1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
insens350 [35]
3 years ago
10

If the gas inside the flask in the above exercise is cooled so that its pressure is reduced to a value of 715.7 torr, what will

be the height of the mercury in the open ended arm? (Hint: The sum of the heights in both arms must remain constant regardless of the change in pressure.) (a) 49.0 mm, (b) 95.6 mm, (c) 144.6 mm, (d) 120.1 mm.
Physics
1 answer:
evablogger [386]3 years ago
4 0

Answer:

(a) 49.0 mm

Explanation:

#First we need to calculate the height of the mercury arm:

Reduced pressure is 715.7torr, Initial Pressure is 797.3torr, Required pressure is:

P_g_a_s=P_a_t_m+P_h\\  

The difference in the two arms will give the pressure difference between the gas placed in the flask attached to an open-end mercury manometer.

P_g_a_s=P_a_t_m+P_h\\797.3=P_a_t_m+(136.4mm-103.8mm)\\P_a_t_m=764.7mm\\\\h_t_o_t_a_l=136.4mm+103.8mm=240.2mm\\\\P_g_a_s=P_a_t_m+\bigtriangleup h\\\bigtriangleup h=P_g_a_s-P_a_t_m\\\\\bigtriangleup h=715.7mm-764.7mm\\=-49mm

Hence the height of the mercury in the arm is 49.00mm

You might be interested in
Explain how high-pressure and low pressure systems are different
Studentka2010 [4]
Low pressure has a bit less of a function than high pressure, high pressure is more useful in certain terms
5 0
3 years ago
Describe 4 common workplace practices that are risk factors for injury
Aleonysh [2.5K]
High task repitition, forceful exertions, repetitive or sustained awkward posture
7 0
3 years ago
Den pushes a desk 400 cm across the floor. He exerts a force of 10 N for 8 s to move the desk. What is his power output? (Power:
White raven [17]

Answer:

5 W

Explanation:

The formula of the power is:

● P = W/t

W is the work and t is the time needed to do it(in seconds)

Let's calculate first the work that the force exerced:

W = Vector F . Vector d

D is the distance ( here 400 cm wich is 4 m)

Make a representation to see how are the vectors F and V.(picture below)

The vector F and d are colinear since Den is pushing the desk on the ground.

● W = 4 × 10 = 40 J

J is Joule

■■■■■■■■■■■■■■■■■■■■■■■■■■

● P = W / t

● P = 40/ 8

● P = 5 W

7 0
3 years ago
A dog is running at 15 m/s and then slows down to 10 m/s. It takes him two seconds to do this. What is the dog's acceleration
OLga [1]

Explanation:

a = (Vf-Vi)/t

= (10m/s - 15m/s)/2s

a = -5 / 2 m/s^2

• so the dog diaccelerate at the rate of 5/2 m/s^2

hope it helps

6 0
3 years ago
What are subtomic particles<br>​
slavikrds [6]

Answer:

In the physical sciences, subatomic particles are smaller than atoms. They can be composite particles, such as the neutron and proton; or elementary particles, which according to the standard model are not made of other particles. Particle physics and nuclear physics study these particles and how they interact.

Explanation:

3 0
2 years ago
Read 2 more answers
Other questions:
  • How is velocity different from speed? Velocity is based on distance. Velocity includes direction. Velocity can be an average or
    13·2 answers
  • The unit of entropy ?
    15·2 answers
  • Explain why the term Nano is used to describe nanotechnology​
    8·1 answer
  • What is a characteristic of weight &lt;br /&gt;<br>I need it please answer it​
    6·1 answer
  • Direct current is the flow of an electric charge?
    11·1 answer
  • A projectile is launched from ground level at angle u and speed v0 into a headwind that causes a constant horizontal acceleratio
    12·1 answer
  • Why is physics important for high school students to learn?
    10·1 answer
  • A car travels with initial velocity 6.0 m/s for 4.0 s, and its acceleration is 3.7 m/s2. What is the car's displacement after 4.
    11·1 answer
  • 14 What is the weight of each of
    5·1 answer
  • The Chair o
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!