All categories

3 years ago

I need help!!! 60 POINTS!!!!

Physics

2 answers:

galina1969 [7]3 years ago

8 0

The answer is "A and B are different elements, while C is an isotope of B".

Scrat [10]3 years ago

3 0

Correct one is b
Good luck

You might be interested in

An airplane, flying horizontally at an altitude of 3 miles, passes directly over an observer. If the constant speed of the air

natima [27]

I’m not sure if this helped you so here you go

6 0

3 years ago

Water is flowing in a pipe with a varying cross-sectional area, and at all points the water completely fills the pipe. At point

RideAnS [48]

Answer:

a) 2.33 m/s

b) 5.21 m/s

c) 882 m³

Explanation:

Using the concept of continuity equation

for flow through pipes

$A_{1}\times V_{1} = A_{2}\times V_{2}$

Where,

A = Area of cross-section

V = Velocity of fluid at the particular cross-section

given:

$A_{1} = 0.070 m^{2}$

$V_{1} = 3.50 m/s$

a) $A_{2} = 0.105 m^{2}$

substituting the values in the continuity equation, we get

$0.070\times 3.50 = 0.105\times V_{2}$

$V_{2} = \frac{0.070\times 3.5}{0.150}m/s$

$V_{2} = 2.33m/s$

b) $A_{2} = 0.047 m^{2}$

substituting the values in the continuity equation, we get

$0.070\times 3.50 = 0.047\times V_{2}$

$V_{2} = \frac{0.070\times 3.5}{0.047}m/s$

$V_{2} = 5.21m/s$

c) we have,

Discharge $Q = Area (A)\times Velocity(V)$

thus from the given value, we get

$Q = 0.070m^{2}\times 3.5m/s\$

$Q = 0.245 m^{3}/s$

Also,

Discharge $Q = \frac{volume}{time}$

given time = 1 hour = 1 ×3600 seconds

substituting the value of discharge and time in the above equation, we get

$0.245m^{3}/s = \frac{volume}{3600s}$

$0.245m^{3}/s\times 3600 = Volume$

volume of flow = $882 m^{3}$

8 0

3 years ago

"I help people adopt beneficial behaviors such as a balanced diet and exercise. I am a ______ psychologist." A. Rehabilitation B

Rama09 [41]

Answer:

health

Explanation:

rehabilitation focuses on people who come back from certain habits

development focuses on infants and kids behavior

community focuses on community problems

8 0

3 years ago

Read 2 more answers

Jane made the following table to compare the functions of physical structures in plants and animals: Function Animal Structure P

VMariaS [17]

Answer:

support

Explanation:

5 0

2 years ago

Describe the position of the earth in relation to the sun in the winter and summer for the Northern Hemisphere.

goblinko [34]

During the summer, the Northern Hemisphere of the Earth is angled toward the sun as the Earth revolves around the sun. During the winter, the Northern Hemisphere of the Earth is oriented away from the sun creating a shorter day and a longer night.

4 0

3 years ago