Why does time only move forward?
What two gases in the atmosphere do animals and plants need to breathe and grow?
Answer: Explanation:
Plants and animals each produce the gases that the other needs to live. Plants need carbon dioxide—people and other animals exhale carbon dioxide as a waste product. People and other animals need oxygen—plants produce oxygen during an important process called photosynthesis, which turns the sun's energy into nutrients.
Which of the following statements is true?
A. A golf ball has a larger volume than a baseball.
B. Most of the substances found on Earth are compounds.
C. Water (H 2O) is an element.
D. Water has a pH value of 0.
Answer:
B.
Explanation:
Most substances found in nature, wood, soil and rocks, are mixtures of chemical compounds.
Which types of electromagnetic waves are most likely to cause atoms and
molecules in the human body to ionize?
A. Infrared and radio
B. X-rays and gamma rays
C. Ultraviolet and infrared
D. Gamma rays and microwaves
Plz help fast
Answer: Its B
Explanation:
Answer:
B
Explanation:
The bottom wave has a greater _____
(1 point)
amplitude.
frequency.
trough.
wavelength.
Answer: hope this helps ♡
The bottom wave has a greater frequency.
Explanation:
1. Waves with a low frequency have a longer wavelength.
2. Waves with a high/great frequency have a shorter wavelength.
The bottom wave has a greater frequency. So, the second option is correct.
What is meant by frequency of a wave ?Frequency of a wave is defined as the number of oscillations the wave completes in one second.
Here,
The diagrams of two waves are represented. The propagation of wave from the time zero to one second is given.
From the first diagram,
The wave is travelling from point a at t = 0 and reached at the point b at t = 1 s. This means in a time duration of 1 second, it has travelled a distance ab from a to b. The time taken for one oscillation to complete is called the time period. In the diagram, the number of waves passing in one seconds can be calculated. A few number of waves passed in one second.
From the second diagram,
The wave is travelling from the point a to point b in a time duration of one second. When compared to the top wave, the time taken for one wave to complete is lesser for the bottom wave. That means the time period is lesser than the top wave. In the diagram, it can be seen that, the number waves that has been completed in the one second is very high compared to that of the top wave. That means the bottom wave has higher frequency than that of the top wave.
Hence,
The bottom wave has a greater frequency.
To learn more about frequency of waves, click:
https://brainly.com/question/29739263
#SPJ2
According to the lesson, describe in detail how you would use a triple beam balance to obtain the mass of an apple.
( Put it into your words so that you can fully understand it using 2 to 3 sentences.)
So, there are three different values on a triple beam balance; There is hundreds, tens, and units. To find the weight of an apple you move the markers until it is balanced. Say that the apple weighs one hundred-fifty-seven gram, you would first move the hundreds marker to the number one hundred. Then you would move the tens marker to fifty. Last, you would move the unit marker to seven.
Answer:
To find out the weight of the object, you’ll need to slide the weight poises until the pointer is at zero again. Start with the two heavier weight poises and then use the lightest one to do the fine tuning. The HST triple beam balance and the Ohaus model are accurate to 0.1 grams.
Explanation:
Visible light is the smallest band in the electromagnetic spectrum true or false.
Unbalanced forces
A.
maintain the constant motion of an object.
B.
cause the motion of an object to change.
C.
can change an object's speed but not direction.
D.
make an object move opposite the applied force.
Answer:
the answer is B.
Explanation:
unbalanced force means unequal force when two personas are pushing an object on opposite sides, more force than the other. Unbalanced force DOES NOT mean 'constant'. Balanced forces are what's constant. It can cause a change in motion (in general), meaning that it can change an objects speed AND direction, not just speed, or moving it to the opposite side.
Unbalanced forces cause the motion of an object to change. Therefore, option (B) is correct.
What are balanced and unbalanced forces?Unbalanced forces can be described as when the resultant force acting on a body is not equal to zero. The body exerted upon by unbalanced forces can change its state of motion.
For example, the same tug-of-war example of the Unbalanced forces. When the forces on both sides are balanced but if the rope moves away in a particular direction then the forces applied by both teams are unbalanced.
Balanced forces can be described as if the resultant force of all the forces acting on a body sums up to zero. For example, you are pushing a wall and the wall does not move and neither do you so they are balanced forces.
Therefore, on the application of Unbalanced forces, the object can get change its motion.
Learn more about Unbalanced forces, here:
https://brainly.com/question/
#SPJ2
Using the formula for work, Match the Force × Distance problems with their correct "Work Performed" answer. The first example has been completed for you.
Force × Distance = Work Performed
10 newtons 6 meters =60 Nm
1. 62 Nm
40 pounds 100 feet
2. 4000ft.-lbs.
2.5 pounds 24 inches
3. 5 ft.-lbs
62 newtons 1 meter
4. 200ft.-lbs.
1 ton 20 feet
5. 40,000 ft.-lbs.
400 pounds 0.5 feet
This is a science question
The air currents across the continents would determine the distribution of the air.
What are air currents?Air currents across the continents are primarily driven by temperature differences and the rotation of the Earth. The warm air near the equator rises and flows towards the poles, while the cooler air near the poles sinks and flows towards the equator.
This creates large-scale circulation patterns known as Hadley cells, Ferrell cells, and Polar cells. These cells are responsible for the trade winds, westerlies, and easterlies, respectively. Additionally, there are also local winds caused by differences in terrain, such as sea breezes and valley breezes.
Learn more about air currents:https://brainly.com/question/4134845
#SPJ1
What would happen to the digestion process if enzymes were not present
Answer: It would take 2.3 billion years for the biological reaction without the presence of enzymes. It’s because, without them, your body can’t break down foods so that nutrients can be fully absorbed. Every organ, every tissue, and every 100 trillion cells in our body rely upon the reaction of metabolic enzymes and their energy component.
Explanation:
I hope this helps
Which has a higher density? Helium or air?
Air
Explanation:In the case of your helium balloon, it most likely floated away before you could catch it because helium is much lighter (or less dense) than the air in our environment.
Roger Federer serves a tennis ball with a velocity of 35.0 m/s. If the ball has a mass of 0.15 kg, what is the kinetic energy (KE) of the ball?
can you please help me
Answer: Truck escape ramps are used as a traffic tool on steep, sustained grades to check high vehicle speeds in emergencies. The ramps use a combination of momentum-halting media like gravel or sand and an incline to bring runaway vehicles to a halt.
Explanation:
Therefore, the answer is 3.
How do atoms form a new substance? by gaining electrons from each other by losing electrons by losing neutrons to each other by sharing electrons with each other
(SCIENCE 8TH GRADE MIDDLE SCHOOL)
Answer:
A produces new substances by changing the way in which atoms are arranged. In a chemical reaction, bonds between atoms are broken and new bonds form between different atoms. This breaking and forming of bonds takes place when particles of the original materials collide with one another.
Answer:
When atoms combine to form a new substance, they are forming chemical bonds that bind them together. It is these bonds that define what is formed. ... A molecule is formed when two or more atoms join together chemically. If atoms combine that are of two or more different elements, we call that a compound
Explanation:
Objects in our solar system, including planets and their moons, stay in orbit because of gravity and inertia. Draw a model to show how each factor contributes to the orbits of a planet and a moon orbiting that planet. Include the following in your model:
Labeled arrows to represent gravity and inertia
The paths the planet and the moon take during their orbits
A brief summary of your model
Answer:
In this model, the planet and its moon are shown in orbit around the sun. The arrows labeled “gravity” indicate the force of gravity exerted by the sun on the planet and its moon, causing them to be pulled around the sun.
What is the model?
Generally, The arrows labeled “inertia” indicate the momentum that keeps the planet and its moon in orbit, once they have been set in motion. The path of the planet is shown as a larger, more circular orbit, while the path of the moon is shown as a smaller, more elliptical orbit.
In summary, gravity pulls the planet and its moon around the sun, while inertia keeps them in motion and on their paths. The force of gravity is stronger on the planet than on the moon, which is why the planet’s orbit is larger and more circular. The moon’s orbit is smaller and more elliptical, due to its weaker gravity pull.
Together, gravity and inertia keep the planet and its moon in orbit around the sun.
hope this is correct have a good one
Explanation:
help me please 35 points and mark brainliest
1. The kinetic energy of the truck is 1959940.8 J
2. The kinetic energy of the car is 463037.04 J
1. How do i determine the kinetic energy of the truck?The kinetic energy of the 6000 Kg truck can be obtained as follow:
Mass of truck (m) = 6000 KgVelocity of truck (v) = 92 Km/h = 92 / 3.6 = 25.56 m/sKinetic energy of truck (KE) =?KE = ½mv²
KE = ½ × 6000 × 25.56²
KE = 1959940.8 J
Thus, the kinetic energy is 1959940.8 J
2. How do i determine the kinetic energy of the car?The kinetic energy of the 6000 Kg truck can be obtained as follow:
Mass of car (m) = 1200 KgVelocity of truck (v) = 100 Km/h = 100 / 3.6 = 27.78 m/sKinetic energy of car (KE) =?KE = ½mv²
KE = ½ × 1200 × 27.78²
KE = 463037.04 J
Thus, the kinetic energy is 463037.04 J
Learn more about kinetic energy:
https://brainly.com/question/25959744
#SPJ1
Why are physicists hired to work at car companies?
Answer:they can calculate the impact the car can have in certain types of crashes and create The safest ways to dissipate the crashes energy away from the driver and they can use air resistance to create a more fuel efficient and faster car
Explanation:
A meteor falls toward Earth's surface. Given that the acceleration due to
gravity is 9.8 m/s^2, what is the meteor's potential energy if it has a mass of 10
kg at an altitude of 400 m?
O A. 408 J
O B. 7,840,000 J
O C. 2J
O D. 39,200 J
Answer:
39,200J
Explanation:
just took the test
The meteor's potential energy if it has a mass of 10kg at an altitude of 400 m will be 39200 J
What is potential energy ?Potential Energy that depend upon the relative position of various parts of system . It is an energy possessed by an object by virtue of its position or configuration.
mass(m) = 10kg
g (acceleration due to gravity) = 9.8m/s^2
altitude(height (h)) = 400m
Meteor's Potential energy = m * g * h
= 10 * 9.8 * 400 = 39200 J
correct option will be a) 39200 J
learn more about Potential Energy :
https://brainly.com/question/14404024?referrer=searchResults
#SPJ3
Justin and Oscar each hit a baseball with a bat. The baseballs have the same mass, but the ball Justin hits has a greater acceleration. What might be the reason for the greater acceleration of Justin's baseball?
The acceleration is different in both cases because, the force applied is different. Acceleration is force divided by mass of the object. Thus, Justin had greater force than Oscar.
What is force ?Force is an external agent acting on body to change its motion or deform it. There are various kinds of forces such as frictional force, gravitational force, nuclear force etc.
According to Newton's second law of motion, the force acting on an object is the product of its mass and acceleration.
Thus, F = ma
Hence, as the force increases the body is accelerated more.
With the same mass for the two balls, the force used to hit it was different and thus, the acceleration differs in both cases. Therefore, Justin has the greater force.
Find more on force:
https://brainly.com/question/19734564
#SPJ2
PLEASE HELP!!
What guidelines are set forth by the USDA and MyPlate?
Answer:
MyPlate. The benefits of healthy eating add up over time, bite by bite. ...
Fruits. Make half your plate fruits and vegetables: focus on whole fruits. ...
Vegetables. Make half your plate fruits and vegetables: vary your veggies. ...
Grains. Make half your grains whole grains. ...
Protein Foods. Vary your protein routine. ...
Dairy.
Explanation:
PLEASE HELP!!
Give examples of the need for stability and balance in performing physical activity.
Answer:
Walking while alternating knee lifts with each step.
Standing up and sitting down from a chair without using your hands.
Standing with your weight on one leg and raising the other leg to the side or behind you.
Explanation:
Those are the ones that I could best come up with.
What type of presentation us easier to plan using a site map?
A. a presentation that lets users link our from a “home” page or slide
B. an animation created digitally using a program like Flash
C. a slide show that starts on slide one and goes slide by slide to the end
Answer:
I believe that the answer would be A
Explanation:
because there is all of the examples I found online have a home page.
Foliation occurs when minerals are flattened by heat and pressure. this results in a layered or banded texture. What type of rock do you think is foliated?
Visible silicate minerals split into dark and light bands or lineations in a metamorphic foliation known as gneissic banding. Typically coarse and frequently folded, these grains. Gneiss is the name for a rock with this texture.
Any other Gypresgions come from shakespeare and are they used today?
Answer:Both books find Shakespeare deeply Catholic, but they reach very different conclusions about what that meant in his life and work during a time of official Protestantism, the Jesuit mission to England, and sharp divisions among Anglicans, Puritans, and Catholics.
Explanation:
What is the Eiffel Tower made of?
Answer: The Eiffel Tower is primarily made of iron. Gustave Eiffel, the French engineer who designed and oversaw the construction of the tower, used wrought iron to build its frame. In total, the tower contains about 18,000 individual iron pieces and weighs over 10,000 tons. The iron framework is held together by 2.5 million rivets. The tower's base is made of concrete, and the top portion of the tower is covered in bronze plates.
Explanation:
What type of circuit is this in the picture? (Lesson 4.07)
A: Parallel
B: Open
C: Ac
D: Series
Answer: hope this helps ♡
A: Parallel
Explanation:
It's a parallel circuit because it has two or more paths for the electricity to flow through (the paths are parallel).
Answer:
A
Explanation:
please help....
View the image and answer the question.
Identify the concept that the angle above represents and explain what it means in your own words.
Answer:
its a compass rose or a temperature that tells how is it hot or cold or it is to u where to go when needed like a map.And the angles is 6
Explanation:
Earth's atmosphere is composed of
A.
iron, oxygen, and silicon.
B.
nitrogen, oxygen, and trace amounts of other gases.
C.
water, liquid oxygen, and trace amounts of other liquids.
D.
carbon dioxide, ozone, and magnesium.
Answer: B
Explanation:
:)
help me pls i need the answer