a pulley of radius 0.9m is used to lift a bucket from the well. if it took 3.6 rotations for the pulley to take water out of the well,how deep is water in the well?
Answer:
h = 20.36[m]
Explanation:
To solve this problem we must calculate the perimeter (length of a circumference) of the circumference, which is denoted by the following equation:
L = 2*π*r
where:
r = radius = 0.9[m]
π = 3.1416
L = 2*(3.1416)*(0.9)
L = 5.654[m]
Now we know that the pulley or circumference had to rotate 3.6 times to get the water out of the well. In this way the depth of the well can be calculated by means of the following equation:
h = 3.6*L
h = 3.6*5.654
h = 20.36[m]
4) Why is it important to do a warm up with stretching and also a cool down with
stretching when exercising?
Answer:
Warming up may help reduce muscle soreness and lessen your risk of injury. Cooling down after your workout allows for a gradual recovery of preexercise heart rate and blood pressure.
Explanation:
How long will it take a projectile to hit the ground from a 400 m tall cliff when launched at 30 m/s horizontally?
19.55 sec
13.33 sec
9.03 sec
4.54 sec
Fast reply if possible
Explanation:
A physical change is a change to the physical properties of a substance. This type of change does
not change the nature of the substance. *
Answer:
False
Explanation:
1. What are the properties of a compound? Give an example.
Answer:
A compound has unique properties that are distinct from the properties of its elemental constituents. One familiar chemical compound is water, a liquid that is nonflammable and does not support combustion. It is composed of two elements: hydrogen, an extremely flammable gas, and oxygen, a gas that supports combustion.
What is your average speed in mph if you travel 15 miles in 2 hours and 30
minutes?
hey
Answer:
6 mph
Explanation:
mph = miles per hour
So 15 miles over 2.5hrs
So 15/2.5 = 6 mph
Elements in a group or family can be expected to have similar:
What is the trademark of the Harlem Globetrotters?
He sees a mouse sniffing along at 0.2 m/s but it hears and starts to scurry for safety. In just 4.7 s it speeds up to 1.6 m/s. Find its acceleration.
Answer:
0.30 m/s²
Explanation:
Given:
v₀ = 0.2 m/s
v = 1.6 m/s
t = 4.7 s
Find: a
a = (v − v₀) / t
a = (1.6 m/s − 0.2 m/s) / 4.7 s
a = 0.30 m/s²
In your own words, describe conservation of mass. Use examples to support your answer.
Answer:
The law of conservation of mass or principle of mass conservation states that for any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as the system's mass cannot change, so quantity can neither be added nor be removed
Explanation:
Which of the following is a metal?
A.
iron (Fe)
B.
sodium (Na)
C.
calcium (Ca)
D.
all of these
Answer:
D. All of the above
Explanation:
YES
From the given options, Iron, sodium, and calcium are metals. (option d)
A. Iron (Fe): Iron is a metal. It is one of the most abundant elements on Earth and is widely used in construction, manufacturing, and various industries due to its strength and durability. Iron is an excellent conductor of electricity, which makes it essential for electrical applications.
B. Sodium (Na): Sodium is also a metal. It is a highly reactive metal and is commonly found in compounds like sodium chloride (table salt). Sodium is an essential element for living organisms and plays a crucial role in various biological processes.
C. Calcium (Ca): Calcium is a metal. It is an important element for the human body, as it is a major component of bones and teeth. Calcium is also involved in muscle contraction, nerve function, and blood clotting. Moreover, it is used in the production of alloys and as a deoxidizer in metallurgy.
D. All of these: The correct answer is D. All of the options (iron, sodium, and calcium) are metals. They exhibit typical metallic properties such as high electrical and thermal conductivity, metallic luster, and malleability.
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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
An object has a fixed volume and a variable shape before it changes state.
After the change, it can change in both shape and volume. Which change of
state has occurred? (APEX)
A. Gas to liquid
B. Solid to liquid
C. Liquid to gas
D. Gas to plasma
Answer:
AExplanation:
The answer is C because the liquid has to turn into gas which the liquid has volume and a variable shape. Gas does not have volume or shape.
An object has a fixed volume and a variable shape before it changes state. After the change, it can change in both shape and volume then the change of state occurred was liquid to gas
What is the matter?
Anything which has mass and occupies spaces is known as matter ,mainly there are four states of matter solid liquid gases, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
Liquid has a fixed volume but it can change its shape to any form but gases can change their volume as well as shape, therefore the correct answer is C.
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If a man walks 600 meters in 300 seconds, what was his speed in meters per second?
Answer:
His speed in meters per second was 2. Or, 2 meters per second.
Explanation:
Representation in the House is based on
A. equality between states
B. a state's population
Answer:
state population
Explanation:
bestie you can find it on Constitution on article l
Two double bonds means that the total number of electrons being shared in the molecule is
One double bond consists 4 electrons, so 2 double bonds means 8 electrons
Answer: 8 electrons
Explanation:edg
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 graph above best illustrates homeostasis
Which of Newton’s laws of motion states that an object at rest stays at rest and an object in motion stays in motion with the same speed and the same direction unless acted upon by an unbalanced force?(1 point)
According to Newton's First Law of Motion, a body at rest will continue to be at rest unless another force acts on it, and a body moving at a constant speed will continue to move in a straight path unless another force acts on it.
what is the Newton’s laws of Inertia?A body must be subject to an external force in order to accelerate (or decelerate) or alter its direction of motion. Net forces or imbalanced forces are other names for external forces.
Inertia is the quality that a body possesses that prevents it from moving when at rest or from speeding up or slowing down while in motion. The mass, or quantity of substance in a body, directly relates to inertia. A body has more inertia the more mass it possesses.
what is Second Law of Motion ?According to the Second Law of Motion, if an imbalanced force applies on a body, the body will accelerate (or decelerate), changing its speed. It is possible to state that a body at rest is thought to have zero speed ( a constant speed). Therefore, an imbalanced force is any force that causes a body to move. Additionally, an imbalanced force is any force that causes a body to move slowly or quickly, such as gravity or friction. The formula below can be used to demonstrate this law.
F= ma
The imbalanced force is F.
The object's mass is m.
The force's acceleration, a, is measured.
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a steel ball of mass 0.1 kg falls from a height of 1.8metres
Hurricanes hit
regions more frequently because of the close proximity to large bodies of water.
Coastal
Mountainious
Midwestern
If you push on an object with 10 N to the right and your friend pushes with 20 N to the left, what direction will the object move?
Answer:
The answer is left
Explanation:
because 20N is greater Then 10N
what are the four system of measurement
Answer:
ask google
Explanation:
WHAT IS PIVOT POINT ?
In financial markets, a pivot point is a price level that is used by traders as a possible indicator of market movement. A pivot point is calculated as an average of significant prices from the performance of a market in the prior trading period.
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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Which statement accurately describes static electricity?
Th beste description for static electricity is that It is caused by separated positive and negative charges.
What is static electricity?Static electricity referes to electricity that is static or that do not flow.
It is caused by separated positive and negative charges.
Therefore, the best description for static electricity is that It is caused by separated positive and negative charges.
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Answer:
B
Explanation:
An object carrying a force of 15N has a mass of 3kg. What is the
acceleration of this object?
Answer:
the acceleration would be 5kg
Explanation:because you would do 15 divided by 5
Here’s another one :(
A ball is dropped off the roof of a tall building. If the ball reaches the ground in 8 seconds, how tall is the building, in meters? Round to the nearest whole number (a=9.8 m/s2)
Let b be the height of the building, and y the height of the ball at time t, given by
y = b - 1/2 gt²
where g = 9.8 m/s² is the magnitude of the acceleration due to gravity.
It takes the ball 8 s to reach the ground, at which point y = 0, so that
0 = b - 1/2 (9.8 m/s²) (8 s)²
b = 1/2 (9.8 m/s²) (8 s)²
b = 313.6 m
If you know the amplitude of a wave, you know the distance from what
Answer:
You know the distance from mean position.
Answer:
the equilibrium of one wave to the crest of the same wave.
Explanation:
The amplitude of a wave corresponds to the distance between the equilibrium position of the wave and the crest of the same wave (or the distance between the equilibrium position and the through of the same wave), therefore we see that this definition corresponds to option C,
the equilibrium of one wave to the crest of the same wave.
