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New exercises from Khan Academy 2018-04-19T19:44:17.502823
Actualizado: hace 1 hora 34 mins


Jue, 2018-04-19 19:44
Test your knowledge of phylogenetic trees!

Choosing an appropriate inference procedure

Jue, 2018-04-19 17:53
Practice choosing an appropriate inference procedure based on the study design and type of data being analyzed.

Evidence of evolution

Jue, 2018-04-19 17:25
Test your knowledge of the evidence for evolution!

Interpreting quartiles

Jue, 2018-04-19 15:19
Practice understanding the meaning of quartiles of data sets.

Gravitational potential energy and conservation of angular momentum

Mié, 2018-04-18 21:09
Predict changes in gravitational potential energy and angular momentum for a system of two masses. 

Calculating gravitational potential energy of a system

Mié, 2018-04-18 21:09
Practice calculating the gravitational potential energy for a system of two masses. 

Predicting changes in momentum during collisions

Mié, 2018-04-18 20:51
Using the conservation of momentum to predict the change in angular momentum for an object or system during a collision. 

Conservation of angular momentum calculations

Mié, 2018-04-18 20:50
Applying the conservation of angular momentum to collisions to calculate angular quantities such as angular velocity.

Angular impulse calculations

Mié, 2018-04-18 20:33
Practice solving for angular momentum, time, or torque for a system with an external torque applied over a time interval.

Angular momentum calculations

Mié, 2018-04-18 20:33
Practice finding the angular momentum of spinning objects and objects with linear momentum.

Rotational kinetic energy

Mié, 2018-04-18 20:17
Practice comparing the rotational kinetic energy of two objects based on their shape and motion. 

Equilibrium and applied force

Mié, 2018-04-18 19:40
Practice predicting where a force should be applied to keep a bar in rotational equilibrium. 

Calculating torque

Mié, 2018-04-18 19:39
Practice calculating the clockwise or counterclockwise torque when a force is exerted on a bar that can rotate around an axis.

Evolution and natural selection

Mié, 2018-04-18 18:45
Test your knowledge of evolution and natural selection!

Convert to Roman numerals

Mié, 2018-04-18 11:10
Practice converting between roman numerals and the Hindu-Arabic numerals.

Using rotational kinematic formulas

Mar, 2018-04-17 16:20
Practical calculating time and angular quantities such as angular velocity, displacement, and acceleration using the kinematic formulas. 

Doppler effect: Wavefront diagrams and word problems

Mar, 2018-04-17 01:02
Predict how different observers hear different frequencies from word problem or wavefront diagram. 

Pressure and displacement of sound waves in tubes

Mar, 2018-04-17 00:49
Practice identifying nodes and antinodes for pressure and displacement from a standing wave diagram. 

Wavelength and frequency for a standing wave

Mar, 2018-04-17 00:39
Practice finding standing wave frequencies and wavelength from a standing wave pattern. 

Predicting wave interference patterns

Lun, 2018-04-16 21:22
Practice predicting how two wave pulses interfere to form new wave patterns as they pass through each other.