mechanical advantage of a first class Lever can be one or greater than one or less than one why
Explanation:
Because they change the direction of force and multiply the effort.
They increase the rate of doing work.
So, MA of first class lever can be one or greater than one or less than one
A motorcycle travels at a constant 20 m/s for 10 s. How far has it traveled?
A college student walking on a sidewalk throws his keys to a friend on a balcony 6m above him. If the college student throws the keys upward at 9.4 m/sec, can his friend on the balcony catch the keys? If not, what distance will the keys reach?
Find the horizontal and vertical displacement comments of 145m displacement of a superhero that flies from the top of a building at an angle of 28 degrees below the horizontal
Answer:
The horizontal and vertical displacement is 128.02 m and 68.07 m respectively.
Explanation:
Displacement, d = 145 m
The top of a building at an angle of 28 degrees below the horizontal
We need to find the horizontal and vertical displacement.
For horizontal displacement,
[tex]D_x=d\cos\theta\\\\D_x=145\times \cos(28)\\\\D_x=128.02\ m[/tex]
For vertical displacement,
[tex]D_y=d\sin\theta\\\\D_y=145\times \sin(28)\\\\D_y=68.07\ m[/tex]
So, the horizontal and vertical displacement is 128.02 m and 68.07 m respectively.
Earth's crust is made up of large and small plates that are in slow, constant motion, driven by convection curents in Earth's mantle. Scientists who study Earth have consistently observed that most earthquakes and volcanoes
occur where plates meet Which of the following best describes or categorizes plate tectonics?
A scientific law
B scientific theory
C hypothesis
D Aprediction
PLEASEEEE HELPP
Answer:
B
Explanation:
Answer:
c
Explanation:
because it is a hypthesis led up by earths crust is made up of large, but dont get to wrong! it is slow so answer is
HYPOTHESIS
A person running has a momentum of 720 kg m/s and is traveling at a velocity of 5 m/s. What is his mass?
144 kg
144 kg
360 kg
360 kg
3,600 kg
3,600 kg
30 kg
Explanation:
Momentum is mass times velocity.
p = mv
720 kg m/s = m (5 m/s)
m = 144 kg
If nitrogen, which has an electronegativity of 2.0, bonda with hydrogen, which has an electronegativity of 2.1, the bond between the two atoms will be classified as a(n) _________ covalent bond.
Answer: it’s Nonpolar
Explanation:
Atoms with small differences in their electronegativities are said to form nonpolar covalent bonds.
Answer:
caden
Explanation:
What is part of the fourth stage in the process of technological design?
O rebuilding and retesting a product
O analyzing the results of a prototype
establishing criteria for a successful product
identifying and defining a problem or need
Answer:
It is A.
Explanation:
Got it right on Edge 2022.
Rebuilding and retesting a product is part of the fourth stage in the process of technological design, therefore the correct answer is option A.
What are the stages of technological design?There are mainly five stages of the technological design
Identifying the issue that needs to be solved is the first step in every problem-solving process.
The second stage is to imagine; during this phase, a designer would generate several concepts and conduct research on potential creations. They must pick a handful of their greatest concepts and then narrow it down to the best.
The chosen product from the imaging stage is planned in the third stage. This process involves designing and drawing the product so that it may be turned into a model or prototype while taking into account the constraints they have to deal with.
Testing, evaluating, and modifying the product are the fourth stage. The designer can determine what they appreciate about their product and what they could change by making a model or prototype of it. Through product testing, this is discovered. If adjustments are required, the designer will repeat the entire procedure until they are satisfied with the final result.
The sharing of your solution is the fifth step. To gather comments, discuss your ideas with others, and enhance your product, you showcase your solution. You might show your answer to a bigger audience in later stages after you've gone through the design process a few times. This is comparable to how World of Inquiry students modifies their homework numerous times before presenting them during the expedition.
Thus, Rebuilding and retesting a product is part of the fourth stage in the process of technological design, therefore the correct answer is option A.
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Please help me please! :(
Answer:
The trachea is one part of the respiratory tree, that is a conduit for air to pass through on its way to or from the alveoli of the lungs. This transmits oxygen to the body and removes carbon dioxide.
The bronchi are the airways that lead from the trachea into the lungs and then branch off into progressively smaller structures until they reach the alveoli, the tiny sacs that allow for the exchange of oxygen and carbon dioxide in the lungs.
Explanation:
Answer:
dont know
Explanation:
sorry man
How do we know if something is living or non-living?
If something is living it usually has to eat something to thrive, for example a tree photosynthesis to get the nutrition it needs while a rock just sits there and isn't living.
Answer:
To be considered living it have to use energy, it has to be made of cells. Something living is also referring to things that were once living
Explanation:
What do you ocean waves and sound waves have in common?
Answer:
They are both mechanical waves
When light waves hit ice, most of them bounce off and radiate back into space. Because of this, ice is best described as which kind of surface?
A.) reflective
B.) absorbent
C.) dense
D.) rough
Elements in a group or family can be expected to have similar:
Noah drops a rock with a density of 1.73 g/cm3 into a pond. Will the rock float or sink?
Explanation:
Substances with their density less than that of water which is 1 g/cm³ will float on it whiles those greater than that of water will sink into the water
From the question the density of the object is greater than that of water so the object will sink into the water
Hope this helps you
Answer:
The rock will sink because it is more dense than water.
Explanation:
I need some help, anything will help, I just need a better understanding of this
Answer:
12 meters
Explanation:
to find this we look at the 8 on the horizontal line this is 8 seconds, you then look upwards to see the height at that point in time
Which statement accurately describes the atmospheres of the inner planets?
Mars has no atmosphere.
Mercury has a thick atmosphere.
Mars and Venus have similar atmospheres.
Earth and Venus have similar atmospheres.
Answer:
Mars and venus have similar atmospheres
Answer:
Earth and Venus have similar atmospheres
Explanation:
The major horizontal surface on an airplane that provides lift.
wings
Lift is generated by every part of the airplane, but most of the lift on a normal airliner is generated by the wings. Lift is a mechanical aerodynamic force produced by the motion of the airplane through the air.
Which statement explains how gravity and inertia work together?
They change the motion of objects.
They take turns working on objects.
They keep all objects moving at the same speed.
They prevent objects from moving in a circular motion.
Answer:
A: They change the motion of objects
Explanation:
Gravity force that attracts a body toward the center of the earth, or toward any other physical body having mass.
Inertia: is a property of matter by which it continues in its existing uniform motion in a straight line, unless that state is changed by an external force.
They change the motion of objects. This statement explains how gravity and inertia work together, Hence option A is correct.
What is Gravity ?Gravity is a basic interaction in physics that produces mutual attraction between all objects having mass or energy. By far the weakest of the four fundamental interactions, gravity is approximately 1038 times weaker than the strong interaction, 1036 times weaker than the electromagnetic force, and 1029 times weaker than the weak interaction. As a result, it has no effect at the level of subatomic particles. Gravity, on the other hand, is the most significant interaction between things on the macroscopic scale, determining the motion of planets, stars, galaxies, and even light.
Hence option A is correct.
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What symbol do we use for the resultant?
Answer:
8-0!/
Explanation:
2. Use Tables Both an atom of carbon-12 and
an atom of boron-12 have the same mass
number. Use a periodic table to help you
describe the differences in the two atoms.
Answer:\
the atomic number of boron (B) is 5.
Atomic number is the number of protons, which is characteristic of a chemical element. Atomic number increases from left to right in Periodic table.
Boron is an element with atomic number 5, which means it has 5 protons and 5 electrons, boron atom has neutral charge.
Electron configuration of boron: ₅B: 1s² 2s² 2p¹, it has three valence electrons in 2s and 2p orbitals.
Explanation:
there you go have a good day
A glacier advances at 3.7 × 10^−6 cm/s. How far will it move in 89000 s? Answer in units of cm.^
[tex]v = 3.7 \times {10}^{ - 6} \: \: \frac{cm}{s} [/tex]
[tex]3.7 \times {10}^{ - 6} = \frac{x}{89000} \\ [/tex]
Multiply sides by 89000
[tex]3.7 \times {10}^{ - 6} \times 89 \times {10}^{3} = x [/tex]
[tex]37 \times {10}^{ - 1} \times 89 \times {10}^{ - 3} =x [/tex]
[tex]37 \times 89 \times {10}^{ - 4} = x [/tex]
[tex]x = 3293 \times {10}^{ - 4} \: \: cm [/tex]
And we're done.....♥️♥️♥️♥️♥️
Determine the total displacement of a dog that runs 15 m north, 6 m south, then 8 m north.
Answer:
the displacement Is 17m north
Explanation:
15-6=9
9+8=17
The total displacement of a dog that runs 15 meters north, 6 meters south, then 8 meters north would be 17 meters because displacement is measured by the shortest distance between the initial and final position of the moving object.
What is displacement?An object's position changes if it moves in relation to a reference frame, such as when a passenger moves to the back of an airplane or a professor moves to the right in relation to a whiteboard.
Displacement describes this shift in location.
Displacement is a vector quantity.
Since the displacement is determined by the smallest distance between the moving object's original and final positions, a dog traveling 15 meters north, 6 meters south, then 8 meters north would move a total of 17 meters.
Thus, the total displacement of the dog comes out to be 17 meters.
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Which explanation is based on scientific evidence?
A. Using ancient techniques, it is possible to change lead into gold.
B. Chemical data collected from rock formations can be used to
determine that Earth is billions of years old.
C. The mineral quartz has properties that help protect the body from
illness.
D. The relative positions of the Sun, Earth, and stars at the time of a
person's birth can affect his or her personality.
Answer:
The answer is B. I hope this helps!
Explanation:
B is the only answer with a scientific explanation. You cannot change lead into gold, quartz can't protect you from illness, and the positions of stars and planets have no effect on a person.
Which of the following are conditions required for static equilibrium? Select TWO answers. Elimination Tool A Linear Momentum = →p=0. B:Angular Momentum = →L=0. C:Change in Energy = ΔEtotal=0. D: Net Force ≠0.
Answer:
The correct answers are Choices 'A' and 'B'.
Explanation:
The correct answers are Choices 'A' and 'B'.
Static equilibrium means that the object is not moving relative to a given frame of reference.
Choice 'A' Linear Momentum = →p=0
is required. "Not moving" means the velocity
v must be 0(otherwise the object would be moving across the reference frame), so an object's linear momentum (which is its mass times its velocity) must be 0.
Choice 'B' Angular Momentum = →L=0 is required. "Not moving" also means that the object can not be rotating or spinning inside the reference frame, which means the rotational velocity ω must be 0. So an object's angular momentum (which is its mass times its rotational velocity) must be 0 .
Choice 'C' Change in Energy is true (this is known as conservation of energy), but it is not a requirement of static equilibrium because "not moving" is not the same as "isolated."
There are many forms of energy, many of which are not related to movement. For example, a light bulb in a stationary lamp is in static equilibrium, but if the light is turned on .
Similarly, when you add gasoline to your car at a gas station, the car must be in static equilibrium, but the addition of the gasoline from outside the car changes the Total Energy of the car.
Choice 'D' Net Force ≠0 is a non-equilibrium condition because by Newton's second law of motion, so any non-zero net force will cause an acceleration, and acceleration is not a state of static (or dynamic) equilibrium.
In 1969 the Apollo astronauts left a laser reflector on the Moon. This was to be used to help scientists to make very accurate measurements of the distance between the Earth and the Moon. The mean distance between the centres of the Earth and Moon is 385 000 km, and light travels at 3 × 10⁸ m/s.
Answer:
I guess that you want to calculate the averae time that passes since you "fire" the laser, and you see the reflection.
We know that:
Distance = Time*Speed
Distance/speed = time.
In this case we have:
Distance = 385,000km
Speed = 3x10^8m/s
First, there are two corrections:
1) The distance to the moon is traveled two times, so the actual distance would be:
Distance = 2*385,000km = 770,000km
2) Both quantities should be written in the same units, so we can write the speed in kilometers:
We know that:
1km = 1000m
Then 3x10^8 m/s = (3x10^8/10^3) km/s = 3x10^(8 - 3) km/s = 3x10^5 km/s
Now we can solve the equation:
Time = 770,000km/(300,000 km/s) = 2.57 seconds.
How do I answer number 5?
Answer:
He needs to throw the trash before he gets to the Trash can because he
needs some force for it to be able to go in because it he throw it after he passed it, it would not make it because your going a certain speed, and if you try to throw it when it is right in front of you, it will still miss because it is still going the same speed as the car.
Explanation:
Hope that helps you :)
7. A mass m1 of 250 g is on a table connected to a massless pulley, as shown. The coefficient of friction between m1 and the table is 0.228. What is the maximum value of m2 before m1 starts sliding across the table?
Answer:
The minimum mass of m2 before m1 starts sliding across the table is 57 grams
Explanation:
The given mass on the table, m1 = 250 g
The coefficient of friction between the table and the mass, m1, μ = 0.228
Therefore, the friction force, F[tex]_F[/tex] between the mass m1 and the table is given as follows;
F[tex]_F[/tex] = W₁ × μ
Where;
W₁ = The weight of m1 = Mass of m1 × Acceleration due to gravity
W₁ = 250 g × 9.81 m/s² = 0.25 kg × 9.81 m/s² = 2.4525 N
W₁ = 2.4525 N
Which gives;
F[tex]_F[/tex] = 2.4525 N × 0.228 = 0.55917 N
F[tex]_F[/tex] = 0.55917 N
By equilibrium of forces, the weight, W₂, of the mass m2 at which the mass m1 starts sliding is equal to the frictional force F[tex]_F[/tex] of m1 or 0.55917 N
Therefore, for slipping to occur, we have;
W₂ = 0.55917 N
However, W₂ = Mass of m2 × Acceleration due to gravity
∴ W₂ = 0.55917 N = m2 × 9.81 m/s²
0.55917 N = m2 × 9.81 m/s²
m2 = 0.55917 N/(9.81 m/s²) = 0.057 kg = 57 grams
The minimum mass of m2 before m1 starts sliding across the table is 57 grams.
true or false: forces have a magnitude and a direction
Question 9 (28 points)
The earth's gravity keeps the moon in orbit by pulling on it. The moon's gravity
A. can only pull on smaller objects such as asteroids but has no effect on the earth
B. pulls back on the earth
C. pushes the moon away from the earth
D. doesn't affect anything
The moon's gravity pulls back on the earth. (B)
The two pulls are EQUAL.
Gravity always produces a pair (2) of equal forces in opposite directions. For example, your weight on the Earth is equal to the Earth's weight on you !
a gardener crosses a plant with red flowers with one with white flowers. each plant is pure for its trait for flower color.
if the gene for flower colors shows incomplete dominance, what kind of coloring will the flowers on the offspring plants most likely have
A Gardner crosses the plant with red and white flowers. Each is pure of its traits. If the gene of the flower shows incomplete dominance the dominant flow gene will show the color.
They are a mix of red and white then on the basis of dominance and recessiveness. The offspring will be in pink color. Hence the option C only pink is correct.Learn more about the plant with red flowers with one with
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