Answer:
When you put un-like poles together (South facing North) you can feel magnetic attraction. In the Northern Hemisphere, your compass needle points North, but if you think about it for a moment, you will discover that the magnetic pole in the Earth's Northern Hemisphere has to be a South polarity.
The SI base unit for mass is the kilogram (kg), which is defined as the mass of a specific reference object. The gram (g) is a smaller unit of mass, equal to 1/1000 of a kilogram.
The SI base unit for mass is the kilogram (kg). It is defined as the mass of a specific reference object, which was originally one liter of pure water. In May 2019, the definition was changed to be based on fundamental physical constants. The gram (g) is a smaller unit of mass, equal to 1/1000 of a kilogram.
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The first satellite to capture a photograph of Earth from space was Explorer 1, launched on January 31, 1958. This and subsequent space missions like the Apollo program expanded our visual understanding and perception of our planet.
The first satellite to give us a photograph of the Earth from space was Explorer 1, launched on January 31, 1958. Prior to Explorer 1, the Soviet Union had launched Sputnik 1 in October 1957, but Explorer 1 was the first satellite to provide us with images of Earth from space. This marked a significant moment in human history, altering our perception of the planet.
Later on, the Apollo program further improved our visual understanding of Earth, with the Apollo 17 mission capturing the 'Blue Marble' - one of the rare full disk images of the Earth in sunlight. Such images underscored our perception of Earth as a small, yet interconnected and strikingly beautiful, celestial body floating in the vastness of space.
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B) one fixed position pulley attached to a fixed point above the object that is being lifted
C) no pulleys just a string attached to an object that is being lifted
D) one moving pulley attached to the object that is being lifted
Answer;
D) one moving pulley attached to the object that is being lifted
Explanation;
-Pulleys are powerful simple machines. They can change the direction of a force, which can make it much easier for us to move something.
-A fixed pulley consists of a wheel fixed to a shaft and is used in conjunction with a belt to transfer energy to another fixed pulley. A movable pulley consists of a shell, a movable wheel and a rope. Movable pulleys are also know as block and tackle.
-One moving pulley attached to the object that is being lifted decreases the amount of effort force needed to lift an object.
Answer:
The speed is 29.9 m/s
Explanation:
The force created from gravity due to the wagon mass is:
140.55 N pull the wagon down. Two parallel rope with tension of 191N creates 382 N on the wagon. Therefore:
241.45 N force is pulling up the wagon. Then we need to find the acceleration of the wagon under this force:
acceleration is 5.34 m/s^2. The distance is multiplication of acceleration and square of the time.
After 5.6 second the wagon will ride 83.8 m up to hill. And the speed of wagon at that point is: