mathrm{min}}=0\,\dfrac{\mathrm m}{\mathrm s}$

The total distance she traversed, however, was $\Delta d=800\,\mathrm m$ , which gives her an average speed of

$\bar s=\dfrac{\Delta d}{\Delta t}=\dfrac{800\,\mathrm m}{4.0\,\mathrm{min}\cdot\frac{60\,\mathrm s}{1\,\mathrm{min}}=3.3\,\dfrac{\mathrm m}{\mathrm s}$

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3 years ago

The formation of new neurons is called __________.

nydimaria [60]

Answer:

Neurogenesis

Explanation:

3 0

3 years ago

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