Unsolved Problems

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Total problems solved: 0/2023 (0%)

EN solutions: 407
RU solutions: 1514
Unique solutions: 1551

Chapter 1: Kinematics

1.4: Galileo's transformations

17/18

Chapter 2: Dynamics

2.1: Newton's laws

50/67

2.2: Momentum. Center of mass

11/47

2.3: Kinetic energy. Work. Potential energy

12/49

2.4: Energy of a system. Energy transfer. Power

11/45

2.5: Collisions

8/39

2.6: Gravitational force. Kepler's laws

14/53

2.7: Rotation of a solid body

9/48

2.8: Statics

13/44

Chapter 3: Oscillations and Waves

3.1: Small deviations from equilibrium

16/17

3.2: Period and frequency of free oscillations

16/37

3.3: Harmonic motion

4/36

3.4: The superposition of oscillations

0/19

3.5: Forced and damped oscillations

0/42

3.6: Strain and stress. Wave's speed

0/28

3.7: Wave propagation

0/22

3.8: Overlapping and reflection of waves

0/20

3.9: Sound. Acoustic resonators

0/26

Chapter 4: Fluid Mechanics

4.1: Fluid Pressure

5/24

4.2: Swimming. Archimedes' law

12/27

4.3: The motion of an ideal fluid

0/21

4.4: Viscous fluid flow

0/9

4.5: Fluid surface tension

4/27

4.6: Capillary phenomena

1/17

Chapter 5: Molecular Physics

5.1: Thermal motion of particles

0/11

5.2: Distribution of gas molecules by velocity

1/17

5.3: Collisions of molecules. Transfer processes

3/14

5.4: Rare gases. Interaction of molecules with the surface of a solid body

2/20

5.5: Equation of state of an ideal gas

2/36

5.6: First Law of Thermodynamics. Heat capacity

3/31

5.7: Gas flow

0/9

5.8: Probability of a thermodynamical state

0/16

5.9: Second Law of Thermodynamics

4/26

5.10: Phase transitions

0/35

5.11: Thermal radiation

0/17

Chapter 6: Electrostatics

6.1: Coulomb's law. Electric field

0/21

6.2: The flux of the electric field. Gauss's theorem

4/15

6.3: The potential of an electric field. Conductors in a constant electric field

0/40

6.4: Capacitors

1/18

6.5: Electrical pressure. The energy of an electric field

5/30

6.6: The electric field in the presence of a dielectric

1/30

Chapter 7: Motion of charged particles in an electric field

7.1: Movement in a constant electric field

9/28

7.2: Focusing charged particles

0/14

7.3: Motion in an alternating electric field

2/15

7.4: Interaction of charged particles

5/38

Chapter 8: Electric current

8.1: Current. Current density. Current in vacuum

0/21

8.2: Conductivity. Resistance. Sources of electromotive force

0/34

8.3: Electric circuits

1/48

8.4: Capacitors and non-linear elements in electrical circuits

0/21

Chapter 9: Constant magnetic field

9.2: The magnetic field of a moving charge. Induction of the magnetic field from a linear current

17/23

9.3: The magnetic field from a current distributed over a surface of space

1/24

9.4: Magnetic flux

0/13

Chapter 10: Motion of charged particles in complex fields

10.1: Motion in a homogeneous magnetic field

2/29

10.2: Drift motion of particles

5/12

Chapter 11: Electromagnetic induction

11.1: The motion of conductors in a constant magnetic field. Electric motors

2/32

11.2: Vortex electric field

1/21

11.3: Mutual inductance. Inductance of conductors. Transformers

0/25

11.4: AC electrical circuits

0/25

11.5: Magnetic flux conservation. Superconductors in magnetic field

2/28

11.6: Relation of an alternating electric field to a magnetic field

0/12

Chapter 12: Electromagnetic waves

12.1: Properties of emission and reflection of electromagnetic waves

3/34

12.2: Propagation of electromagnetic waves

0/15

Chapter 13: Geometrical optics. Photometry. Quantum nature of light

13.1: Rectilinear propagation and reflection of light

0/20

13.2: Refraction of light. The lens formula

2/23

13.3: Optical systems

2/28

13.4: Photometry

7/25

13.5: The quantum nature of light

2/9

Chapter 14: Special theory of relativity

14.1: The constancy of the light speed. Velocity addition

2/28

14.2: The slowing down of time and the reduction in the size of bodies in motion; the Lorentz Transformations

1/18

14.3: The transformation of electric and magnetic fields

1/28

14.4: Motion of relativistic particles in electric and magnetic fields

0/31

14.5: Conservation of mass and momentum

2/24