Answer:
30
Explanation:
30
the total length of the spring in centimeters when it is stretched to the point where 2.8 joules are stored in it is 30.
What are the unit of length ?length can be defined as the measurement which is an act for the identification of the object's length in some standard or non-standard units.
The most common units of length are U.S. customary units and the metric units include SI and non-SI units, others are British Imperial units are also still used in some countries.
Other units of length include kilometres, nanometre, millimetres, centimetres, metres, decimetres where as the Imperial and U.S. customary systems, basic unit of length is the yard.
other units are thou (1⁄1000 of an inch), line (1⁄12 of an inch), inch (25.4 mm), foot (12 inches, 0.3048 m)
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Force (N) = 250
Mass (kg) = 221
Acceleration (m/s^2) = ?
Answer:
The required acceleration is [tex]a=1.1[/tex] m/s²
Explanation:
Given
Force F = 250 NMass m = 221 kgTo determine
Acceleration a = ?
We know that acceleration is produced when a force is applied to a body.
The acceleration can be determined using the formula
[tex]F = ma[/tex]
where
F is the force m is the mass a is the accelerationnow substituting F = 250 , and m = 221 in the formula
[tex]F = ma[/tex]
[tex]250 = 221 (a)[/tex]
switch the equation
[tex]221(a) = 250[/tex]
Divide both sides by 221
[tex]\frac{221a}{221}=\frac{250}{221}[/tex]
simplify
[tex]a=\frac{250}{221}[/tex]
[tex]a=1.1[/tex] m/s²
Therefore, the required acceleration is [tex]a=1.1[/tex] m/s²
Astronomers classify galaxies by their shape. Which of the following terms describes a galaxy that looks like a round or flattened ball and contains little gas and dust between the stars?
A.
elliptical galaxy
B.
irregular galaxy
C.
No galaxies are shaped like a ball
D.
spiral galaxy
The smallest particle of an element; made of electrons, protons, and neutrons
Answer:
atom
Explanation:
Whats is the resistance of a bulb with a current of 60a in a circuit with a 12v battery
Answer:
60a in a circuit with a 12v battery
Explanation:
60a in a circuit with a 12v battery
C + H2 ----------> CH4
Answer:
yes
.......................
Answer:
C + 2H2 -----> CH4
Identify and define Four causes of infections diseases
Answer:
Bacteria
Fungi
Viruses
Parasites
The number of protons plus the number of neutrons in an atom is equal to its
Answer:
Atomic Mass
Explanation:
What characteristic of sound is most closely related to its frequency?
A. Quality
B. Amplitude
C. Speed
D. Pitch
Answer:
The loudness of sound is most closely related to
The pressure within a sound wave determines the loudness of the sound. In this lesson, learn how to calculate the sound pressure level of a sound wave and what this measurement represents.
Explanation:
A car accelerates from rest at 3.5 m/s2 for 6.5 seconds what is the cars final speed
Answer:
please find attached pdf
Explanation:
Help with this question please :>
Answer: A if thats not right its C
Explanation:
Answer: It's c
Explanation: C
A 50 kg bumper car with a 40 kg child and it is at rest when a 60 kg child in her own bumper car slams into it the collision last point1 seconds and the rubber bumpers are perfectly bouncy with no heating from the collision what is the force experienced by the first car
Answer:
F = 99 v₂₀
v₂₀ = 1 m / s, F = 99 N
Explanation:
In this exercise it is asked to find the force during the collision, for this we use the relationship between the momentum and the momentum of car 1
I = Δp
F t = p_f- p₀
F t = m (v_f -v₀) (1)
We must find the final speed of car 1, for this we define a system formed by the two cars, in this case the forces during the collision are internal and the moment is conserved
initial instant. Before the crash
p₀ = 0 + m₂ v₂₀
final instant. After the crash
p_f = m₁ v₁ + m₂ v_{2f}
the moment is preserved
p₀ = p_f
m₂ v₂₀ = m₁ v_{1f} + m₂ v_{2f} (2)
m₂ (v₂₀ - v_2f}) = m₁ v_{1f}
as the collision is elastic the kinetic energy is also conserved
K₀ = K_f
½ m₂ v₂₀² = ½ m₁ v_{1f}² + ½ m₂ v_{2f}²
m₂ (v₂₀² -v_{2f}²) = m₁ v_{1f}²
let's write our system of equations, using
a² - b² = (a + b) (a-b)
m₂ (v₂₀ - v_{2f}) = m₁ v_{1f}
m₂ (v₂₀ -v_{2f}) (v₂₀ + v_{2f}) = m₁ v_{1f}²
to solve we divide the equations
v₂₀ + v_{2f} = v_{1f}
with this we substitute in equation 2 and find the speed of each car, in this case we need the speed of car 1
m₂ v₂₀ = m₁ v_{1f} + m₂ (v_{1f}-v₂₀)
2m₂ v₂₀ = (m₁ + m₂) v_{1f}
v_{1f} = [tex]\frac{2m_2}{m_1+m_2} v_{2o}[/tex]
We substitute in the drive ratio of car 1
F t = m (v_f -v₀)
F = m₁ (\frac{2m_2}{m_1+m_2} v_{2o} - 0) / t
F = [tex]\frac{2m_1 m_2 }{m_1+m_2} \ \frac{v_{2o}}{t}[/tex]
the mass of each car is the mass of the car plus the mass of the boy
m₁ = 50 +40 = 90 kg
m₂ = 50 +60 = 110 kg
time is t = 1
we substitute the values
F = [tex]\frac{ 2\ 90 \ 110}{90+110} \ \frac{v_{2o}}{1}[/tex]2 90 100/90 + 110 vo2 / 1
F = 99 v₂₀
The value of the initial velocity of car 2 is not indicated in the problem, if this velocity is known it can be included and the force value is obtained, suppose that the initial velocity v₂₀ = 1 m / s
F = 99 N
20 points**plz help
Explain the effect of increasing the number or size of the magnets on the speed of a motor.
Explanation:
the speed of the motor can be increased by increasing the strength magnetic field increasing the current flowing through the coil.
1) Li + ČI>LICI
How many atoms are in this?
Answer:
2 atoms
Explanation:
A passive continental margin has a ____, while an active margin does not.
O A. continental rise
O B. continental slope
O C. continental duct
O D. continental shelf
A passive continental margin has a continental rise, while an active margin does not. Therefore, option A is correct.
What is passive continental margin?Where there is no plate border to mark the transition from land to sea, this is known as a passive continental margin.
A good example is the east coast of the United States, where the plate boundary is a distance from the shore along the mid-Atlantic ridge. Little geological activity occurs along passive borders.
Volcanoes, mountain belts, and earthquakes all identify active margins. They lack a continental uplift and an abyssal plain, in contrast to passive margins.
The Pacific and North American Plate boundaries are visible along the west coast of the United States, which is an example of an active margin. Where there is no plate border to mark the transition from land to sea, this is known as a passive continental margin.
Thus, option A is correct.
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In what two ways can we increase the potential difference?
How long will it take a rocket traveling at 8km/s to reach 20 km?
Answer:
2.5 seconds
Explanation:
20:8= 2.5 seconds
have a nice day! (^o^)
Answer:
2.5 seconds
Explanation:
20 ÷ 8 = 2.5
That's it.
Who may perform a post-exposure medical evaluation?
A) A licensed physician
B) An LPN
C) A physician's assistant
D) Your employer
Answer:a licensed physician
Explanation: taking the osha test now.
A licensed physician is the one to carry out a post-exposure medical evaluation. (Option A)
Post-Exposure Medical EvaluationPost-exposure Medical Evaluation is any medical evaluation started after exposure to a pathogen in order to prevent the infection from occurring.
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what is the standard unit of velocity
Answer:
Explanation:
Meters per second
Answer:
m/s (meters per second)
Explanation:
plllllllllllssssss help will give brainiest if your get correct
Answer:
Electrical energy is transformed into heat and light energy
Explanation:
hope this helps
Mikel runs with a speed of 3 m/s for 45 seconds. How far does mikel run?
Answer:
d = s • t
3m/s • 45s and and the seconds will cancel out.
135 meters
Answer:
velocity=3m/s
time=45sec
displacement=?
Explanation:
we have
velocity=displacement/time
3m/s=displacement/45
displacement=3×45=135m
Mikel runs 135m far.
Can anyone help with this physics question
Why is oxygen more chemically reactive than nitrogen?
A. Oxygen needs to gain only 2 electrons to have a full octet, while
nitrogen needs to gain 3.
B. Oxygen needs to gain only 2 electrons to have a full octet, while
nitrogen needs to lose 3.
C. Oxygen needs to lose only 2 electrons to have a full octet, while
nitrogen needs to lose 3.
D. Oxygen needs to lose only 2 electrons to have a full octet, while
nitrogen needs to gain 3.
Oxygen is more chemically reactive than nitrogen because Oxygen needs to gain only 2 electrons to have a full octet, while nitrogen needs to gain 3. The correct option is A.
What are electrons?The electrons are the spinning objects around the nucleus of the atom of the element in an orbit.
Valence electrons are the electrons present in the outermost shell of an atom. They can easily be determined by the number of valence electrons in an atom by looking at the specific group in the periodic table.
The fewer number of electrons in the valance shell, the more reactive is the element.
Oxygen needs to gain only 2 electrons to have a full octet, while nitrogen needs to gain 3.
Thus, Oxygen is more chemically reactive than nitrogen.
Then the correct option is A.
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Answer:
A
Explanation:
Apex built different
30 points!!
Electricity seems like a fundamental element in the construction of any home. However, to have electricity run into and out of a home, there must be a complete circuit. Write a brlef essay describing the minimum requirements for any electric circuit. Within your essay, describe the task for each of these elements using your lessons and experience
within this virtual lab.
At least 150 words needed.
•Most of the components that make up curcuits are conductors. Electricity flows easily thought conductors such as metal or water.Electricity does not flow easily thought insulators such as wood or rubber.
•When a battery is used to power a circuit, the circuit the current must travel from one pole of the battery to the opposite battery.
•Resisotors show the flow of Electricity throught a circuit this can prevent components of the circuit from 'brning out'. In a curcuit diagram, resistors are represented by bending lines.
Question 7 of 10
In terms of a story's ending, what is a "twist"?
A. To have the characters become lost on a winding road or path
B. To weave together different fictional elements in a specific pattern
C. To write an ending that is too random for the reader to be satisfied
D. An event that a reader probably wouldn't have been able to predict
SUBMIT
Answer:
D
Explanation:
a twist is an event that a reader probably wouldn't have been able to predict
all energy,potential kinetic within a specific system
a)joule
b) total energy
c) potential energy
Answer:
C
Explanation:
The potential and kinetic energy within a specific system is called the total energy of the system.
Option B is the correct answer.
Potential and Kinetic EnergyThe energy of the specific system due to its steady position is defined as the potential energy of the system.
The energy of the system which is stored due to the motion of the system is called the kinetic energy of the system.
The mechanical energy of the system is the total energy within the system including its kinetic and potential energy.
The sum of kinetic and potential energy is known as mechanical energy. An object's mechanical energy is defined as the total energy which is stored during its steady position and stored during the motion of the object.
Hence we can conclude that option B represents the correct answer for the given statement.
To know more about the potential and kinetic energy, follow the link given below.
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A car accelerates from 20.0 m/s to 28.0 m/s over a distance of 50.0 m. What is the car’s acceleration?
Answer:
Explanation:
[tex]V^2=V^2_o+2a(x_f-x_i)[/tex]
[tex]28^2=20^2+2a(50)\\784=400+100a\\384=100a\\a=3.84m/s^2[/tex]
Help ASAP
Frank uses a bowling ball to demonstrate how energy can cause changes. Which
of the following actions would NOT demonstrate a change caused by applying
energy to the ball?
O He spins the bowling ball with one hand
O He rolls the bowling ball across the floor
O He holds the bowling ball in both hands
He lifts the bowling ball to place it on a shelf.
Answer:
he holds the ball in both hands
Explanation:
he's not moving the ball
4. What will happen to the amount of kinetic energy if an object's mass
decreases?
A. The kinetic energy will increase I
B. The kinetic energy will decrease
C. The kinetic energy will remain constant
What happens to water molecules when a large quantity of thermal energy is added to water in the liquid state?
What does the potential energy of an object depend on?
Answer:
The amount of gravitational potential energy an object has depends on its height and mass. The heavier the object and the higher it is above the ground, the more gravitational potential energy it holds.
Hope this helps :)