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3 years ago

He discovered that the orbits of planets are ellipses.

Physics

2 answers:

bezimeni [28]3 years ago

6 0

Answer:

Kepler

Explanation:

Kepler discovered that the orbits of planets are ellipses.

Alenkinab [10]3 years ago

6 0

<em>Johannes Kepler</em>, the Polish mathematician, discovered that the planetary orbits ARE most likely ellipses.

Isaac Newton, the English Physicist/mathematician, discovered that the planetary orbits HAVE TO BE ellipses.

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2) Why do satelites not<br> Fall while revolving<br> around the earth?

MrRissso [65]

Answer:

Because they are moving to fast for Earth's gravity to pull it down.

7 0

3 years ago

A circuit is supplied with 30 volts and the total circuit resistance is 3 kΩ. What's the current flowing through the circuit?

Daniel [21]

Answer: The current flowing through the circuit is 0.01A (or 10 mA)

Explanation:

Use Ohm's Law:

$I=\frac{U}{R}$

Given the values of U=30V and R=3000Ohm:

$I=\frac{30 V}{3000 \Omega}=0.01A=10mA$

4 0

3 years ago

An insoluble solid material that is produced in double replacement reactions is called

lina2011 [118]

Answer:

Precipitate

Explanation:

When a double displacement reaction occurs, the cations and anions switch partners, resulting in the formation of two new ionic compounds AD and CB, one of products is in the solid state and forms an insoluble ionic compound called a precipitate.

4 0

3 years ago

a golfer is on the edge of a 12.5m bluff overlooking the 18th hole which is located 67.1m from the base of the bluff. she launch

Alja [10]

Answer: $26.359 m/s$

Explanation:

This problem is related to parabolic motion and can be solved by the following equations:

$x=V_{o}cos \theta t$ (1)

$y=y_{o}+V_{o} sin \theta t - \frac{1}{2}gt^{2}$ (2)

$V=V_{o}-gt$ (3)

Where:

$x=67.1 m$ is the horizontal distance traveled by the golf ball

$V_{o}$ is the golf ball's initial velocity

$\theta=0\°$ is the angle (it was a horizontal shot)

$t$ is the time

$y=0 m$ is the final height of the ball

$y_{o}=12.5 m$ is the initial height of the ball

$g=9.8 m/s^{2}$ is the acceleration due gravity

$V$ is the final velocity of the ball

Let's begin by finding $t$ from (2):

$t=\sqrt{\frac{2 y_{o}}{g}}$ (4)

$t=\sqrt{\frac{2 (12.5 m)}{9.8 m/s^{2}}}$ (5)

$t=1.597 s$ (6)

Substituting (6) in (1):

$67.1 m=V_{o} cos(0\°) 1.597 s$ (7)

Finding $V_{o}$ :

$V_{o}=42.01 m/s$ (8)

Substituting $V_{o}$ in (3):

$V=42.01 m/s-(9.8 m/s^{2})(1.597 s)$ (9)

Finally:

$V=26.359 m/s$

6 0

3 years ago

One race car has a higher acceleration than a second race car. But the second race car can reach a higher top speed than the fir

Ostrovityanka [42]

This can happen because speed has nothing to do with something’s top speed. Acceleration is how quickly something can reach its top speed. The top speed of something is not determined by the rate it accelerates.

7 0

3 years ago