Kepler found that the orbits of the planets were _____. circular amorphous oval elliptical

Answers

Answer 1

Answer:

Answer:

elliptical

Explanation:

Nicolaus Copernicus gave the heliocentric theory that sun is at the center if the solar system and all the planets and the moons revolved wound it. according to him, the planets revolved around the sun in circular paths.

But Kepler suggested a different shape of the orbit. According to the laws o planetary motion given by Kepler, the planets revolve around the sun in an elliptical orbit. The sun is at one of its focus.

Answer 2

Answer: Kepler found that the orbits of the planets were elliptical.
His work was so convincing that to this day, they still are.

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What is the total number of orbitals containing only one electron in an atom of nitrogen in the ground state?1
2
3
4

Answers

Answer: 3

Explanation:

Nitrogen is in subshell p which can only hold 6 electrons, therefore, it has three orbitals. Since Nitrogen has three electrons in this subshell, only one electron is in each orbital.

c is the answer. nitrogen is in subshell p and this subshell can hold 6 electrons therefore it has 3 orbitals. since nitrogen has three electrons in this subshell, only 1 electron is in each shell. hope that helps.

Air has weight.
a. True
b. False

Answers

Air is a combination of gases, gases do have a mass/weight.

so basically yes air does have weight

A motor with a power of 7.0 × 104 watts lifts a loaded elevator to a height of 20.00 meters for 40 seconds. What is the force exerted by the motor on the elevator?

Answers

Answer:

$1.4\cdot 10^5 N$

Explanation:

First of all, we can find the work done as follows:

$W=Pt$

where P is the power and t is the time taken. In this problem, $P=7.0\cdot 10^4 W$ and $t=40 s$ , so the work done is

$W=Pt=(7.0\cdot 10^4 W)(40 s)=2.8\cdot 10^6 J$

The work done is equal to the force applied F times the displacement d:

$W=Fd$

since we know d=20.0 meters, we can re-arrange the equation to find the force exerted:

$F=(W)/(d)=(2.8\cdot 10^6 J)/(20.0 m)=1.4\cdot 10^5 N$

Answer:

C) 1.4 × 105 newtons

Explanation:

Correct answer on plato/edmentum

A hailstone traveling with a velocity of 43 meters/second comes to a virtual stop 0.28 seconds after hitting water. What is the magnitude of its acceleration in the water?A. 12 meters/second2
B. 1.5 × 102 meters/second2
C. 78.6 meters/second2
D. 6.5 × 10-3 meters/second2

Answers

Magnitude of acceleration = (change in speed) / (time for the change) .

Change in speed = (ending speed) - (starting speed)

= zero    - (43 m/s)

=    -43 m/s .

Magnitude of acceleration = (-43 m/sec) / (0.28 sec)

      = (-43 / 0.28) (m/sec) / sec

      =    153.57... m/s²

      = 1.5... x 10² m/s² .

Answer:

1.5*10^2 meters/seconds^2

Explanation:

I got 100% on my test

Which of the following is an example of an object that could have a net force greater than zero acting on it?A. a glass resting on a table
B. a ball rolling down a ramp
C. a ladder leaning against a wall
D. a toy car moving east at a constant velocity

Answers

Net force is basically the force an object has when changing direction, so the answer would be D.

An object could have a net force greater than zero acting on it is a toy car moving east at a constant velocity because of the direction it moves.

What is the law of inertia?

Answers

Inertia: Objects tend to move at the same speed and direction or, if at rest, stay at rest. A force has to be applied to overcome inertia. An objects inertia is determined by the mass of the object.

Answer:

The law of inertia is mostly known the same as THE NEWTONS FIRST LAW OF MOTION which states that"A body will continue to its state of rest or motion unless acted by an external forces"

●WHAT IS INERTIA?

Inertia is the ability of a body at rest to resist motion or a body in motion to resist resting unless acted by external forces.

△TYPES OF INERTIA

■There are 3 types of inertia,

◎Inertia of rest

◎Inertia of direction

◎Inertia of motion

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