Kepler discovered that planets move faster when they are closer to the sun. Which scientist discovered the reason they move faster?a. Brahe
b. Copernicus
c. Newton
d. Ptolemy
Answers
Answer;
C. Newton
Explanation;
- According to Kepler, the orbital speed of a planet varies, depending on its distance from the Sun. The closer a planet is to the Sun, the stronger the Sun’s gravitational pull on it, and the faster the planet moves. The farther it is from the Sun, the weaker the Sun’s gravitational pull, and the slower it moves in its orbit.
- While thinking on Kepler's laws, Newton realized that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles.
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A car starts from a stopped position and speeds up to 60 m/s in 4.4 seconds. How quickly is it accelerating?
Gaya 7,5 dikerjakan pada masa sebesar 3 kg sehingga kelajuannya berubah dari 65 cm/s menjadi 15 m/s maka waktu yang dibutuhkan adalah
A scientist on Earth drops a hammer and a feather at the same time, and an astronaut on the moon drops a hammer and a feather. Which statement is true? a) The feather falls faster on Earth. b) The hammer falls faster on the moon. c) The feather falls faster on the moon. d) The hammer and feather fall at the same rate on the moon.
At what time of day would you be most likely to find that the air over water is significantly warmer than the air over land nearby?
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Answer: Valid.
Explanation: Since it provides consistent results, it is a good measure to bas a hypothesis or conclusion on.
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Final answer:
The rate at which electrical energy is converted to another form of energy is called power.
Explanation:
In an electric circuit, electrical energy is continuously converted into other forms of energy. For example, when a current flows in a conductor, electrical energy is converted into thermal energy within the conductor. This process is called power. Power is the rate at which energy is transferred or work is done, and is measured in watts.
Learn more about Power here:
#SPJ6
b. commutator.
c. brush spring.
d. relay.
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Answer: The slope of a line on a distance-time graph is- speed of the object.
The slope of a line on a graph refers to rate of change of variable that is presented on Y axis with respect to the variable that is presented on X axis.
For a distance time graph, distance is presented on Y axis and time on the X axis.
As we know that
Therefore, the slope of a line on a distance-time graph represents speed of the object.
Slope of any given curve is defined as
Rate of change in quantity on Y axis with respect to the quantity on x axis.
Here on Y axis if we plot distance and on X axis if time is plotted then
Slope = [tex] \frac{ds}{dt}[/tex}
above expression is rate of change in distance with time which shows apped of object
Answers
Data;
- Power = 1200W
- Time/day = 10 mins
Power
The is the rate of energy used to time. It is the measure of expedience of energy.
a). How many minutes is the dryer used in a month.
Assuming there 30 days in a month;
This shows that the dryer is used 300 minutes in a month.
b). How many hours is the dryer used in a month.
To solve this problem, we simply need to convert the value of (a) from minutes to hours.
The dryer was used for a total of 5 hours in a month.
c). The power of the dryer in kilowatt.
To convert the power in watt to kilowatt, we divide by 1000.
The power in kilowatt is 1.2kw
d). How many kilowatt/hr of electricity used in a month.
The dryer consumes 6kw/h in a month.
e). If the town charges $0.15/kwh, the cost in a month
The cost of the dryer in a month is $0.9.
Learn more on power here;
5 hours
1.2 killowatt
6 killowatt hour
6*0.15=0.9
$0.9