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3 years ago

Kepler modified Copernicus's model of the universe by proposing that the

Physics

1 answer:

satela [25.4K]3 years ago

6 0

Answer:

A. paths of the planets follow an elliptical orbit around the sun.

Explanation:

Nicolás Copernicus formulated the heliocentric theory of the solar system, where the Sun is the one in the center with the planets moving around it, contradicting what was believed for the time that it was that the Earth was in the center and both the Sun and the planets revolved around him (geocentrism).

This was the basis for Kepler finally describing the planetary movement based on 3 mathematical expressions. These expressions start by saying that the orbits were not circular, if not elliptical, so that the planets are governed by the Pythagorean laws of harmony. His studies showed that the distances of the planets to the Sun drew parallel spheres, being the first to draw the concentric orbits of the planets in their orbits around the Sun.

Kepler's laws are the following:

- First law. The planets move in elliptical orbits, the sun being one of the foci.

- Second law. The radius vector that joins the center of the Sun with the center of a planet describes equal areas in equal times.

- Third law. The squares of the periods of the planets are proportional to the cubes of their distance from the Sun.

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The current through each resistor in the two-resistor circuit is _________ the current through the resistor in the one-resistor

poizon [28]

Answer:

Serial circuit. the current is constant.

the voltage across a given resistor is half the rating in a one-resistor circuit.

Parallel circuit the voltage is constant

the current is half the value of the current with a single resistor

Explanation:

To answer exactly this exercise, you need the diagram or the indication of the type of circuit being used, since there are two possibilities, let's consider the results of each one.

Serial circuit.

The two resistance are one after the other.

In this case the current in the resistor sides is the same, that is, the current is constant in the circuit.

The voltage is proportional to the value of each resistor and if the two resistors are equal, the voltage across a given resistor is half the rating in a one-resistor circuit.

Parallel circuit

the two resistance is next to each other.

In this case the voltage is constant, that is, the voltage across the two resistors is the same as in the case of a single resistor.

The current is inversely proportional to the value of the resistance

i₁ = V / R₁

i₂ = V / R₂

for a single resistance

I = V / R

these currents are related

i = i₁ + i₂

if the two resistors have the same value the current is half the value of the current with a single resistor

7 0

2 years ago

Distinguish between constructive interference and destructive interference.

TEA [102]

construction interference is when you build things up and destructive interference is when you tear things down

5 0

3 years ago

If you seal a container of air at room temperature (20.0 degrees celcius) and then put it in the refrigerator (2.00 degrees celc

zheka24 [161]

The pressure inside the container will be 9.39×10⁴Pa

At constant volume, the pressure in a container is directly proportional to its absolute temperature.

If air in a container is sealed at 20⁰C at a pressure equal to the atmospheric pressure and cooled to 2.00⁰C, the pressure inside the container falls.

Convert the temperature in Celsius to Kelvin.

$T_1=20.0^oC+273.15=293.15K\\T_2=2.00^oC+273.15=275.15K$

Use the expression for the pressure law.

$\frac{P_2}{P_1} =\frac{T_2}{T_1}$

Substitute 100,000 Pa for P₁, 293.16 K for T₁ and 275.15K for T₂.

$\frac{P_2}{P_1} =\frac{T_2}{T_1}\\ P_2=P_1(\frac{T_2}{T_1})\\ =(100,000Pa)(\frac{275.15K}{293.15K} )\\ =9.386*10^4Pa$

The pressure in the container (correct to 2 sf) is 9.39×10⁴Pa

6 0

2 years ago

A diver runs horizontally with a speed of 1.20 m/s off a platform that is 10.0 m above the water. What is his speed just before

DENIUS [597]

Answer:

14.05m/s

Explanation:

We are given that

Horizontal speed of diver= $v_x=1.2m/s$

Distance, y=-10 m

It is taken as negative because the diver goes downward.

There is no air resistance therefore, there is acceleration due to gravity .

We know that

$g=-9.8 m/s^2$

Initial vertical velocity, $u_y=0$

$v^2-u^2=2as$

Using the formula

$v^2_y-0=2\times (-9.8)(-10)$

$v_y=\sqrt{2(-9.8)(-10)}$

$v_y=14 m/s$

$v=\sqrt{v^2_x+v^2_y}$

Using the formula

$v=\sqrt{(1.2)^2+(14)^2}=14.05m/s$

Hence, the speed of diver before just striking the water=14.05m/s

4 0

3 years ago

The force that moves fluid out of capillaries is ________ pressure whereas the opposing force that moves fluid into capillaries

konstantin123 [22]

Answer:

hydrostatic; colloid osmotic

Explanation:

Hydrostatic pressure, due to the force of gravity, is the pressure exerted by a liquid at an equilibrium point inside the fluid.

Due to the increasing weight of the water exerting downward force from above, hydrostatic pressure increases in proportion to the distance measured from the surface.

Oncotic pressure, or colloid osmotic pressure, is a type of protein-induced osmotic pressure, especially albumin, in the plasma (blood / liquid) of a blood vessel which displaces water molecules, causing a relative molecular water deficit with water molecules moving back into the circulatory system within the capillary end of the lower venous pressure.

3 0

3 years ago