Which one of the following is not attracted or repelled by charged objects?

1. An electric field (in v/m) varies with postion along the y axis according to E = 1/y. Find the electric potential difference V_AB if A is a point on the y axis at y = 5 m and B is a point on the y axis at y = 7 ?

1. V_AB = 0.28 volts
2. V_AB = 0.34 volts
3. V_AB = 0.49 volts
4. V_AB = 0.82 volts

2. How does the electric potential at a point x, a finite distance away from a large positive charge, compare to a point x/2 from the charge?

1. The potential is half as big
2. The potential is twice as big
3. It depends upon the amount of charge
4. It depends upon the magnitude of x

3.

2. Which of the following doesn't depend upon the charge that moves from one point in an electric field to another?

1. The change in electric potential energy
2. The work done by the E-field
3. The change in electric potential
4. The change in kinetic energy

Ideal Gas equation.

I understand why PV=MRT but what i dont understand is. Why in this problem P1*V1/M1*R1*T1=P2*V2/M2*R2*T2

https://www.chegg.com/homework-help/Thermodynamics-8th-edition-chapter-7-problem-89P-solution-9780073398174

A 50 cm long rod is half aluminum and half copper. The aluminum end is in boiling water. The end of an aluminum rod (50 cm long) is maintained at 100 C by immersing in a pot of boiling water and the other end at 00C by an ice-water mixture. If the cross-sectional area of the rod is 1.3 cm2, how much will the rod melt in 20 min? What will be the steady temperature at the Al-Cu junction?

Instructions

Identify a current problem in physics by searching for news articles and current events. One reputable source of news in physics is Phys.org. Choose one article, and in two pages, describe how the scientific method is being used to solve the problem mentioned in the article. Identify the initial observations that identified the problem, the hypothesis, tests, and any revisions of the original hypothesis. Cite the article in APA format as well as other references you might use.

LINK:
https://phys.org/physics-news/

An air-filled parallel-plate capacitor has plates of area 2.40 cm^2 separated by 3.00 mm. The capacitor is connected to a(n) 23.0 V battery.

(a) Find the value of its capacitance.

pF

(b) What is the charge on the capacitor?

pC

(c) What is the magnitude of the uniform electric field between the plates?

N/C

The lens and mirror are sperated by d=1.0 m and have focal lengths of 80.0 cm and 50.0 cm, respectively. An object is placed p=1.0 m to the left of the lens as shown.

a) Locate the final image, formed by light that has gone through the lens twice

b) Determine the overall magnification of the image.

c) is the final image inverted or upright?

ANS q=160 cm M= -0.8 Inverted

1) Calculate the energy, in units of Joules and eV, and momentum, in kg*m/s and eV/c, for a photon with wavelengths of: a) 1.5 pm, b) 120 nm, and c) 21.4 cm.

Water has a mass per mole of 18.0 g/mol, and each water molecule (H2O) has 10 electrons. (a) How many electrons are there in 3.77 liters of water? (1 liter is equivalent to 1.00 × 10-3 m3) (b) What is the net charge of all these electrons?

1. Two 2.0 kg bodies, A and B, collide. The velocities before the collision are: v_A =(15iˆ-30jˆ)m/s and :v_B =(-10iˆ-5.0jˆ)m/s. After the collision, :v_fA = (-5.0iˆ - 20jˆ ) m/s. What are (a) the final velocity of B and (b) the change in the total kinetic energy (including sign)?

A 7450 kg rocket blasts off vertically from the launch pad with a constant upward acceleration of 2.25 m/s2 and feels no appreciable air resistance. When it has reached a height of 500 m , its engines suddenly fail so that the only force acting on it is now gravity.

A. What is the maximum height this rocket will reach above the launch pad?

B. How much time after engine failure will elapse before the rocket comes crashing down to the launch pad?

C. How fast will it be moving just before it crashes?

A sports car is moving at a constant velocity in the +x direction on a flat horizontal street.

1) The net force on the car is doing positive work. True or False

2) The driver presses the accelerator, the car accelerates in the same direction and, thus positive non-conservative work is being done.  True or False

3) As the car accelerates, the kinetic energy increases and the momentum decreases.  True or False

4) As the car accelerates, the potential energy decreases.  True or False

5) The driver stops pressing the accelerator and the cars coasts without friction up a ramp. Going up the ramp the total mechanical energy is constant  True or False

6) While moving up the ramp, the potential energy increases by the same amount as the kinetic energy decreases.  True or False

7) When the car started coasting, its speed was 10.0 m/s. How much higher does the car go before starting to roll backwards? (in units of meters)

8) If all other conditions were the same the car would go higher on the moon.  True or False

9) The kinetic energy of a rolling ball can decrease without a change in its speed.  True or False

10) If the kinetic energy of a rolling ball increases, the magnitude of its momentum must decrease.  True or False

electrical resistance

1. The high-resistance paper has a resistivity of 1:25 Ωm. How do your values compare? What
are possible causes for discrepancies between the known value and your calculated values?

Resistivity measurements

** thickness = .25 mm

2. What are possible causes for discrepancies between theoretical and measured values of resistors in series and in parallel?

3. When it is practical to connect resistances in series and when in parallel?

1) How well do the shapes of the equipotential curves and the electric field lines reflect the geometry of the charge distribution?

2) One of the theoretical rules of electric fields is that the equipotential curves is that the equipotential curves never cross each other, nor the fields lines. So imagine in an experiment, they cross each other. What will be the cause of that case in this experiment?

Thanks for help

I need artıcles pdf or wored about Thermoluminescence dose response of the crystals grown naturally on rocks pdf or wored