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3 years ago

13

Pls someone help me plss guys!!! I will give you brainiest

1 answer:

Alexxandr [17]3 years ago

3 0

Radioactivity is a part of our earth - it has existed all along. Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the food we eat and drink. There are radioactive gases in the air we breathe. Our own bodies - muscles, bones, and tissue - contain naturally occurring radioactive elements.

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The picture below shows a river flowing through a canyon.

quester [9]

Answer:

Option A

Explanation:

Water posses hydraulic force and hence it carries off all the particles that lie in its way of flow.

The canyon route have rocks and soil which are first broken down by river velocity and turbulence and then carried away from their base location there by clearing way for the canyon to widen further

Hence, option A is correct

5 0

3 years ago

If the air temperature is +8 °C at an elevation of 1,350 feet and a standard (average) temperature lapse rate exists, what will

Gala2k [10]

Answer:

Approximate freezing level is at 5350 feet.

Explanation:

We know that the standard lapse rate equals $-2^{o}C$ per 1000 feet

and freezing occurs at a height where the temperature becomes equal to

$0^{o}C$

Thus the standard equation of temperature at any height becomes

$t=mh+c\\\\\therefore t=\frac{-2}{1000}h+c$

The constant 'c' can be obtained by using the boundary condition that at

h=1350 feet temperature equals $8^{o}C$

$8=\frac{-2}{1000}\times 1350+c\\\\\therefore c=8+2.7=10.7\\\\\therefore t=\frac{-2}{1000}h+10.7$

Thus the height at which temperature becomes zero equals

$0=-0.002h+10.7\\\\h=\frac{10.7}{0.002}=5350feet$

7 0

4 years ago

Place the following types of bridges in order, from weakest to strongest: A. Suspension bridge B. Arched bridge C. Beam bridge?

zmey [24]

Where is it ????????????????

5 0

3 years ago

Read 2 more answers

A cart is given an initial velocity of 2 m/s and experiences a constant acceleration of 2 m/s2. What is the magnitude of the car

muminat

Answer: 48 m

Explanation:

Since we are dealing with constant acceleration, we can use the following equations:

$V=V_{o}+a.t$ (1)

$V^{2}={V_{o}}^{2}+2ad$ (2)

Where:

$V$ is the cart’s final velocity

$V_{o}=2 m/s$ is the cart’s initial velocity

$a=2 m/s^{2}$ is the cart's acceleration

$t=6 s$ is the time

$d$ is the cart's displacement

So, firstly we have to find $V$ from (1):

$V=2 m/s+(2 m/s^{2})(6 s)$ (3)

$V=14 m/s$ (4)

Isolating $d$ from (2) and substituting (4):

$d=\frac{V^{2}-V_{o}}^{2}}{2a}$ (5)

$d=\frac{(14 m/s)^{2}-(2 m/s)}^{2}}{2(2 m/s^{2})}$ (6)

Finally:

$d=48 m$

5 0

4 years ago

Loudness is measured in decibel units true or falsr

Cerrena [4.2K]

Noise can be measured in decibels.

7 0

3 years ago