P.3.1 Measurements and their errors

Which list puts the forces in order of increasing magnitude?

• 2 pN < 2 fN < 2 TN < 2 GN

• 2 pN < 2 fN < 2 GN < 2 TN

• 2 fN < 2 pN < 2 TN < 2 GN

• 2 fN < 2 pN < 2 GN < 2 TN

Tags

NGSS.HS-PS2-4

1.0 kilowatt-hour (kW h) is equivalent to

• 6.3 × 10¹⁸ eV

• 6.3 × 10²¹ eV

• 2.3 × 10²² eV

• 2.3 × 10²⁵ eV

Which is equivalent to the ohm?

• J C^–2 s^–1

• J C^–2 s

• J s

• J s^–1

What is a correct unit for the area under a force−time graph?

• N m

• kg m s^–1

• kg m s^–2

• N s^–1

Two gamma photons are produced when a muon and an antimuon annihilate each other. What is the minimum frequency of the gamma radiation that could be produced?

• 2.55 × 10¹⁶ Hz

• 5.10 × 10¹⁶ Hz

• 2.55 × 10²² Hz

• 5.10 × 10²² Hz

The diagram shows an energy-level diagram for a hydrogen atom. Electrons, each having a kinetic energy of 2.0 × 10^–18 J, collide with atoms of hydrogen in their ground state. Photons are emitted when the atoms de-excite. How many different wavelengths can be observed with incident electrons of this energy?

• 1

• 3

• 6

• 7

Photons of wavelength 290 nm are incident on a metal plate. The work function of the metal is 4.1 eV

What is the maximum kinetic energy of the emitted electrons?

• 0.19 eV

• 4.3 eV

• 6.9 eV

• 8.4 eV

A diffraction grating has 500 lines per mm. When monochromatic light is incident normally on the grating the third-order spectral line is formed at an angle of 60° from the normal to the grating.

What is the wavelength of the monochromatic light?

• 220 nm

• 580 nm

• 960 nm

• 1700 nm

A mobile phone operates at a constant power of 200 mW.

It has a 3.7 V lithium-ion battery that has a charge capacity of 9400 C

What is the time taken for the battery to discharge completely?

• 2 hours

• 48 hours

• 120 hours

• 140 hours

An object of mass 0.15 kg performs simple harmonic motion. It oscillates with amplitude 55 mm and frequency 0.80 Hz

What is the maximum value of its kinetic energy?

• 5.7 × 10^–3 J

• 11 × 10^–3 J

• 0.57 J

• 11 J