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3 years ago

Sandstone is a sedimentary rock. Which of the following characteristics would you look for in a piece of sandstone?

1 answer:

8 0

B.
Sedimentary rocks are formed by the deposition of material so it contains layers and smaller rocks. It also is good for fossil preservation.

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Pages 64 to 65 of your reading material trace an extended problem that involes lifting a bag of sugar up to a shelf at first it

nadezda [96]

Answer:

d) the amount of work is the same whether the bag is moved all at once or in two stages, provided the total height lifted is the same in either case.

Explanation:

While moving the bag to the shelf in one shot we can say that the total work done is given as

$W = mg(2H)$

here we know that

2H = total height raised by the bag

now when we raise the bag to first shelf and then move it to next shelf

then we will have

$W = W_1 + W_2[tex][tex]W = mgH + mgH$

$W = 2mgH$

so the correct answer will be

d) the amount of work is the same whether the bag is moved all at once or in two stages, provided the total height lifted is the same in either case.

7 0

3 years ago

Help Quick!!!!

jarptica [38.1K]

I’m unsure of the answer, but it is not b.

8 0

3 years ago

Read 2 more answers

A concave mirror produces a real image 1cm tall of an object 2.5mm tall placed 5cm from the mirror. Find the position of the ima

Cloud [144]

Answer:

the focal length is 4cm

Explanation:

use the formula 1+1/m = f

it is obtained from the mirror formula

m is the magnification and is the ratio of the image height to the object height

however they should have the same unit . that means you would have to do a little conversion from cm to mm or vice versa .

4 0

3 years ago

What is wave motion

torisob [31]

Answer:wave motion is a process of transferring a disturbance from one point to another in a medium without any transfer of particles of the medium

Explanation:

Wave motion is a process of transferring a disturbance (in form of kinetic energy) from one point to another in the medium without any transfer of particles of the medium

3 0

3 years ago

A 0.5 kg block is attached to a spring (k = 12.5 N/m). The damped frequency is 0.2% lower than the natural frequency, (a) What i

Tju [1.3M]

Answer:

a) 1.58 kg s^{-1}

b) x_m e^{-1.58t} x_m is initial amplitude

c) 5 kg s^{-1}

Explanation:

given data:

mass =0.5 kg

k = 12.5 N/m

from the data given

a) $w_d = w_o - \frac{0.2}{100}w_o$

$= w_o - 0.002w_o = 0.99w_o$

$w_d = \sqrt{\frac{k}{m} - \frac{b^2}{4m^2}$

$0.998w_o = \sqrt{w_o^2 - \frac{b^2}{4m^2}$

$(0.998w_o)^2 = w_o^2 -\frac{b^2}{1}$

$b^2 = w_o^2 -(0.998w_o)^2$

$b^2 = w_o^2(1-0.998^2) = 3.996 *10^{-3} w_o^2$

$b = w_o\sqrt{3.996*10^{-3}}$

$b = \frac{12.5}{0.5}\sqrt{3.996*10^{-3}} = 1.58 kg s^{-1}$

b) $x = x_m e^{\frac{-bt}{2m}}$

$x = x_m e^{-1.58t}{1} = x_m e^{-1.58t}$ where x_m is initial amplitude

c) critical damping amplitude

$c_c =2\sqrt{km} = 2\sqrt{12.5*.5} = 5 kg s^{-1}$

5 0

3 years ago