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2 years ago

Which fossils are formed by sediments and found in sedimentary rock?

Physics

2 answers:

Oduvanchick [21]2 years ago

7 0

Answer:

A. a mold of a fish skeleton and a cast of a clamshell

Explanation:

just go it

Bogdan [553]2 years ago

4 0

Answer:

A. a mold of a fish skeleton and a cast of a clamshell

Explanation:

GO QUIKLY TO ANSWER IT!!

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Please help me!!!!!!

zmey [24]

Answer:

Gamma ray will get to the Earth first due to his frequency of transmission

6 0

2 years ago

Suppose you are given the following equation, where xf and xi represent positions at two instants of time, vxi is a velocity, ax

Lubov Fominskaja [6]

Answer:

Explanation:

xf = xita + vxitb + ½axtc.

xf is displacement , dimensional formula L .

Xi initial displacement , dimensional formula L

t is time , dimensional formula T ,

vxi is velocity , dimensional formula LT⁻¹

ax is acceleration , dimensional formula = LT⁻²

xf = xi t a + vxi t b + ½ ax t c.

L = aLT + b LT⁻¹ T + c LT⁻² T

From the law of uniformity , dimensional formula of each term of RHS must be equal to term on LHS

aLT = L

a = T⁻¹

b LT⁻¹ T = L

b = 1 ( constant )

c LT⁻² T = L

c = T

so a = T⁻¹ , b = constant and c = T .

6 0

2 years ago

A rifle is aimed horizontally at a target 30m away. The bullet hits the target 2.9 cm below the aiming point. What is the bullet

Luden [163]

Answer:

Speed of bullet = 389.61 m/s.

Explanation:

Considering the vertical motion of bullet

Initial vertical speed = 0 m/s

Vertical displacement = 2.9 cm = 0.029 m

Vertical acceleration = 9.81 m/s²

Substituting in s = ut + 0.5at²

0.029 = 0 x t + 0.5 x 9.81 x t²

t = 0.077 s

So ball hits the target after 0.077 s.

Now considering the vertical motion of bullet

Time = 0.077 s

Horizontal displacement = 30 m

Horizontal acceleration = 0 m/s²

Substituting in s = ut + 0.5at²

30 = u x 0.077 + 0.5 x 0 x 0.077²

u = 389.61 m/s

Speed of bullet = 389.61 m/s.

6 0

2 years ago

Read 2 more answers

As distance increases, force decrease and vise versa, as distance decreases then, force increases. This is a ________________ re

Sonbull [250]

It is indirectly proportional or inverse so it would be C

8 0

2 years ago

A ball is kicked horizontally from the top of a 150 meter tall building. The ball lands 200m from the base of the building. what

nevsk [136]

The initial velocity in the horizontal direction will be positive.

Answer: Option A

<u>Explanation:</u>

As the ball threw off the building, the ball will follow a projectile path with free fall. So the velocity components will split as horizontal and the vertical velocity. The horizontal components of velocity remain same but the vertical velocities vary at rate of 9.8 m/s (approx. 10 m/s) as the ball will be reaching the ground due to free fall.

So gravity will act upon the ball leading to exhibit acceleration due to gravity will falling. Thus with the help of second equation of motion, we can determine the time taken by the ball to reach the ground from a height of 150 m. As the second equation of motion is

$s=u t+\frac{1}{2} a t^{2}$

As the initial velocity of the ball before thrown is zero, u = 0 and as the ball is exhibiting a free fall, so acceleration a will be equal to acceleration due to gravity g. And the displacement performed by the ball will equal to height of the building.

Thus,

$150=(0 \times t)+\left(\frac{1}{2} \times g \times t^{2}\right)$

$150=\left(\frac{1}{2} \times 10 \times t^{2}\right)$

$t^{2}=\frac{150 \times 2}{10}=30$

Thus, the time taken for crossing the cliff is t = 5.5 s.

Now the distance at which the ball falls far from the base of the building is given as 200 m. So the horizontal velocity with which the ball is thrown can be found as,

$\text {Horizontal velocity}=\frac{\text {Distance}}{\text {Time}}=36.36 \mathrm{m} / \mathrm{s}$

Thus, the horizontal velocity is positive.

7 0

2 years ago