25.

A 500 Ohm, 200 Ohm, and 300 Ohm resistors are all in series and connected to 100 V power supply. What is the potential difference across the 200 Ohm resistor? Explain.

100 V

30 V

20 V

50 V

26.

What is the de Broglie wavelength of a 0.001 kg marble moving at a speed of 3.00 m/s? (h = 6.626 x 10^-34 Js) Explain.

1.99 x 10^-35 m

2.21 x 10^-35 m

1.99 x 10^-31 m

2.21 x 10^-31 m

27.

An engine is 99% efficient. How much work could an engine that runs at 888 J produce? Explain.

800 J

897 J

888 J

879 J

29.

A refrigerator lowers the temperature, or internal energy, of substances, which are largely isovolumetric. Which sentence best describes this process?

The substance takes cold from the refrigerator and does not change volume in the process.

The substance gives heat to the refrigerator and changes volume in the process.

The substance takes heat from the refrigerator and changes volume in the process.

The substance gives heat to the refrigerator and does not change volume in the process.

30.

Which statement correctly describes the electric force, electric field, electric potential energy, and electric potential difference?

the field and potential difference are intrinsic; force and potential energy require more than one charge

the field and potential energy are intrinsic, force and potential difference require more than one charge

the force and potential energy are intrinsic, field and potential difference require more than one charge

the force and potential difference are intrinsic, field and potential energy require more than one charge

33.

What is the rest energy of a hydrogen atom whose atomic mass is 2.014101778? (m_proton = 1.0078251, m_neutron = 1.0086649, c² = 931.5 eV/u) Explain.

1876 eV

939 eV

940 eV

1879 eV

34.

By definition, the work done on a gas or liquid by a gas or liquid, is NOT:

adiabatic

isothermal

isovolumetric

isotoner

36.

What is the electrostatic force between two +1.0 C charges that are 0.5 m apart? (Coulomb's constant is 9.0 10⁹ Nm²/C²; e = -1.602 x 10^-19 C) Explain.

1.8 x 10¹⁰ N

3.6 x 10¹⁰ N

4.0 x 10⁰ N

2.0 x 10⁰ N

37.

During a photoelectric effect experiment, light possessing 2.56 eV of energy is incident on the photosensitive material. The work function of the material is 0.250 eV. What is the kinetic energy of the emitted electrons?

4.10 x 10^-19J

3.70 x 10^-19 J

4.00 x 10^-20 J

4.50 x 10^-19 J

40.

Two objects of differing temperatures are held so that they are in thermal contact with each other. Which situation best describes the scenario?

hot object transfers heat to cold object/cold object cools down/heat transferred via conduction

hot object transfers heat to cold object/cold object heats up/heat transferred via conduction

hot object transfers heat to cold object/cold object heats up/heat transferred via convection

cold object transfers heat to hot object/cold object heats up/heat transferred via conduction