Answer:
B. zero
Explanation:
The total mechanical energy of a spring is equal to the sum of its kinetic energy, K, and its potential energy, U:
[tex]E=K+U[/tex]
Where
[tex]K=\frac{1}{2}mv^2[/tex] is the kinetic energy, where m is the mass and v is the speed
[tex]U=\frac{1}{2}kx^2[/tex] is the potential energy, with k being the spring constant and x the displacement
The total mechanical energy is conserved during the entire motion of the spring. We have two particular situations:
- At the equilibrium position, the displacement is zero: x=0, so U=0 and the kinetic energy is maximum.
- At the position of maximum displacement (so the leftmost or rightmost position), the displacement is maximum, so U is maximum while the speed is zero (v=0), and therefore the kinetic energy is also zero: K = 0.
Therefore, the correct answer is
B. zero
“Persistence, patience, perseverance... When something doesn't work, there is always a solution”
Who said that?
Answer:
Thomas Edison
Explanation:
Albert Einstein and Thomas Edison both highlighted the importance of these qualities to achieve success. Their insights demonstrate that long-term commitment and effort are crucial for overcoming challenges.
"Persistence, patience, perseverance... When something doesn't work, there is always a solution" is a quote often associated with the importance of these qualities in achieving success. A well-known quote by Albert Einstein complements this idea: "It's not that I'm so smart; it's just that I stay with problems longer." This emphasizes the value of persistent effort over innate ability.
Similarly, Thomas Edison, the famous inventor, highlighted persistence when he said, "I've just found 10,000 ways that won't work!" after numerous attempts to create a functional light bulb filament. These examples show that successful individuals frequently attribute their achievements to perseverance and long-term commitment rather than just intelligence or luck.
If an object falls for 4 seconds, how fast is it going when it hits the ground?
Acceleration due to gravity is about 9.8 m/s²
So after every second, the speed increase by 9.8 m/s
After 1 second, the object would fall at a speed of 9.8 m/s
After 2 seconds the object would fall at a speed of 19.6 m/s
So after 4 seconds, the object is going to be at a speed of:
9.8 x 4 = 39.2 m/s
-------------------------------------------------
Answer
39.2 m/s
Jake drags a sled of mass 25 kg across the snow. The sled is attached to a rope that pulls with a force of 50 N at an angle of 32 degrees. If there is no friction, what is the normal force acting on the sled?
Answer:
218.5 N
Explanation:
In order for the sled to be in equilibrium along the vertical direction, the forces acting along this direction must be balanced. So the equilibrium equation is:
[tex]N+F sin \theta - mg =0[/tex]
where
N is the normal force
F = 50 N is the force that pulls the sled
[tex]\theta[/tex] is the angle between the force and the horizontal, so
[tex]F sin \theta[/tex] is the component of F acting along the vertical direction
(mg) is the weight of the sled, with
m = 25 kg being the mass of the sled
g = 9.8 m/s^2 is the acceleration due to gravity
Solving the formula for N, we find
[tex]N=mg-F sin \theta = (25 kg)(9.8 m/s^2)-(50 N)sin 32^{\circ}=218.5 N[/tex]
By resolving into y - component, the normal force acting on the sled is 218.5 N.
FORCEForce is the product of mass and acceleration. Where a frictional force is negligible, the resultant force will be equal to the force applied.
Given that Jake drags a sled of mass 25 kg across the snow. The sled is attached to a rope that pulls with a force of 50 N at an angle of 32 degrees.
If g is taken to be 9.8 m/s^2, the forces acting on the mass are:
The weight mg = 25 x 10 = 245 N
The normal reaction N = ?
The applied force F which can be resolved into x and y components
x - component = 50 x cos 32 = 42.4N
y - component = 50 x sin 32 = 26.5 N
If there is no friction, the normal force acting on the sled can be calculated by resolving all the forces into x and y component.
By resolving into y - component,
N + 26.5 = 245
N = 245 - 26.5
N = 218.5 N
Therefore, the normal force acting on the sled is 218.5 N.
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Herpetology is the study of what?
Birds,
Exotic animals,
Zoo habitats, Reptiles
Answer:
Herpetology is the branch of zoology concerned with reptiles and amphibians.
Answer:
birds
Explanation:
im taking the test rn
suppose that a block is pulled 16 meters across a floor. what amount of work is done if the force used to drag the block is 22n
Work = (force) x (distance)
Work = (22 N) x (16 m)
Work = 352 Joules
Answer:
352 jules
Explanation: please leave a rating
Which statement describes how rays behave when they travel through media during reflection and refraction?
During refraction, rays stay in the original medium, and during reflection, rays pass into a new medium.
During reflection, rays stay in the original medium, and during refraction, rays pass into a new medium.
During reflection and refraction, rays stay in the original medium.
During reflection and refraction, rays pass into a new medium.
Answer:
B. During reflection, rays stay in the original medium, and during refraction, rays pass into a new medium.
Explanation:
Trust me bro.
B. During reflection, rays stay in the original medium, and during refraction, rays pass into a new medium describes how rays behave when they travel through media during reflection and refraction.
What happens when light rays reflect?Rays change direction as they reflect off the surface, move from one transparent medium to another, or pass through a medium whose composition is constantly changing.
Reflection involves changing the direction of the wave as it bounces off the barrier. Refraction of a wave involves changing the direction of the wave as it transitions from one medium to another. The refraction or curvature of a wave path involves changes in wave velocity and wavelength.
Considering the two videos we just watched, light can either bounce (reflect) through one medium and bounce (reflect) in another medium, or bend (break) as it passes through one medium and another. I have.
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A concave mirror is used to ______ ( converge, diverge) light and a convex mirror is used to _____( diverge or converge )
Answer : A concave mirror is used to converge the light and a convex mirror is used to diverge the light.
Explanation :
Convex mirror : In convex mirror, the mirror is coated inside the spherical surface. It is also known as a converging mirror.
The focus lies behind the mirror.
Concave mirrors : In concave mirror, the mirror is coated outside the spherical surface. It is also known as a diverging mirror.
The focus lies infront the mirror.
As per question, a concave mirror is used to converge the light and a convex mirror is used to diverge the light.
Hence, a concave mirror is used to converge the light and a convex mirror is used to diverge the light.
An object is 39 cm away from a concave mirrors surface along the principles axis. If the mirrors focal length is 9.50 cm, how far away is the corresponding image?
Answer:
12.6 cm
Explanation:
We can use the mirror equation to find the distance of the image from the mirror:
[tex]\frac{1}{f}=\frac{1}{p}+\frac{1}{q}[/tex]
where here we have
f = 9.50 cm is the focal length
p = 39 cm is the distance of the object from the mirror
Solving the equation for q, we find:
[tex]\frac{1}{q}=\frac{1}{f}-\frac{1}{p}=\frac{1}{9.50 cm}-\frac{1}{39 cm}=0.080 cm^{-1}\\q = \frac{1}{0.080 cm}=12.6 cm[/tex]
Which element's symbol could replace the question mark in
the diagram?
O boron (B)
O neon (Ne)
O rubidium (Rb)
O arsenic (As)
Answer:
arsenic (As)- last choice
The element's symbol could replace the question mark in the diagram is Arsenic (As).
What is element?An element is characterized by its atomic number. Each element has different number of protons in the nuclei of its atoms.
The diagram represents the electrons in the form of dots. The no of dots or electrons attached to the element with question mark is five. So, the element recognized as Arsenic.
Thus, the element's symbol could replace the question mark in the diagram is Arsenic (As).
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how does the suns energy contribute to the carbon cycle
Answer:
Photosynthesis
Light energy from the sun stimulates photosynthesis by green plants. One major component of the carbon cycle is the reduction of the carbon (IV) oxide content in the atmosphere by plants. Plants take in Carbon (IV) oxide to use during the process of making their own food. During this process light energy is absorbed by chlorophyll and is used to convert carbon (IV) oxide and water to glucose.
This glucose is used during respiration by living organisms that give out carbon (IV) oxide. The cycle continues.
A student claims that any object in motion must experience a force that keeps it in motion. Do you agree or disagree? Explain your reasoning.
Answer: agree
Explanation: because there is always a force that causes motion..
Also I’m back
Where’s the old gang?
Newton's first law of motion states that an object in motion will continue to move at a constant speed in a straight line unless acted upon by an external force. So, not all objects in motion require a force to keep them in motion.
Explanation:According to Newton's first law of motion, an object in motion will continue to move at a constant speed in a straight line unless acted upon by an external force. So, it is not true that any object in motion must experience a force to keep it in motion. The force is only necessary to change the object's state of motion, such as slowing it down or altering its direction.
For example, imagine a hockey puck sliding on a frictionless ice rink. Once given an initial push, the puck will continue moving at a constant speed in a straight line until it encounters an external force, such as contact with the boards or another player.
Therefore, I disagree with the student's claim. An object in motion does not necessarily need a force to keep it in motion, but rather a force is required to change its state of motion.
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Which fundamental force keeps the nucleus of an atom from breaking apart?
A. Electromagnetic force
B. Gravity
C. Strong nuclear force
O
D. Weak nuclear force
Answer:
Strong nuclear force
Explanation:
Strong nuclear force is the answer for A P E X
Earth has a mass of 5.97 x 1024kg, and a mean radius of 6.38 x 10m. What would be the orbita
satellite in orbit 1.44 x 108 m above Earth?
a. v, = 630m/s,
c. v, - 1630m/s,
T = 2.78 x 10 s
T=5.78 x 10s
b. V = 1820m/s,
d. V, - 1260m/s,
T = 6.78 x 106 s
T=5.78 x 10's
Please select the best answer from the choices provid
Answer:
v = 1630 m/s
T = 5.78 x 10^5 s
Explanation:
The tangential speed of the satellite can be found by requiring that the gravitational force on the satellite is equal to the centripetal force:
[tex]G\frac{Mm}{(R+h)^2}=m\frac{v^2}{R+h}[/tex]
where
G is the gravitational constant
M=5.97 x 1024kg is the Earth's mass
m is the satellite's mass
[tex]R=6.38 \cdot 10^6 m[/tex] is the Earth's radius
[tex]h=1.44\cdot 10^8 m[/tex] is the altitude of the satellite
v is the speed of the satellite
Solving for v,
[tex]v=\sqrt{\frac{GM}{R+h}}=\sqrt{\frac{(6.67\cdot 10^{-11})(5.97\cdot 10^{24}kg)}{6.38\cdot 10^6 m+1.44\cdot 10^8 m}}=1627 m/s \sim 1630 m/s[/tex]
And the period of the orbit is equal to the ratio between the distance covered during one revolution (the circumference of the orbit) and the speed:
[tex]T=\frac{2 \pi (R+h)}{v}=\frac{2\pi (6.38\cdot 10^6 m+1.44\cdot 10^8 m)}{1630 m/s}=5.79\cdot 10^5 s[/tex]
So the correct answer is
v = 1630 m/s
T = 5.78 x 10^5 s
Astronomers classify stars according to their (1 point) distance from Earth. color, size, and absolute brightness. age and parallax. all of the above
Answer:
All of the above
Explanation:
Astronomers use all of those measures to classify stars. If you want to look more into classifying stars, check out the Hertzsprung-Russel Diagram. It covers how to identify red giants, main sequence, dwarf stars, ect. Distance from earth is typically measured in light years. The color of stars generally determines how hot they are. (Blue stars are the hottest) Also, the parallax method is used to measure stars that are closer to earth. This method relies heavily on geometry though.
Hope this helped!
How is a fission reactor different from a fusion reactor? A. The fuel is cheaper B. The fuel must be processed C. There is less radioactive waste D. The transportation of fuel is safer
Answer:
the answer is B ,
Explanation: because fusion reactors in concept would use hydrogen.
The fission reactor, different from a fusion reactor. Because he fuels must be processed in the fission reactor. Option B is correct.
What is nuclear fusion?The process by which two or more tiny nuclei unite to generate a bigger nucleus is known as a nuclear fusion reaction.
The fission reactor, different from a fusion reactor. Because he fuels must be processed in the fission reactor.
Hence, option B is correct.
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How would the composition of an atom change if both the atomic number and mass number each increase by one?
A) The atom would have 1 more neutron.
B) The atom would have one more proton and electron.
C) The atom would have one more proton and one more neutron.
D) The atom would have one more proton, one more neutron and one more electron.
If both the atomic number and mass number each increased by one, then ...
-- the atom would have one more proton in its nucleus,
and
-- whenever it was in a neutral state, it would also have one more electron in its cloud.
choice - B
An example for non periodic motion.
Answer:
Motion of tides in the sea.
Explanation:
The motion which does not repeat itself after the regular interval of time is called non-periodic motion.
Non-periodic motion refers to movement that does not repeat in a regular pattern. The Foucault pendulum is an example, as its plane of oscillation rotates due to Earth's rotation, distinguishing it from periodic motions like simple harmonic motion.
Examples of Non-Periodic Motion
An example of non-periodic motion is the motion of a projectile, such as a ball thrown into the air. Unlike periodic motion, non-periodic motion does not repeat itself in a regular pattern over time. The Foucault pendulum is a classic example of motion in non-inertial frames and is often mistaken as exhibiting periodic behavior. However, while a simple pendulum oscillates back and forth in a regular manner, the plane of oscillation of the Foucault pendulum gradually rotates due to the Earth's rotation, which is an example of non-linear motion. This slow rotation cannot be characterized by a single period, distinguishing it as non-periodic motion.
In contrast, simple harmonic motion (SHM) is a classic representative of periodic motion. An example of SHM is a mass attached to a spring that moves back and forth; its displacement can be represented as a sine wave function, indicating its periodic nature. Such systems have defining quantities like amplitude, period, and frequency, which do not apply to non-periodic motions.
Other examples of non-periodic motion might include a leaf falling from a tree, a car navigating through city traffic, or the random motion of a gas particle, which do not repeat consistently and lack a regular period.
which of the following describes scientific law
Answer:
A scientific law is a statement based on repeated experimental observations that describes some aspect of the world. A scientific law always applies under the same conditions, and implies that there is a causal relationship involving its elements
Answer:
An object at rest will remain at rest unless an unbalanced force acts upon it.
Study Island Answer
Which vector best represents the net force acting on +3C charge in the diagram?
A
B
C
D
-- The two negative charges both attract the positive charge at the origin.
-- The -4C charges are horizontally symmetrical, so there's no net horizontal force on the +3C at the origin.
-- However, the -4C both pull it down.
-- So the net force on the +3C at the origin is directed straight down.
The arrow labelled ' C ' represents the net force on it.
Answer:
Choice C I got it correct on the assignment.
Explanation:
Is a typical refrigerator door made of iron or aluminum? Explain.
Answer: Aluminum, because the parts that make a refrigerator are most definitely aluminum
Explanation:
A typical refrigerator door is made of steel or aluminum and not by iron. Similarly, the exterior cabinet also made of aluminum metal.
What are raw materials of refrigerator ?The outer cabinet and door, the inner cabinet or liner, the insulation placed between the two, the cooling system, the refrigerant, and the fittings make up the majority of modern refrigerators. Aluminum or steel sheet metal that has occasionally been preprinted is used to make the cabinet and door.
Typically, the metal is bought in a coil and supplied either straight into the production process or chopped to size and fed in sheets. Like the outside cabinet, the inside cabinet is built of sheet metal or plastic.
Fiberglass or polyfoam insulation is used to fill the space between the inner and exterior cabinets. Aluminum, copper, or an alloy is used to make the compressor, condenser, coils, and fins of the cooling system.
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What is the mass of a stone moving at a speed of 15 meters/second and having a momentum of 7.5 kilogram - meters / seconds
Answer:
0.5 kg
Explanation:
The momentum of an object is defined as
p = mv
where
m is the mass
v is the velocity
In this problem we have,
v = 15 m/s is the velocity of the stone
p = 7.5 kg m/s is the momentum
Solving for m, we can find the mass of the stone:
[tex]m=\frac{p}{v}=\frac{7.5 kg m/s}{15 m/s}=0.5 kg[/tex]
Data:
p = 7.5kg-m/s
v = 15m/s
m = ?
Explanation:
P = m×v
m = P/v
m = 7.5/15
m = 0.5kgs
Assuming no air resistance, all projectiles have:
A) constant vertical motion and accelerated horizontal motion.
B) constant vertical motion and constant horizontal motion.
C) accelerated vertical motion and constant horizontal motion.
D) accelerated vertical motion and accelerated horizontal motion.
In the absence of air resistance, projectiles exhibit accelerated vertical motion due to gravity and constant horizontal motion, as there is no horizontal force acting upon it.
Explanation:Assuming no air resistance, all projectiles exhibit C) accelerated vertical motion and constant horizontal motion.
In physics, the motion of a projectile under gravity is divided into two components: vertical and horizontal. The vertical motion of a projectile is influenced by the force of gravity, which causes a constant acceleration downwards. This is why when a projectile is launched, it moves upwards slowing down until it reaches a peak, and then accelerates downwards as it falls. The force of gravity does not affect the horizontal motion, which remains constant assuming no air resistance.
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Final answer:
The answer is C) accelerated vertical motion and constant horizontal motion, due to gravity's constant acceleration acting vertically and no horizontal forces acting after launch.
Explanation:
The correct answer to the student's question is C) accelerated vertical motion and constant horizontal motion. In projectile motion, assuming no air resistance, the horizontal component of the motion has a constant velocity because there is no force acting in the horizontal direction once the object is in flight. However, the vertical component is influenced by the constant acceleration due to gravity (9.80 m/s2 downward). Thus, the vertical motion of a projectile is always accelerating downward at a constant rate, while the horizontal motion proceeds at a constant velocity.
One way to think about this is to imagine throwing a ball forward; the ball will move horizontally at the speed you threw it (ignoring air resistance) but will also begin to fall vertically due to gravity. This results in a characteristic parabolic motion, which is a path that the projectile follows under the influence of only constant gravitational acceleration.
A 60.0 kg runner is moving at 6.00 m/s and speeds up to 9.00 m/s. The runner’s change in kinetic energy is 1,350 J.
How much work was done?
Answer:
1,350 J
Explanation:
According to the work-energy theorem, the work done equals the change in kinetic energy. So W = 1,350 J.
A 60.0 kg runner is moving at 6.00 m/s and speeds up to 9.00 m/s. Hence, The work done on the runner is 810 J.
Given:
ΔKE = 1,350 J
The change in kinetic energy (ΔKE) is equal to the work done on the runner (W).
ΔKE = W
Given:
ΔKE = 1,350 J
ΔKE = KE(final) - KE(initial)
KE(initial) = (1/2) × m × (initial velocity)² = (1/2) × 60.0 × (6.00)² = 540 J
KE(final) = (1/2) × m × (final velocity)² = (1/2) × 60.0 × (9.00)² = 1,080 J
Now, we can find the work done is:
ΔKE = KE(final) - KE(initial)
1,350 = 1,080 - 540 + W
1,350= 540 + W
W = 810 J
Therefore, the work done on the runner is 810 J.
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the power in an electrical circuit is given by the equation p=lr, where l is the current flowing through the circuit and r is the resistance of the circuit. what is the power in a circuit that has a current of 12 amps and a resistance of 100 ohms?
Answer:14,400 watts :)
Explanation:
How is transported soil different from residual soil? A. It forms on unconsolidated materials. B. It transports other materials. C. It has been moved from another location. D. It develops on bedrock
Answer:
C. It has been moved from another location.
Explanation:
Residual soil is that which has been formed by the weathering of the rocks in the same place where it is located, with a virtually zero displacement of the particles, while the transported soil is that which forms a loose mantle, resulting from the disintegration or decomposition of the rocks. Since it is an unconsolidated mantle, its products are transported by water, wind or ice.
Answer:Hello the correct answer for penn foster is it forms on uncosolidated materials.
Explanation:
Which one of these is currently conducting manned space exploration?
A. Apollo
B. Voyager
C. space shuttle program
D. International Space Station
Answer:D.International Space Station
Explanation:
The only one still in space
Answer: D. International Space Station
Explanation: The International Space Station is currently orbiting Earth.
PLEASE SOMEONE HELP! Will give BRAINLIEST! If you know physics please help me! I don’t understand
Q = 3.973x10⁻⁷C.
The key to solve this problem is using the equation of a parallel plate capacitor.
C = Q/Vᵃᵇ = ε₀ A/d Where C is the capacitance, Q is the charge placed on the plates, Vᵃᵇ is the potential difference between the plates, ε₀ is the constant of the permittivity of vacuum, A is the area of the plates, and d is the separation of the plates.
Clear Q from the equation Q/Vᵃᵇ = ε₀ A/d:
Q = ε₀AVᵃᵇ/d
With ε₀ = 8.85x10⁻¹²F/m, A = 5.10x10⁻³m², Vᵃᵇ = 125.00V, and d = 1.42x10⁻⁵m
Q = (8.85x10⁻¹²F/m)(5.10x10⁻³m²)(125.00V)/1.42x10⁻⁵m = 3.973x10⁻⁷C
Find the magnitude of the sum
of these two vectors:
12.0 m
45.0° 9.66 m
please HELP me with this
Answer:
8.57 m
Explanation:
To solve the problem, we have to decompose the two vectors along the two directions first:
Vector A:
- x component: Ax = +9.66 m
- y compoment: Ay = 0 (the vector lies along the x-axis)
Vector B:
- x component: [tex]B_x = -(12.0 m) cos 45^{\circ}=-8.49 m[/tex]
- y component: [tex]B_y = (12.0 m) sin 45^{\circ}=8.49 m[/tex]
So now we can find the sum of the two vectors by adding the components along each axis:
[tex]R_x = A_x + B_x = 9.66 m - 8.49 m = 1.17 m[/tex]
[tex]R_y = A_y + B_y = 0 + 8.49 m = 8.49 m[/tex]
And the magnitude of the sum is given by Pythagorean theorem:
[tex]R=\sqrt{R_x^2+R_y^2}=\sqrt{(1.17 m)^2+(8.49 m)^2}=8.57 m[/tex]
To find the magnitude of the sum of two vectors, you add their magnitudes if they're in the same direction. Given the vectors are 12.0 m at 45.0° and 9.66 m (undirected), assuming the same direction, the magnitude of the sum is 21.66 m.
Explanation:In this problem, we're dealing with vector addition in Physics, specifically calculating the magnitude of the sum of two given vectors. Given that the first vector has a magnitude of 12.0 m at an angle of 45.0°, and the second vector has a magnitude of 9.66 m (with no specific direction provided), we can use the principle of vector addition to find the resultant vector.
In the absence of the direction of the second vector, let's presume it's following the same direction for simplicity. The sum of these vectors (or the resultant vector) can be obtained by adding the magnitudes of the two vectors since they are in the same direction. So, the magnitude of the resultant vector is 12.0 m + 9.66 m = 21.66 m.
If the second vector was in a different direction, we would have to decompose the vectors into their horizontal and vertical components, add these components separately, and then calculate the magnitude and direction of the resultant vector using trigonometric principles.
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ice melting is not a chemical change because
Melting ice is not a chemical reaction, but is a physical change. There is no chemical reaction involved during the melting process, and it is still the same molecular substance.
The struggle among living things to obtain the resources needed to live is called
a. competition
b. spontaneous generation
c. metabolism
d. homeostasis
Answer:
Competition
Explanation: