1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Hitman42 [59]
3 years ago
7

Suppose two comets, comet A and comet B, were orbiting the sun, having the same average orbital radii. If comet A had a higher o

rbital eccentricity than comet B, which comet would, during some portion of its orbit, have the lower orbital speed?a. A b. B c. both would be the same d. impossible to tell
Physics
1 answer:
zhannawk [14.2K]3 years ago
3 0

Answer:

a. A

Explanation:

Kepler's First Law says that the orbits of planets are ellipses with the sun at one focus of the ellipse. Moreover, Kepler’s Second Law says that the line joining the planet to the sun sweeps out equal areas in equal times as it moves along its orbit. Finally, Kepler’s Third Law says that the ratio of the squares of the periods for two planets is equal to the ratio of the cubes of their semi-major axes.

By these laws, the comet A will have lower orbital speed.

You might be interested in
A 2.2-kg block slides on a horizontal surface with a speed of v=0.80m/s and an
mina [271]

Answer:

μ = 0.33

Equal to 3.2 m/s²

Explanation:

Draw a free body diagram of the block.  There are three forces:

Normal force N pushing up.

Weight force mg pulling down.

Friction force Nμ pushing opposite the direction of motion.

Sum of forces in the y direction.

∑F = ma

N − mg = 0

N = mg

Sum of forces in the x direction.

∑F = ma

Nμ = ma

Substitute.

mgμ = ma

μ = a/g

μ = (3.2 m/s²) / (9.8 m/s²)

μ = 0.33

As found earlier, the acceleration is a = gμ.  Since g and μ are constant, a is also constant, so it does not change with velocity.

5 0
3 years ago
Which of the following best describes Biology
valkas [14]
A. Is the correct answer.
3 0
3 years ago
Read 2 more answers
Please help me people
saveliy_v [14]

Answer :

(1) The density of asphalt is, 1200kg/m^3

(2) (a) Length, width and thickness of sheet in meter is, 0.35 m, 1.1 m and 0.015 m respectively.

(b) The volume and mass of slab is, 0.005775 m³ and 15.59 kg respectively.

Explanation :

<u>Part 1 :</u>

As we are given:

Mass of block = 90 kg

Volume of block = 0.075m^3

Formula used :

\text{Density of block}=\frac{\text{Mass of block}}{\text{Volume of block}}

Now put all the given values in this formula, we get:

\text{Density of block}=\frac{90kg}{0.075m^3}=1200kg/m^3

Thus, the density of asphalt is, 1200kg/m^3

<u>Part 2(a) :</u>

As we are given that:

Length of aluminium sheet = 35 cm

Width of aluminium sheet = 11 dm

Thickness of aluminium sheet = 15 mm

Now we have to convert these dimensions into meters.

Conversions used:

1 cm = 0.01 m

1 dm = 0.1 m

1 mm = 0.001 m

Length of aluminium sheet = 35 cm = 35 × 0.01 = 0.35 m

Width of aluminium sheet = 11 dm = 11 × 0.1 = 1.1 m

Thickness of aluminium sheet = 15 mm = 15 × 0.001 = 0.015 m

<u>Part 2(b) :</u>

First we have to calculate the volume of aluminium sheet.

Volume of aluminum sheet (cuboid) = Length × Width × Thickness

Volume of aluminum sheet (cuboid) = 0.35 m × 1.1 m × 0.015 m

Volume of aluminum sheet (cuboid) = 0.005775 m³

Now we have to calculate the mass of aluminium sheet.

\text{Density of aluminium}=\frac{\text{Mass of aluminium}}{\text{Volume of aluminium}}

2700kg/m^3=\frac{\text{Mass of aluminium}}{0.005775m^3}

\text{Mass of aluminium}=15.59kg

Thus, the volume and mass of slab is, 0.005775 m³ and 15.59 kg respectively.

7 0
3 years ago
Read 2 more answers
What is the main difference between work power and energy
liubo4ka [24]

Answer:

Work is the energy required to move an object from one point to another. while power is the energy transferred per unit time.

Energy can also be defined as the ability to do work.

6 0
3 years ago
Sleepwalking, night terrors, and restless leg syndrome are all examples of what?
boyakko [2]
Your answer in sleep insomnia, or the inability to affectively sleep
4 0
3 years ago
Other questions:
  • Obviously, we can make rockets to go very fast, but what is a reasonable top speed? assume that a rocket is fired from rest at a
    14·1 answer
  • Makenna surveyed 48 of her female classmates to determine the number of stores each one visited before purchasing a dress for th
    12·2 answers
  • Technician A says that for best results, loosen the fastener immediately after spraying it with penetrating oil. Technician B sa
    13·1 answer
  • A 98.1 kg horizontal circular platform rotates freely with no friction about its center at an initial angular velocity of 1.69 r
    5·1 answer
  • The acceleration due to gravity on the moon is 1.6 m/sec. what does a 10kg mass weigh on the moon
    7·1 answer
  • Doing science by inquiry always involves:​
    15·1 answer
  • Only Wednesdays <br> Pls help
    12·2 answers
  • An eraser is tied to a string swung in a horizontal circle. Identify the type of force which causes this object to travel along
    9·1 answer
  • An accessory such as a coupling that performs a mechanical rather than an electrical function is called?
    7·1 answer
  • A transverse wave on a string is described by the wave functiony(x, t) = 0.350 sin (1.25x + 99.6t)where x and y are in meters an
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!