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allochka39001 [22]
4 years ago
5

HEY CAN ANYONE PLS ANSWER THESE QUESTION!!!!!

Physics
1 answer:
Pie4 years ago
5 0

1. A model can come in many shapes, sizes, and styles.

✅

2. Models can help scientists communicate their ideas, understand processes, and make predictions.

✅

3. Thomson's experiments with cathode ray tubes showed that all atoms contain tiny negatively charged subatomic particles or electrons.

✅

4. The plum pudding model has electrons surrounded by a volume of positive charge

✅

5. Electrons are kept in the orbit around the nucleus by the electromagnetic         force.

IamSugarbee

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A plane takes off in san francisco at noon and flies toward the southeast. an hour later, it is 400 kilometers east and 300 kilo
eduard
This first step involves a right triangle. If the plane is 400 km east and 300 km south of the origin, and it flew in a straight line, then you can construct a right triangle with side lengths 300, 400, and c. You may recognize that these are multiples of the Pythagorean triple 3, 4, 5, so the side length c is 500 km. Otherwise, you would write 
c^2 = 300^2+400^2 \\ c = 500. 

This second step is, if I am correctly interpreting "degrees south of east," to find the angle formed by the horizontal line representing the east and the path of the plane. I made a diagram that does just that (see attached). You can use a trig function of one of the angles to solve. I chose
tan(C)= \frac{3}{4}  \\  arctan( \frac{3}{4})=36.870. Thus, I believe it is 37° south of east.

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3 years ago
A person drives 70 km/h in 1 hour to the east, then 80 km/h for another hour to the east. What
andre [41]

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