A 3.42 kg mass hanging vertically from an ideal spring on the surface of the earth undergoes simple harmonic motion at a place where g = 9.80 m/s2. If the spring constant of the oscillator is 12 N/m, find the period of oscillation of this setup on a planet where g = 1.60 m/s².

Group of answer choices

2.21 s

0.95 s

7.4 s

3.35 s

A 7 resistor is connected across the terminals of a 10 V. If 0.5 A current flows, what is the internal resistance of the battery?

Group of answer choices

19

2

13

8

A +5.0 C charge is placed at each of the three corners of a square of side length 70 mm. One corner of the square is kept empty. What is the magnitude of the net electrostatic force on a +6.0 C charge placed at the center of the square?

Group of answer choices

110 N

17 N

132 N

72 N

The magnitude of the electrostatic force between a 40 C point charge and a 108 C point charge is 4 N. How far apart are the charges?

Group of answer choices

0.53 m

3.12 m

2.11 m

1.34 m

The resistance of a length of 100 cm wire of cross sectional area 2 10^-6 m² is 400 . What is the resistivity of the material from which this wire is made?

Group of answer choices

3 x 10-4 .m

8 x 10-4 .m

1 x 10-6 .m

3 x 10^-4.m

7 x 10-5 .m

Two resistors in series are equivalent to a single 9 resistor, and in parallel they are equivalent to a 2 resistor. What are the values of these two resistors?

Group of answer choices

6 and 6

3 and 6

6 and 12

3 and 3

Copper wire #1 has a length L and a radius b. Copper wire #2 has a length 2L and a radius 2b. Which statement about the resistance across the ends of the wires is true?

Group of answer choices

The resistance of wire #1 is half that of wire #2.

The resistance of wire #1 is equal to that of wire #2.

The resistance of wire #1 is four times higher than that of wire #2.

The resistance of wire #1 is twice as high as that of wire #2.

A car approaches you at a constant speed, sounding its horn, and you hear a frequency of 76 Hz. After the car goes by, you hear a frequency of 65 Hz. What is the frequency of the sound emitted by the horn?

Group of answer choices

35 Hz

70 Hz

105 Hz

45 Hz

If an electron is accelerated from rest through a potential difference of 1500 V, what speed does it reach?

Group of answer choices

5.6 x 105 m/s

2.2 x 107 m/s

1.3 x 106 m/s

1.8 x 106 m/s

A factory whistle has a frequency of 1000 Hz. If a listener moves with a speed of 30 m/s away from the whistle, what frequency does this person hear?

Group of answer choices

1207 Hz

818 Hz

1072 Hz

912 Hz

One of the harmonics of a column of air in a tube that is open at one end and closed at the other has a frequency of 448 Hz, and the next higher harmonic has a frequency of 576 Hz. What is the length of the tube?

Group of answer choices

2.18 m

0.65 m

0.22 m

1.34 m

What is the wavelength of a 15 Hz sound wave if the speed of sound in air is 343 m/s?

Group of answer choices

11 m

32 m

23 m

47 m

As you are moving very quickly toward a speaker emitting a pure tone, which characteristics of the sound get larger?

Group of answer choices

Speed

Frequency

Wave length

Amplitude

Two resistors - a 5 and a 9 - are connected in parallel. A 4 resistor is then connected in series with this parallel combination. If a an ideal 6 V battery is then connected across the series-parallel combination. What is the current through the 4 resistor?

Group of answer choices

0.83 A

1.5 A

0.24 A

1.1 A

An emergency siren radiates sound uniformly in all directions. At a distance of 17 m from the siren, the intensity level is 49 db. How many watts of power does this siren put out? The threshold of human hearing is 1.0 10^-12 W/m².

Group of answer choices

0.9 mW

0.3 mW

1.2 mW

2.4 mW

Two tiny beads are 25 cm apart with no other charges or fields present. Bead A carries 10 C of charge and bead B carries 1 C. Which one of the following statements is true about the magnitudes of the electric forces on these beads?

Group of answer choices

The magnitude of the force B exerts on A is greater in magnitude than the force B exerts on A

The magnitude of the force A exerts on B is greater in magnitude than the force B exerts on A

The magnitude of the force B exerts on A is 10 times the magnitude of the force B exerts on A

The magnitude of the force A exerts on B is equal in magnitude to the force B exerts on A

A 0.25 kg harmonic oscillator has a total mechanical energy of 4.1 J. If the oscillation amplitude is 0.20 m, what is the frequency?

Group of answer choices

38.1 Hz

4.6 Hz

17.2 Hz

10.3 Hz

The magnitude of the potential difference between two parallel plates is 4V. If the plates are separated by 6 cm, what is the magnitude of the electric field between the plates?

Group of answer choices

32.8 V/m

81.4 V/m

12.9 V/m

66.7 V/m

You double your distance from a sound source that is radiating equally in all directions. What happens to the intensity of the sound?

Group of answer choices

It is four times the original intensity

It is one-fourth the original intensity

It is two times the original intensity

It is one-half the original intensity

A 90-gram wire of mass 90 g and length 1 m is under tension. When a transverse wave of frequency 890 Hz travels down the wire, its wavelength is 0.10 m and it has an amplitude of 6.5 mm. What is the tension in the wire?

Group of answer choices

239 N

574 N

710 N

944 N