According to the law of universal gravitation, any two objects are attracted to each other. The strength of the gravitational force depends on the masses of the objects and their distance from each other.

Many stars have planets around them. If there were no gravity attracting a planet to its star, the planet's motion would carry it away from the star. However, when this motion is balanced by the gravitational attraction to the star, the planet orbits the star.

Two solar systems each have a planet the same distance from the star. The planets have the same mass, but Planet A orbits a more massive star than Planet B.


Which of the following statements is true about the planets?
A.
Planet B is more attracted to its star than Planet A.
B.
Planet B will keep orbiting its star longer than Planet A.
C.
Planet A orbits its star faster than Planet B.
D.
Planet A has a longer year than Planet B.

Answer:

C. Plant A orbits its star faster than Plant B

Explanation:

Did it on study island

Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.




Method

Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------



if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee

HELP ASAP PLS


A locomotive with a rocket engine is being tested on a smooth horizontal track. The mass of the

locomotive is unknown. Starting from rest, the engines are fired for 20 s. During this time

they expel 500 kg of oxidized kerosene. The kerosene particles are expelled at an average

velocity of 1200 m/s. At the end of the 20-s period the speed of the locomotive is 50 m/s.

What is its mass?

The Sankey diagram shows the energy transfers in an LED light bulb.

(look at the attached photo)

If energy is used at a rate of 20.0 J/s in an electric
circuit what is the power developed

Need help as fast as possible please
I will mark BRAINLIST only for correct answers babes :)
Thank you!

A skateboarder coasts a distance of 20 meters in 4 seconds. What is the person's speed?

A boat pulls an inner tube behind it using a rope. The rope exerts a force 155 N on the inner tube at an angle of 5.88 above the horizontal. What are the horizontal and vertical components of this force?

Energy in an ecosystem's energy pyramid always flows from __________.

A. decomposers to producers
B. producers to consumers
C. consumers to producers
D. decomposers to consumers

Most houses in the countries that experience winter have air heaters installed.These heaters are usually installed near the floor.Explain why.

8. If Bulb 8 burns out, how will the remaining bulbs be affected?
1
2
3
4
5
6
7
8

A protein-digesting enzyme when mixed with starch solution would
​

An incident ray traveling in a slower medium strikes a boundary with a faster medium. What happens when its angle of incidence is greater than the critical angle?
A.
The refracted ray makes an angle of 90°.
B.
There is total internal reflection in the faster medium.
C.
There is total internal reflection in the slower medium.
D.
The reflected ray makes an angle of 90°.
E.
The reflected ray makes an angle equal to the critical angle.

4. An egg is thrown horizontally off the roof that is 60 meters high, with an initial velocity of
6.5m/s. How long does it take to hit the ground? How far does it go in the x direction?

Question 7 of 10

Which observation is evidence of refraction in this photo?

A. The top of the man's head appears disconnected from the rest of

his head.

B. The man's arm is clearly seen under the water.

C. The snorkel in the man's mouth appears yellow.

a

D. The water in which the man is swimming is transparent.

The combination of all of the forces acting on an object is called the
A) total force.
B) union of forces.
C) super force.
D) net force.

What the energy transformation of an solar panel?

What is the kinetic energy of a 2.1kg baseball and is traveling at 10 m/s?

how gumamela reproduced
​

A saw becomes warm when it is used to cut a log of wood.Give reason​

Rosita started riding her bike 3 km to her friend Gena’s place at exactly the same time Gena started skating to Rosita’s house. Gena, of course, wasn’t home, so Rosita rode back home. The two girls arrived at Rosita’s house at the same time. It took Rosita 30 minutes to ride to Gena’s and back. How fast did Gena skate?

Can someone help with this? (Picture above)

the speed of propagation of seismic waves is about 4km/s an earthquake takes place in Turkey at 13:21:00 the center of the earthquake is at 500km from beirut

at waht time would a seismograph in beiurt rcord the earthquake?​

what do you call a material which is capable of reducing friction when applied between moving parts?​

describe briefly the potential energy it has ( roller coaster)

which of the following instrument measure time most accurately

a pendulum clock

b sundial

c quartz watches

d sand clock​

Why does thunder come before lightning?

1.) A projectile is launched at 32.1 m/s and 52.6 º above the horizontal. Determine the:
a.) Maximum height of the projectile.
b.) The time it takes to reach the maximum height
c.) Time of flight
d.) Range

The type of energy that a moving object has that increases when the speed of that object increases and is called ____.

SOS: I completely forgot what net force is...

What do seismic waves and sound waves have in common?