Questions
Find the moment of inertia Ix of particle a with respect to the x axis

Find the moment of inertia Ix of particle a with respect to the x-axis (that is, if the x-axis is the axis of rotation), the moment of inertia Iy of particle a with respect to the y axis, and the moment of inertia Iz of particle a with respect to the z-axis (the axis that passes through the origin perpendicular to both the x and y axes).
Express your answers in terms of m and r separated by commas.

In: Physics

On which of the following does the moment of inertia of an object depend?

On which of the following does the moment of inertia of an object depend?
Check all that apply.
 
  • linear speed
  • linear acceleration
  • angular speed
  • angular acceleration
  • total mass
  • shape and density of the object
  • location of the axis of rotation

 

In: Physics

What is the speed of an electron that has been accelerated from rest through a potential difference of 1050?

What is the speed of an electron that has been accelerated from rest through a potential difference of 1050?

In: Physics

What is the electric potential energy of the group of charges in the figure?

What is the electric potential energy of the group of charges in the figure?

In: Physics

A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 45000 m/s.

A proton is released from rest at the positive plate of a parallel-plate capacitor. It crosses the capacitor and reaches the negative plate with a speed of 45000 m/s.

What will be the final speed of an electron released from rest at the negative plate?

Express your answer to two significant figures and include the appropriate units

V=_________

In: Physics

Each part of (Figure 1) shows one or more point charges. The charges have equal magnitudes.

Each part of (Figure 1) shows one or more point charges. The charges have equal magnitudes.

A) For case (a), if a positive charge is moved from position i to position f, does the electric potential energy increase, decrease, or stay the same?

For case (a), if a positive charge is moved from position to position, does the electric potential energy increase, decrease, or stay the same?

  Electric potential energy increases.
  Electric potential energy decreases.
  Electric potential energy stays the same.
  It's impossible to determine.

B)For case (b), if a positive charge is moved from position i to position f, does the electric potential energy increase, decrease, or stay the same?

For case (b), if a positive charge is moved from position to position, does the electric potential energy increase, decrease, or stay the same?

  Electric potential energy increases.
  Electric potential energy decreases.
  Electric potential energy stays the same.
  It's impossible to determine.

C)For case (c), if a positive charge is moved from position i to position f, does the electric potential energy increase, decrease, or stay the same?

For case (c), if a positive charge is moved from position to position, does the electric potential energy increase, decrease, or stay the same?

  Electric potential energy increases.
  Electric potential energy decreases.
  Electric potential energy stays the same.
  It's impossible to determine.

D)For case (d), if a positive charge is moved from position i to position f, does the electric potential energy increase, decrease, or stay the same? For case (d), if a positive charge is moved from position to position, does the electric potential energy increase, decrease, or stay the same?

  Electric potential energy increases.
  Electric potential energy decreases.
  Electric potential energy stays the same.
  It's impossible to determine.

In: Physics

As shown, two protons are launched with the same speed from point 1 inside a parallel-plate capacitor.

As shown, two protons are launched with the same speed from point 1 inside a parallel-plate capacitor. One proton moves along the path from 1 to 2 , the other from 1 to 3 . Points 2 and 3 are the same distance from the positive plate.

a. Is \(\Delta U_{1 \rightarrow 2}\), the change in potential energy along the path \(1 \rightarrow 2\), larger than, smaller than, or equal to \(\Delta U_{1 \rightarrow 3}\) ? Explain.

b. Is the proton's speed \(v_{2}\) at point 2 larger than, smaller than, or equal to the proton's speed \(v_{3}\) at point 3 ? Explain.

In: Physics

How much does the electric potential energy change as the electron moves from i to f?

n electron (q=-e) completes half of a circular orbit of radius r around a nucleus with Q=+3e.

a. How much work is done on the electron as it moves from i to f? Give either a numerical value if you knew the radius. Justify your answer.

b. By how much does the electric potential energy change as the electron moves from i to f?

c. Is the electron's speed at f greater than, less than, or equal to its speed at i?

In: Physics

Consider the circuit shown in (Figure 1) . Suppose that E = 15 V

Consider the circuit shown in (Figure 1). Suppose that E = 15 V . include units with answers.

Part A: Find the current through the resistor a.

Part B: Find the potential difference across the resistor a. answer: 7.5 V

Part C: Find the current through the resistor b.

Part D: Find the potential difference across the resistor b.

Part E: Find the current through the resistor c.

Part F: Find the potential difference across the resistor c.

Part G: Find the current through the resistor d.

Part H: Find the potential difference across the resistor d.

In: Physics

Find the current through resistor a) in the figure. (Figure 1)

1. Find the current through resistor a) in the figure. (Figure 1) Express your answer to two significant figures and include the appropriate units.

2. Find the potential difference across resistor a) in the figure.

3. Find the current through resistor b) in the figure.

4. Find the potential difference across resistor b) in the figure.

5. Find the current through resistor c) in the figure.

6. Find the potential difference across resistor c) in the figure.

7. Find the current through resistor d) in the figure.

8. Find the potential difference across resistor d) in the figure.

In: Physics

The switch in the figure (Figure 1) has been in position a for a long time. It is changed to position b at t=0s.

Part A

What is the charge Q on the capacitor immediately after the switch is moved to position b?

Express your answer using two significant figures.

 
   
 
Q =     ?C  

 

Part B

What is the current I through the resistor immediately after the switch is moved to position b?

Express your answer using two significant figures.

 
   
 
I =     mA  

 

Part C

What is the charge Q on the capacitor at t=50?s?

Express your answer using two significant figures.

 
   
 
Q =     ?C  

 

Part D

What is the current I through the resistor at t=50?s?

Express your answer using two significant figures.

 
   
 
I =     mA  

 

Part E

What is the charge Q on the capacitor at t=200?s?

Express your answer using two significant figures.

 
   
 
Q =     ?C  

 

Part F

What is the current I through the resistor at t=200?s?

Express your answer using two significant figures.

 
   
 
I =     mA

In: Physics

How long does it take to reduce the capacitor's charge to 10 μC?

A 20 μF capacitor initially charged to 25 μC is discharged through a 1.5 kΩ resistor. Part A How long does it take to reduce the capacitor's charge to 10 μC?

 

In: Physics

What is the equivalent capacitance for the circuit of the figure? (Figure 1)

Part A

What is the equivalent capacitance for the circuit of the figure? (Figure 1)
Express your answer to two significant figures and include the appropriate units.

Part B

How much charge flows through the battery as the capacitors are being charged?
Express your answer to two significant figures and include the appropriate units.

In: Physics

How many unique 1H NMR signals exist in the spectrum of the following compound?

How many unique 1H NMR signals exist in the spectrum of the following compound?

In: Chemistry

In many animal cells, the uptake of glucose into the cell occurs by a cotransport mechanism, in which glucose is cotransported with Na^+ ions.

In many animal cells, the uptake of glucose into the cell occurs by a cotransport mechanism, in which glucose is cotransported with Na+ ions.

Complete the diagram below using the following steps.

  • Drag the pink labels to the pink targets, indicating the relative concentration at glucose inside and outside the cell.
  • Drag the correct white target to the white target, indicating the direction that Na+ ions and glucose move through the cotransporter
  • Drag the blue labels to complete the sentences on the right, indicating how Na+ ions and glucose move through the cotransporter relative to their electrochemical and concentration gradients.

In: Biology