7
Explanation:The following data were obtained from the question:Mass (m) of box = 100 KgLength (L) of ramp = 4 mHeight (H) of ramp = 1.5 mMechanical advantage (MA) of ramp =? Mechanical advantage of a ramp is simply defined as the ratio of the length of the ramp to the height of the ramp. Mathematically, it is given by:Mechanical Advantage = Lenght / height MA= L/H With the above formula, we can obtain the mechanical advantage of the ramp as follow:Length (L) of ramp = 4 mHeight (H) of ramp = 1.5 mMechanical advantage (MA) of ramp =?MA = 4/1.5MA = 2.7Therefore, the mechanical advantage of the ramp is 2.7
What’s happening to the car’s motion?
A. It did not travel at a constant speed for the entire trip
B. The total time for the car trip was 50 minutes
C. It did not slow down during the trip
D. It returned to where it had started at the end of the trip
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Answer:
It returned to where it had started at the end of the trip
Explanation:
Study the timeline.
A timeline. 4.5 billion years ago, Earth is formed. 4.3 billion years ago, Earliest water. 4.1 billion years ago, Single celled life. 3.5 billion years ago, Earliest oxygen and photosynthesis. 2.5 billion years ago, Complex single celled life. 1.5 billion years ago, Multi cellular life. 500 million years ago, Land life. 300 million years ago, Dinosaurs. 200 million years ago, Mammals. 130 million years ago, Flowers. 5 million years ago, Humans.
Based on the timeline, about how many years ago could the oldest mammalian organism have lived?
5 million years
200 million years
1.5 billion years
4.5 billion years
Based on the timeline, the oldest mammalian organism could have lived 200 million years.
What are the properties of mammalian organism?
The following is a list of distinguishing traits that distinguish mammals from other classes:
Warm-blooded mammals are the only animals that give birth to young.In practically all sorts of ecosystems, they are the most prevalent animal form.Because they have mammary glands, they can make milk to feed their young.existence of the Neocortex area of the brainSebaceous glands and sweat glands are present on their skin (sudoriferous glands).Animals' bodies are covered in hair and fur, which helps them adapt to their surroundings.They are heterodont, meaning they have a variety of teeth.Additionally, mammals have cervical vertebrae.It has a dicondylic skull.Learn more about mammals here:
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Need help!
Describe the moon's position relative to Earth and the sun during full moon, when the moon appears round and bright.
HELLLLLLLLLLLLLLP!!!!!!!!!!!!!!!!!!!!!!!!!!! PLSSSSSSSSSSSSSSSS
Using the slide of the dam as an example, as well as the notes on the slide with the field and tractor, describe the different sphere interactions that are occuing in the picture of THE FARM AND TRACTOR. Be sure to be detailed and explicit (use the dam sample as an example).
Class these in chronological order of appearance in the Universe: hydrogen atom---proton---hydrogen nucleus
Answer: proton, hydrogen nucleus, hydrogen atom
I am not good at mysteries so please help!!
Answer:
It's either the handyman or the cook because the gray line going horizontal can only be one of them, which leaves one to be determined.
Explanation:
If I would to guess I would say the handyman.
When writing a goal it is not necessary to have an end point? Question 4 options: True False
Solid sodium hydroxide (NaOH) is added to a beaker containing distilled water. Which statement below BEST describes the changes that occur after the addition of NaOH?
A. The hydroxyl ion concentration decreases and the pH increases.
B. The hydroxyl ion concentration increases and the pH decreases.
C. The hydronium ion concentration decreases and the pH increases.
D. The hydronium ion concentration increases and the pH decreases.
You can burn fat by all of the following Question 2 options:
A. Walking briskly
B. cycling
C. Swimming
D. All of the above
ANSWER FOR BRAINLIEST
Answer:
D
Explanation:
Your 20-kg brother Mickey is on a see-saw. If you have a mass
of 50-kg and are 2 meters away from the center of the see-
saw, how far out would Mickey have to sit if he wants to apply
the same force onto you that you apply onto him? meters
Answer:
5
Explanation:
To apply the same force as the person, the brother have to sit at a distance of 5 m.
What is meant by torque ?
Torque is defined as the rotational analogue of force. It is the cross product of force and the displacement of the object.
Here,
Mass of the person, m₁ = 50 kg
Mass of the brother, m₂ = 20 kg
Distance of the person, d₁ = 2 m
For the see-saw to get balanced, the torque applied by the two persons each side must be equal.
τ₁ = τ₂
where τ₁ is the torque applied by the person and τ₂ is that applied by the brother.
So, F₁d₁ = F₂d₂
m₁g x d₁ = m₂g x d₂
m₁d₁ = m₂d₂
Therefore, distance of the brother,
d₂ = m₁d₁/m₂
d₂ = 50 x 2/20
d₂ = 5 m
Hence,
To apply the same force as the person, the brother have to sit at a distance of 5 m.
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Isaac Newton believed that light was made of
waves.
particles.
dust.
gravity.
Answer:
I believe the answer is Particles
Explanation:
let me know if i'm wrong
Isaac Newton believed that light was made of particles.
What is light?Light or visible light is electromagnetic radiation that can be perceived by the human eye.Visible light is usually defined as having wavelengths in the range of 400 – 700 nanometers (nm), corresponding to frequencies of 750 – 420 terahertz, between the infrared (with longer wavelengths) and the ultraviolet (with shorter wavelengths)Given is the theory of light by Sir Isaac Newton.
Corpuscular Theory →
According to Newton's corpuscular theory of light, light is composed of very tiny, elastic and rigid particles called corpuscles. When this corpuscles enters into our eye, we get the sensation of light or sensation of vision.Therefore, Isaac Newton believed that light was made of particles.
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PART 2
4. Describe the umpire’s actions for these signals. out - time - Arms are extended above the head, palms out. This position is held until the ump is satisfied that the signal has been seen and observed. safe - Both arms are extended in front of the body, palms down. The position should be held long enough to be seen by players, managers, and other umpires. strike - The right arm and hand are moved outward from the body and at least waist high. walk - ually called vocally
5. What is a designated hitter? Right fist is clenched, arm is raised. everyplayer has to rotate to the hitter position that is the national league. in the american league there are main hitters which has to be listed on the lineup card before the game.
6. What happens when a game is tied at the end of nine innings? if its a tie at the end of nine innings they will add on 2 more innings for over time
Answer:
Explanation:
Ball
There is no signal for a called ball. Instead, simply verbalize the call, "ball". Call the ball while still down, then come up. On ball four, don't point to first base, just say "ball." If the batter doesn't head toward first base, you can simply say to him "that's four."
Strike
Signal strikes with your right hand. Use the traditional clenched fist ("pounding the door"), or signal with your hand/finger shot out to the side. On a called strike, verbalize sharply; everyone should hear. On a swinging strike do not verbalize; simply give the signal.
Safe
Extend both arms together in front of you and then give a quick, sweeping motion outward, roughly parallel to the ground, palms down. On close plays, you can also verbalize the call, "safe", or "he's safe". This helps sell a close call. You can also verbalize information to help sell an extremely close call, things like "Safe - he's under the tag", of "Safe - he pulled his foot." On obvious calls ("stadium calls") don't verbalize the call.
Out
Form a hammer with a clenched right fist and deliver a quick, sharp blow. Some degree of personal style is allowed on the out call, as long you are not distracted from seeing any continuing action. If necessary, verbalize and signal additional information to sell a close call, like "off the bag" or "on the transfer."
Fair Ball
Point the right hand toward fair territory. Never verbalize "fair ball." On a close call, to emphasize the call, stab your arm into fair territory multiple times emphatically.
Foul Ball
The signal for foul ball is the same as for "Time" or other dead ball situation: Raise both hands and call loudly "Foul." Make the call loud and sharp, so everyone hears. Note that, once verbalized, you cannot reverse a call of foul ball.
Play
Point at the pitcher with the right hand with a stabbing motion and call "Play."
You must put the ball back in play following every time the ball goes dead, whether foul ball, hit-by-pitch, called "time", or other reason. When the pitcher has the ball and is ready (he must have engaged the rubber), and the catcher is in the catcher's box and is also ready, point and call "play". Under no circumstances should you allow the pitcher to go into his windup until you have called "Play".
Time
Raise both hands and call "Time" in a loud voice. Make the call loud and sharp. It is essential that everyone on the field hear you.
Important: When any umpire calls "Time," all other umpires should echo the call by also signaling and, if there is play in progress, also verbalizing "Time."
time
(Time with a small "t"). There are occasions when time is out, but "Time" has not been called. An example is when the pitcher is ready but the batter is not yet set; in this case, the plate umpire might put up his hand as a stop sign to the pitcher, signaling him to wait. It is important to understand that when you put up a stop sign like that you have called time. So you must put the ball back in play.
Important: Be very careful with this small-"t" Time. Be certain, for example, that all continuous play has come to a stop, that runners are back to their bases, and that no sudden actions are imminent. You're in a world of hurt if you've got a hand up signaling time, just as a runner breaks and a bang-bang play develops, an overthrow occurs, a run scores, and THEN you have to get everyone's attention to bring it all back.
The count
Indicate pitch count using the left hand for balls and the right hand for strikes. On fields that do not have scoreboards, give the count frequently; always give the count on an "action" pitch (with three balls and/or two strikes). Call the count loudly, so both benches (and base coaches) can hear it clearly. Finally, don't abbreviate the count by verbalizing things like "twenty-two" for two and two, or saying "full count" when the count is three and two.
3rd strike not
caught
Give the strike sign, but do not call or signal the batter out. Instead, clear the catcher and give the safe sign.
Describe what happens to visible light when it hits a surface? What happens to light as it passes through a material?
Describe the relationship between wavelength, frequency, and energy in electromagnetic waves. Which waves are the most dangerous?
Iguanas need to live in a habitat that is very warm, so the pet store warms their enclosures with “basking lights” which act as an artificial sun. Describe how the three methods of thermal energy transfer may take place within the iguana’s enclosure.
(ANSWER ALL QUESTIONS PLEASE!)
Answer:
1 question- Three different things happen when light hits a surface, it can be reflected (bounce off), absorbed or transmitted (pass through). Glass reflects some light but most of the light is transmitted straight through. That's why we can see objects on the other side of a closed window. We say that glass is transparent.
2 question- All materials have what is known as an index of refraction, which is linked to how fast light can travel through the material. As light passes through air and into another clear material (such as glass), it changes speed, and light is both reflected and refracted by the glass
3 question- The energy of a wave is directly proportional to its frequency, but inversely proportional to its wavelength. In other words, the greater the energy, the larger the frequency and the shorter (smaller) the wavelength
4 question- The most dangerous frequencies of electromagnetic energy are X-rays, gamma rays, ultraviolet light and microwaves. X-rays, gamma rays and UV light can damage living tissues, and microwaves can cook them
5 question- Heat can travel from one place to another in three ways: Conduction, Convection and Radiation. Both conduction and convection require matter to transfer heat. Conduction is the transfer of heat between substances that are in direct contact with each other. Thermal energy is transferred from hot places to cold places by convection. Radiation is a method of heat transfer that does not rely upon any contact between the heat source and the heated object as is the case with conduction and convection. Heat can be transmitted through empty space by thermal radiation often called infrared radiation.
I hope this helps!
Answer: Three different things happen when light hits a surface, it can be reflected (bounce off), absorbed or transmitted (pass through). Glass reflects some light but most of the light is transmitted straight through. That's why we can see objects on the other side of a closed window. We say that glass is transparent. All materials have what is known as an index of refraction, which is linked to how fast light can travel through the material. As light passes through air and into another clear material (such as glass), it changes speed, and light is both reflected and refracted by the glass.
Explanation:
List the Layers of Earth in order from Thickest to thinnest using the Data table on the Earth’s interior: (Combine numbers for Lower and Upper Mantle
)1.________________________________________________________________2. ________________________________________________________________3. ________________________________________________________________4. ________________________________________________________________
Answer:
Crust, Mantle, Outer Core, Inner Core
I hope this helped! :))
On planet Earth, which of these measurements would be the same for an object?
A. Mass and Density B. Density and Volume
C. Mass and Weight D. Weight and Volume
Answer:
a
Explanation:
a is he answers . mass and density
Compare the pressure at a depth of 10 m to a depth of 2,000 m below the surface of the ocean. Explain the difference in pressure
Answer:
you still there?
Explanation:
Decreasing the mass or the speed of the cart? HELP QUICK
Question 1 options:
Kinetic energy is least as you are moving past the bottom of the swing and going back up to the highest point
Kinetic energy is least at the lowest point of your swing when you are closest to the ground
Kinetic energy is the least when you are halfway between the highest point of the swing and the bottom
Kinetic energy is least at the at the top of the swing when you are still for a moment just before falling again
Answer:
Kinetic energy is least at the at the top of the swing when you are still for a moment just before falling again
Explanation:
Only 5 question plz answer
How you can prevent thermal energy from moving by conduction, convection, and radiation?
Answer:
Using insulating materials is the best way to prevent heat transfer by conduction and convection. Insulating materials are poor conductors of thermal energy and also limit the movement of air in spaces, reducing convection. Insulation slows the rate at which unwanted energy enters the home in the summer.
Explanation:
Easy peasy.
One can prevent thermal energy from moving by conduction, convection, and radiation by using insulating material.
What is thermal energy?Thermal energy refers to the energy contained within a system that is responsible for its temperature. Heat is the flow of thermal energy.
What is conduction?Conduction is the process by which heat energy is transmitted through collisions between neighboring atoms or molecules.
What is convection?Convection (or convective heat transfer) is the transfer of heat from one place to another due to the movement of fluid.
What is radiation?Radiation is the emission or transmission of energy in the form of waves or particles through space or through a material medium.
What is insulating material?There are two types of insulating materials: radiant barriers and reflective insulation systems.
Insulating materials are poor conductors of thermal energy and also limit the movement of air in spaces, reducing convection.
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Shanika is an engineer at an amusement park who is experimenting with changes to the setup for a magnetic roller coaster ride. In one ride, there are two identical roller coaster cars (orange and green) that start on opposite sides of a large magnet located at the center of a station. Shanika wants to get the largest increase in potential energy she can by moving one car one space to the left or the right.
Shanika can move the orange car to point A or point B, or she can move the green car to point C or point D. Which movement should she make? Why will that movement result in the largest increase in potential energy? Describe the magnetic force that will act on the roller coaster car she moves.
They should go forward, D
Physical properties of matter can be tested, measured, or observed. Which of the following describes the physical properties of a wood block? *
a solid that sinks in water and is magnetic
b liquid that floats in water and is not magnetic
c solid that floats in water and is not magnetic
Answer:
the answer is c if not then a hope this helps but i would try c first sorry if i get this wrong don't come at me.
Explanation:
Water has many properties important to life. The following are all properties exhibited by water. Which one is NOT due to the polar nature of water molecules?
A. clarity
B. adhesion
C. cohesion
D. viscosity
Answer:
B
Explanation:
Only 4 questions plz answer
Answer:
For your first question, it is C.
For your second question, it is A.
For your third question, it is A, again.
For your final question, it is B.
Have a wonderful day! :D
Answer:
Once the glaciers melted, the dirt, rocks, and sand (known as glacial till) that were picked up by the ice were all that was left behind. This till filled any hills or valleys that previously existed, leaving the land flat. ... The glaciers of the last ice age did not extend to southern Indiana.
Explanation:
Which statement best describes a difference between electromagnetic waves and mechanical waves?
What does relative humidity measure?
the amount of water in cirrus clouds
the amount of water that has evaporated into the air
the amount of frozen water that has condensed from the air
the amount of water vapor in the air compared to the amount the air can hold
Answer:
It is D
Explanation:
edge unit test review thing
Relative humidity measures the amount of water vapor in the air compared to the amount the air can hold at a specific temperature. The correct option is option (4).
It is a measurement of the moisture content in the air relative to its capacity to hold moisture.
The relative humidity is expressed as a percentage and indicates how close the air is to being saturated with water vapor. A higher relative humidity value means that the air contains a larger amount of water vapor compared to its capacity at that temperature.
Therefore, It is important to note that relative humidity is not a direct measure of the amount of water in specific cloud types or the amount of frozen water that has condensed from the air. The correct option is option (4).
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what is Aristotle famous for?
Answer:
History
Explanation:
Im. Sorry. Im. Not. Much. Help
True or False: To find an object's acceleration you have to have a time, an initial (beginning) speed, and a final speed.
Answer: true
Explanation:
Which object has a volume greater than the volume of a pencil? *
a notebook
b paperclip
c penny
Answer:
A.
Explanation:
Object has a volume greater than the volume of a pencil is notebook.
What is volume?Volume is a three-dimensional measurement that's used to gauge a solid shape's capacity. It implies that the volume of a closed form determines how much space it may occupy in three dimensions.
Given notebook, paperclip, penny, object has a volume greater than the volume of a pencil is notebook.
Object has a volume greater than the volume of a pencil is notebook.
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Dominant alleles are almost always represented with the uppercase form of a letter. True or false?
Answer:
True
Explanation:
Dominant alleles are always represented with uppercase letters
Stamina is a measurement of how long you can do an activity? Question 4 options: True False
Answer:
True
Explanation: