A 0.453 kg toy car moving at 1.15 m/s is going up a semi-circular hill with a radius of 0.89 m. When the hill makes an angle of 32° with the horizontal, what is the magnitude of the force normal on the car?

A rainy day spent inside helps a little boy learn about clouds and the water cycle from his mother. He sees the value of rain to plants, animals, people and the planet, even when the rain is not convenient for him. As the rain...

The Olympics are a unique chance to marvel at the physical abilities of these world-class athletes. But what makes them unique? After all, they're made of the same flesh and blood as the rest of us--how did they become Olympians? Dan...

From the section: Getting Started With Reinforcement Learning Using OpenAI Gym. In this section, we will introduce the basics of the reinforcement learning problem, and explain how OpenAI gym helps with developing and research...

This clip explores the geography, history, and some important cultural features of North Carolina.

Join young host Marisa as she takes you on a fun-filled adventure through the alphabet with both familiar and exotic animals from A to Z! Each upper-case letter of the alphabet gets presented slowly, several times with large,...

For centuries the Forum was the center of day-to-day life in Rome: the site of triumphal processions and elections; the venue for public speeches, criminal trials, and gladiatorial matches; and the nucleus of commercial affairs. Here...

The basilica of Santi Cosma e Damiano is a church in the Roman Forum, parts of which incorporate original Roman buildings. The circular building at the entrance onto the Forum was built in the early 4th century as a Roman temple, thought...

The Temple of Castor and Pollux in the Roman Forum, Rome, was originally built in 484 BC and rebuilt by Tiberius in 6 AD. Three columns and part of the architrave stand today. Castor and Pollux were the Dioscuri, the "twins" of Gemini,...

The Correspondence Principle in Quantum Mechanics

The name Perperikon dates from the Middle Ages. There are at least two theories about the origin and meaning of the name, both associating it with gold and the gold-mining done in the region. Bulgarian archaeologist Nikolay Ovcharov...

The Basilica of Maxentius and Constantine , sometimes known as the Basilica Nova - meaning "new basilica" - or Basilica of Maxentius, is an ancient building in the Roman Forum, Rome, Italy. It was the largest building in the Forum...

The Basilica Aemilia was a civil basilica in the Roman Forum, in Rome, Italy. Today only the plan and some rebuilt elements can be seen. The Basilica was 100 meters long and about 30 meters wide. Along the sides were two orders of 16...

This video provides an introduction to reaction profiles and explains the concepts of exothermic and endothermic reactions, as well as activation energy. The speaker uses a graphical representation of the energy changes involved in...

The Thracian sanctuary near Tatul Village, Momchilgrad Municipality, is one of the most imposing megalithic monuments discovered on the territory of Bulgaria. It lies just 200 m away from the village and approximately 15 km away from...

Located at the west end of the Imperial Forum in Rome, the Temple of Saturn was originally erected in 497 BC and later rebuilt between 360 and 380 AD. The present ruins represent the third incarnation of the Temple of Saturn, replacing...

The largest and most splendid of Rome's temples, the Temple of Venus and Rome was designed by Hadrian, himself. Although consecrated in AD 121, construction did not begin until about AD 125. The architect was the emperor Hadrian and...

Mycenae, built between two hills, Profitis llias and Sara, dominates the Plain of Argos. According to myth, Mycenae was founded by Perseus, son of Zeus and Danae. In order to build the citadel, Perseus employed the Cyclopes, mythical...

Mycenae, built between two hills, Profitis llias and Sara, dominates the Plain of Argos. According to myth, Mycenae was founded by Perseus, son of Zeus and Danae. In order to build the citadel, Perseus employed the Cyclopes, mythical...

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Long toss for baseball players is a traditional method of building arm strength. But - do you need to do it? Is it required for all pitchers to throw their best and stay healthy? Sometimes, our routines and habits can be crutches...learn...

Mycenae, built between two hills, Profitis llias and Sara, dominates the Plain of Argos. According to myth, Mycenae was founded by Perseus, son of Zeus and Danae. In order to build the citadel, Perseus employed the Cyclopes, mythical...

The new senate house begun by Julius Caesar in 44 B.C., just before his assassination. Work continued under the triumvirs and the building was completed and dedicated in 29 B.C. by Augustus.

The Arch of Titus is a 1st-century AD. located on the Via Sacra, Rome, just to the south-east of the Roman Forum. It was constructed in c. AD. 82 by the Emperor Domitian shortly after the death of his older brother Titus to commemorate...