Answer:
perihelion
Explanation:
The point at which a planet is closest to the sun is called perihelion. The farthest point is called aphelion
Answer:
pha của dao động là hàm bậc nhất của thời gian.
A chemical label should include: a product identifier, signal word, hazard statement, precautionary statement,pictorgrams and supplier information
Explanation:
The product identifier : positioned at the upper left end corner of the label gives the identity of the hazardous chemical by appropriate terms. i.e. the name and code
Signal word: The "Danger" and "WARNING" words. The former is used for a more severe hazard where as the former is for a less severe hazard
Hazard statement : gives a description of the nature and degree of hazard of the chemical
Precautionary statements : Put for workers and users on ways to minimize exposure and lower risks in event of contact with the harmful chemical
Supplier information : It has the chemical manufacturer details such as name, location and telephone number.
Pictograms : Normally symbols with red borders for visual illustration of the hazard chemical.
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Answer:
A. Brahe and Kepler
Explanation:
The Copernican model was a heliocentric model of the universe. Copernicus thought that the Sun is stationary, and the Earth and the other planets are orbiting around it. He also noted that the stars are further away from the Sun compared to the distance between the Earth and the Sun. Three very important hings in his theory are that he thought that the Earth rotates around its own axis, revolves around the Sun, and has annual tilting of its axis. At some things, Copernicus was right with his theory, at some he wasn't, but anyway he made one giant step forward in the understanding of the universe. His theory was supported by many, though mostly after his death, with one of the most noticeable supporters of him being Ticho Brache and Kepler who made model of his theory, as well as improving it.
Answer:
Distance = 4.4 [m]
Explanation:
This problem can be easily solved using a static analysis of forces acting on the ladder, taking into account the respective distances. For easy understanding, a free body diagram should be made.
We perform a sum of force on the X-axis equal to zero, to find that the force exerted by the wall is equal to the friction force on the floor.
Then we perform a summation of forces on the Y axis, to determine that the normal force exerted by the floor is equal to the weight of the ladder.
We know that the friction force is equal to the product of normal force by the coefficient of friction.
In this way, by relating the friction force to the equations deduced above we can find the force exerted by the wall.
Then we make a summation of moments around the base point of the ladder, the equation realized can be seen in the attached image.
In the last analysis we can find the relationship between the horizontal and vertical distance of the ladder, with respect to the wall and the floor.
Then with the complementary analysis of the Pythagorean theorem we can find another additional equation.
The result of the greater distance is 4.4 [m]
