Kenny

Waves pass through two slits 9.3 cm apart. 4.2 m away from the slits is the first area of destructive interference. if the wavelength is 3.2 cm, what is the angle at which the dark fringe occurs?

14.0 degrees

10.9 degrees

12.6 degrees

9.91 degrees

Two slits are measured to be 0.027 mm apart. When monochromatic light falls on the slits, the 4th order bright fringe falls at a 9.7 degree angle. What is the wavelength of the light?

0.980

1.13

1.14

0.860

-6.56 cm

-7.46 cm

-6.96 cm

-7.18 cm

1.63

2.16

2.33

2.75

ethanol = 1.361n

plexiglas = 1.51n

Answer options:

30 Degrees

53 Degrees

63 Degrees

42 Degrees

The distance from Earth to Jupiter is approximately 588 million kilometers.

32.7 minutes

4.3 minutes

12.5 minutes

14.5 minutes

2 wires form a loop with a diameter of 28.6 cm. If the loop rotates parallel to a 2.7 T magnetic field in 0.49 s, what is the average induced emf?

0.484 V

0.661 V

0.708 V

0.233 V

n alpha particle is essentially a helium-4 nucleus, and as such has a charge of +2e and a mass of 6.6 x 10-27 kg. If one is traveling with a velocity of 1.75 x 106 m/s, what magnetic field would be needed to bend it into a circular path with a radius of 0.17 m?

0.212 T

0.180 T

0.177 T

0.151 T

n alpha particle is essentially a helium-4 nucleus, and as such has a charge of +2e and a mass of 6.6 x 10-27 kg. If one is accelerated by a voltage of 3986 V perpendicularly through a uniform 0.387 T magnetic field, what is its radius of curvature?

2.70 cm

2.86 cm

3.31 cm

2.80 cm

An electron travels 8.03 x 10^5 m/s horizontally to the east. A 0.68 T magnetic field acts perpendicular to its motion. What is the magnitude and direction of the magnetic force on the electron?

7.45 x 10-14 N to the north

7.45 x 10-14 N to the west

8.74 x 10-14 N to the east

8.74 x 10-14 N to the north

9.11 x 10-14 N to the east

The following circuit is connected to a 12 V battery. If R1=520Ω and R2=650 Ω , what is the voltage through R2? (Neglect the internal resistance of the battery.)

I can't post a pic of the circuit but it is in series

A 12.0 V car battery has a voltage drop of 4.0 V when the starter draws 95 A of current. What is the resistance of the starter?

88 m Omega

92 m Omega

84 m Omega

80 m Omega

A 6.00 V battery has an internal resistance of 0.803Ω . What is the terminal voltage if it is connected in series to a circuit with a total resistance of 92.9Ω?

5.99 V

5.87 V

5.91 V

5.89 V

Three capacitors are connected in SERIES. One has a capacitance of 9.0uF and another has a capacitance of 6.3μF . If the total capacitance is 2.1uF what is the capacitance of the third capacitor?

8.5uF

4.1uF

7.1uF

4.8uF

The electric field between two parallel plates is 9.36 x 104 V/m. If the plates are separated by 4.98 cm, what is the potential energy of an electron located at the negative plate?

3.71 keV

4.67 keV

3.91 keV

5.71 keV

A 62 V battery charges a 3875 pF air gap capacitor. After disconnecting, paraffin is placed between the plates. What is the resulting charge of the plates?

1.23 x 10-6 C

1.73 x 10-6 C

1.54 x 10-6 C

1.44 x 10-6 C

I swear I was doing it right but I keep getting the wrong answer, can someone help me solve this?

What is the potential difference between two parallel plates 4.71 cm apart if the electric field is 8.31 x 104 V/m?

3.91 kV

5.71 kV

4.67 kV

3.71 kV

Three particles of charges +61\mu C μ C , -43\mu C μ C , and -92\mu C μ C are placed in a line so that the middle charge is 31 cm from each of the others. What is the force acting on the middle charge?

376 N

239 N

615 N

An electron finds its way into a 1984 N/C electric field that points due east. What is the magnitude and direction of the electric force on the electron?

3.52 x 10-16 N west

4.42 x 10-16 N west

5.00 x 10-16 N west

3.18 x 10-16 N west