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
irga5000 [103]
3 years ago
9

Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance. Electric p

otential difference depends on current and resistance according to this function V(I,R) = IR. Your measured current and resistance have the following values and uncertainties I = 5.9 Amps, delta I space equals space 0.4 Amps and R = 42.7 Ohms and delta R space equals space 0.6 Ohms. What is the uncertainty in the , delta V ? Units are not needed in your answer.
Find the uncertainty in kinetic energy. Kinetic energy depends on mass and velocity according to this function E(m,v) = 1/2 m v2. Your measured mass and velocity have the following uncertainties delta m space equals space 0.06 kg and delta v space equals space 1.54 m/s. What is is the uncertainty in energy, delta E , if the measured mass, m = 2.27 kg and the measured velocity, v = 8.58 m/s? Units are not needed in your answer.

Find the uncertainty in a calculated electrical potential difference from the measurements of current and resistance. Electric potential difference depends on current and resistance according to this function V(I,R) = IR. Your measured current and resistance have the following values and uncertainties I = 6.6 Amps, delta I space equals space 0.6 Amps and R = 8 Ohms and delta R space equals space 0.3 Ohms. What is the uncertainty in the , delta V ? Units are not needed in your answer.
Physics
1 answer:
anygoal [31]3 years ago
3 0

Answer:

Δ V =20.62

ΔE = 16.101

Δ V = 6.78

Explanation:

Case 1:

Given:

       - I = 5.9 Δ0.4  Amps

       - R = 42.7 Δ0.6  Ohms

       - V = I*R

Solution:

The procedure for finding absolute change ΔV is by taking partial derivatives of all the physical quantities.

                             V_mean = I_mean * R_mean

                            V_mean = 5.9 * 42.7 = 251.93

To find the uncertainty ΔV:

                                  ΔV / V = ΔI / I + ΔR / R

                         ΔV / 251.93 = 0.4 / 5.9 + 0.6 / 42.7

                              ΔV / 251.93 = 2062 / 25193

                                            Δ V = 20.62

Case 2:

Given:

       - m = 2.27 Δ0.06  kg

       - v = 8.58 Δ1.54  m/s

       - E = 0.5*m*v^2

Solution:

The procedure for finding absolute change ΔE is by taking partial derivatives of all the physical quantities.

                             E_mean = 0.5*m_mean *v^2_mean

                            E_mean = 0.5*2.27*8.58^2 = 83.554614

To find the uncertainty ΔE:

                                  ΔE / E = 0.5*[Δm / m + 2*Δv / v]

                         ΔE / 83.554614 = 0.5*[0.06 / 2.27 + 2*1.54 / 8.58]

                            ΔE / 83.554614= 1706 / 8853

                                            Δ E = 16.101

Case 3:

Given:

       - I = 6.6 Δ0.6  Amps

       - R = 8 Δ0.3  Ohms

       - V = I*R

Solution:

The procedure for finding absolute change ΔV is by taking partial derivatives of all the physical quantities.

                           V_mean = I_mean * R_mean

                              V_mean = 6.6 * 8 = 52.8

To find the uncertainty ΔV:

                                  ΔV / V = ΔI / I + ΔR / R

                             ΔV / 52.8 = 0.6 / 6.6 + 0.3 / 8

                                   ΔV / 52.8 = 113 / 880

                                         Δ V = 6.78

You might be interested in
A 4 kg object moving to the left collides with and sticks to a 3 kg object moving to the right. Which of the following is true o
madam [21]

Answer:

D. The motion cannot be determined without knowing the speeds of the objects before the collision.

Explanation:

This question is tricky! We know the object moving to the left has a greater mass than the one moving to the right. We'd <em>assume</em> they would move to the left because the leftwards object has a greater mass, right?

Not. So. Fast.

We can solve for the objects' final velocity using the formula for momentum, m₁v₁ + m₂v₂ = (m₁ + m₂)v .

Now here's where the trap is sprung: <em>we don't think about the equation</em>. This shows that the final velocity of the objects and the direction depends on both the mass of the objects <em>and</em> their initial velocity.

Basically, what if the 3 kg object is moving at 1 m/s and the 4 kg object is moving at –0.5 m/s? The objects would move to the <em>right</em> after the collision!

Do we know the velocity of these objects? No, right?

That means we <em>can't</em> determine the direction of their motion <u>unless we know their initial, pre-collision velocity</u>. This question is tricky because we look at the 4 kg vs. 3 kg and automatically assume the 4 kg object would dictate the direction of motion. That's not true. It depends on velocity as well.

I hope this helps you! Have a great day!

4 0
3 years ago
A flat horizontal surface with an area of 518 cm^2 is inside a uniform electric field of 1.33 x 10^4 N/C. The angle between the
GarryVolchara [31]

Answer: 576.48 N*m^2/C

Explanation: In order to calculate the electric flux through the any surface we have to take into account the scalar product between the electric field vector and the normal vector to the surface.

So we have:

ФE= E*A= 1.33 * 10^4*0.0518* cos (33.2°)= 576.48 N*m^2/C

3 0
3 years ago
As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sa
Firlakuza [10]

As streams flow through Stone Mountain, layers of sand build up. Over time, the sand particles form a sedimentary rock called sandstone. What causes sandstone to change into metamorphic rock at Stone Mountain? Sandstone experiences intense heat and pressure.

(Correct Answer is above)

Also Mark Brainliest please.

3 0
3 years ago
Read 2 more answers
Is it illegal to attempt gerrymandering​
IRINA_888 [86]

Explanation:

The US Supreme Court has affirmed in Miller v. Johnson (1995) that racial gerrymandering is a violation of constitutional rights and upheld decisions against redistricting that is purposely devised based on race. However, the Supreme Court has struggled as to when partisan gerrymandering occurs (Vieth v.

8 0
3 years ago
Black widow (m=57000 g) shovels snow, holding the shovel at a 40 degree angle above the ground. If she uses a constant force of
Dima020 [189]

Answer:

She does a work of 689.44 J in the snow.

Explanation:

A force is said to do work when it alters the state of motion of a body. The work of the force on that body will be equivalent to the energy needed to move it.

In other words, Work is a form of energy transmission between bodies. In order to carry out work, a force must be exerted on a body and it must move.

The work is equal to the product of the force times the distance and the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:

W= F*d* cos Ф

Work W is measured in joules (J), force is measured in newtons (N), and displacement in meters (m).

In this case:

  • F= 180 N
  • d=5 m
  • Ф= 40 degrees

Replacing:

W= 180 N*5 m* cos 40

Solving:

W= 689.44 J

<u><em>She does a work of 689.44 J in the snow.</em></u>

7 0
3 years ago
Other questions:
  • How far from a -7.80 μC point charge must a 2.40 μC point charge be placed in order for the electric potential energy of the pai
    7·1 answer
  • In classical mechanics there are three base dimensions. length is one of them. what are the other two? view available hint(s)
    8·1 answer
  • Which subatomic particles have an electrical charge?
    11·2 answers
  • On an acceleration-time graph what are the units for acceleration
    12·1 answer
  • During a science fair, a group of students came up with the following question: “Is color an inherent property in objects or is
    5·2 answers
  • An engineer is considering possible trajectories to use for emergency descent of a lunar module from low moon orbit to the lunar
    7·1 answer
  • Two equal positive charges q1 = q2 = 2μC are located at x = 0, y = 0.30 m and x = 0, y = -0.30 m, respectively. What are the mag
    15·1 answer
  • Picture a long, straight corridor running east-west, with a water fountain located somewhere along it. Starting from the west en
    12·1 answer
  • my bf coming over after school and i still have no idea what to cook or make for him i can make almost everything but i have no
    5·1 answer
  • How is the energy carried per photon of light related to the wavelength of the light?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!