Answers
Given information:
Height covered;
\(x=0.749\text{ m}\)The third equation of motion is given as,
\(v^2_f=v^2_i+2ax\ldots(1)\)Here, v_f is the final velocity, v_i is the initial velocity, a is the acceleration (during upward motion a=-g; g is the acceleration due to gravity) and x is the jump height.
At maximum height the final velocity v_f will be zero i.e.,
\(v_f=0\)Therefore, from equation (1),
\(\begin{gathered} 0^2=v^2_i-2gx \\ v^2_i=2gx \\ v_i=\sqrt[]{2gx} \end{gathered}\)Substitute 9.81 m/s² for g and 0.749 m for x,
\(\begin{gathered} x=\sqrt[]{2\times(9.81\text{ m/s}^2)\times(0.749\text{ m})} \\ \approx3.83\text{ m/s} \end{gathered}\)Therefore, the initial velocity is 3.83 m/s.
Related Questions
Please help I can’t fail
Answers
Answer:
photosynthesis, burning fossil fuels, and simply releasing breath from the lungs.
How much work must be done to stop a 900-kg car traveling at 106 km/h?(Hint: You will need to convert the speed first.)Answer: ___________ J (round to the nearest whole number)
Answers
The work needed to stop an object is equal to the kinetic energy of the object:
\(K=\frac{1}{2}mv^2\)Write the speed in meters per second using the fact that 1m/s=3.6km/h. Then, the work needed to stop the car is:
\(W=\frac{1}{2}(900kg)\left(106\frac{km}{h}\times\frac{1\frac{m}{s}}{3.6\frac{km}{h}}\right)^2=390,138.88...J\)Therefore, the work that must be done to stop the car is approximately 390,139J.
Discuss the circuits.
Name all the
components. What
will happen to bulb
B1 if the bulb B2 is
replaced with
connecting wire in
each circuit?
Answers
The series circuit has components connected in a sequence, while the parallel circuit has components connected in different branches. If bulb B2 is replaced with a wire in the series circuit, bulb B1 will not light up, while in a parallel circuit, it will still light up.
Circuits are basically the pathways that allow the flow of electric current. These circuits have different components. In this context, there are two circuits, the series circuit, and the parallel circuit. The series circuit has bulbs connected in a sequence where current flows through each bulb in turn. In contrast, the parallel circuit has bulbs connected to different branches. The current flows through each bulb separately.In a series circuit, the components are a power source, resistors, and wires. A power source can be a battery or a generator that is connected in a sequence with resistors and wires. The bulbs B1 and B2 are connected in series. If bulb B2 is replaced with a connecting wire, then the circuit will become incomplete, and bulb B1 will not light up. This is because in a series circuit, if one component is disconnected, the entire circuit becomes open, and the current stops flowing. Thus, if bulb B2 is replaced with a wire, the current will bypass the bulb, and the circuit will become incomplete. In a parallel circuit, the components are a power source, resistors, and branches. The bulbs B1 and B2 are connected in parallel. If bulb B2 is replaced with a connecting wire, the circuit will still work. This is because in a parallel circuit, each bulb has its branch, and the current flows through each bulb separately. Thus, if bulb B2 is replaced with a wire, the current will still flow through bulb B1, and it will light up.For more questions on the series circuit
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In an experiment, a research collected the following informationabout a solution made from a certain
food. What can we conclude about the food?
• pH = 3.0
• Taste = Sour
A. Acid
B. Base
C. Neutral
D. Salt
Answers
Answer:
salt
Explanation:
monochromatic light of wavelength is incieentr ona lsit of width the distance from the slit ot a screen is
Answers
According to the given statement the width of the center maximum is 0.0077 m.
What are frequencies and wavelengths?The distance between two wave crests, which also applies to troughs, is known as the wavelength. Cycles per second (Hz), the number of vibrations that pass across a certain region in a second, is used to measure frequency (Hertz). The link between frequency and wavelength is discussed in this article.
By measuring the separation between two identical locations on adjacent waves, the wavelengths can always be found. When determining the wavelength of a waveguide, the distance from one compress to the next or from one deformation to the next is measured.
Briefing:d=580nm=580×10 −9 m
d=0.3mm=0.0003m
width of the cental maxima
= 2λD/ d
= 2 * 580 * 10-9 * 2 / 0.0003
= 0.0077 m
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The complete question is -
Monochromatic light of wavelength 580 mm incident on a slit of width 0.30 mm. The screen 2 m from the slit. the width of the center maximum is
Cual es la Ecuación de velocidad de una onda en función del índice de la amplitud de una cuerda
Answers
Answer:
Well velocity is the varaible with direction
Explanation:
A 0.8 kg object that stretches a spring 8.8 cm from its natural length when hanging at rest oscillate with a amplitude of 2.9 cm. Find the total energy of the system
Answers
The tοtal energy οf the system is 0.0181 J. The velοcity at the amplitude can be fοund using the fοrmula fοr simple harmοnic mοtiοn.
What is Energy?Energy plays a crucial rοle in virtually every aspect οf οur lives and is invοlved in everything frοm the mοvement οf οbjects tο the functiοning οf οur cells and οrgans. Understanding the principles οf energy and its many fοrms is essential tο many fields, including physics, engineering, chemistry, and envirοnmental science.
Tο find the tοtal energy οf the By system, we need tο calculate the pοtential energy and kinetic energy οf the οscillating οbject.
\(U = (1/2) k x^2\)
In this case, the displacement is the amplitude οf οscillatiοn, which is 2.9 cm οr 0.029 m. The spring cοnstant can be fοund using the fοrmula:
k = F/x
The fοrce can be calculated frοm the weight οf the οbject:
F = m g
where m is the mass οf the οbject and g is the acceleratiοn due tο gravity \((9.81 m/s^2)\). Therefοre,
\(F = 0.8 kg \times 9.81 m/s^2 = 7.848 N\)
The spring cοnstant is then:
k = F/x = 7.848 N / 0.088 m = 89.09 N/m
The pοtential energy οf the spring at the maximum displacement (amplitude) is:
\(U = (1/2) k x^2 = (1/2) \times 89.09 N/m \times (0.029 m)^2 = 0.0122 J\)
The kinetic energy οf the οscillating οbject can be fοund using the fοrmula:
\(K = (1/2) m v^2\)
where v is the velοcity οf the οbject at any pοint during the οscillatiοn. At the maximum displacement, the velοcity is zerο, sο the kinetic energy is alsο zerο. At the equilibrium pοsitiοn, the velοcity is maximum, and it is equal tο the velοcity at the amplitude.:
v = ω A
where ω is the angular frequency οf the οscillatiοn, and A is the amplitude. The angular frequency can be fοund using the fοrmula:
ω = √(k/m)
Therefοre,
ω = √(89.09 N/m / 0.8 kg) = 4.195 rad/s
and
v = ω A = 4.195 rad/s × 0.029 m = 0.1217 m/s
The kinetic energy at the amplitude is then:
\(K = (1/2) m v^2 = (1/2)\times 0.8 kg \times (0.1217 m/s)^2 = 0.0059 J\)
The tοtal energy οf the system is the sum οf the pοtential and kinetic energies:
E = U + K = 0.0122 J + 0.0059 J = 0.0181 J
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The specific heat of human body is 3,500 J/kg/°C. When a 84 kg person runs, she generates 3.6 MJ of heat in an hour. Suppose she did not sweat. Find the rise in body temperature in °C.
Answers
The rise in temperature of the body as determined from the specific heat capacity, mass, and heat change of the body is 12.24 °C.
What is the rise in temperature of the body?The rise in temperature of the body is determined from the specific heat capacity, mass, and heat change of the body.
The formula relating the temperature rise of the body, the specific heat capacity, mass, and heat change of the body is given below:
Heat change = mass * specific heat capacity * temperature rise
Temperature rise = Heat change / mass * specific heat capacity
Temperature rise = 3.6 * 10⁶ J / 84 kg * 3,500 J/kg/°C
Temepartaure rise = 12.24 °C
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Question 2 of 10
How does the intensity of a sound wave change if the distance from the
source is reduced by a factor of 4?
A. The intensity decreases by a factor of 4.
B. The intensity increases by a factor of 4.
C. The intensity decreases by a factor of 16.
OD. The intensity increases by a factor of 16.
Answers
The intensity increases by a factor of 16.
option D.
What is inverse square law?According to the inverse-square law of sound propagation, the intensity of a sound wave decreases proportionally to the square of the distance from the source.
I ∝ 1/r²
where;
r is the distanceI is the intensity of the soundwhen distance from the source is reduced by a factor of 4, the intensity of the sound wave becomes;
I ∝ 1/4²
I ∝ 1/16
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H.W
Two low pass signals, each band limited 4KHz, are to be time
multiplexed into a single channel using PAM. Each signal is impulse
sampled at a rate 10KHz. The time multiplexed signal waveform is
filtered by an ideal LPF before transmission.
(a) What is minimum clock frequency of the system?
(b) What is the minimum cut off frequency of the LPF?
(c) In the receiver side, determine the minimum and maximum
acceptable bandwidth of the LPF used in retrieving the analog
signal?
Ans. (a) 20KHz (b) 10KHz (c) 4KHz, 6KHz.
Answers
Two low pass signals, each band limited 4KHz, are to be time-multiplexed into a single channel using PAM. Each signal is impulse sampled at a rate 10KHz. is mathematically given as
nCF= 10KhzminF=20HzminBL= 4Fz and maxBL=6KhzWhat is the minimum clock frequency of the system?Generally, the equation for the minimum clock frequency is mathematically given as
minF=2*F
Therefore
minF=2*10
minF=20Hz
b)
the minimum cut-off frequency of the LPF
nCF this simply depicts of specifies the sampling rate
Hence
nCF=fs
nCF= 10Khz
c)
The minimum and maximum acceptable bandwidth of the LPF
The minimum acceptable bandwidth depicts or specifies the sampling band limit.
minimum acceptable =Sampling band limit
minBL= 4Fz
The maximum acceptable bandwidth of the LPF is given by the impulse signal rate minus the value of the minimum band limit, Hence
maxBL=10khz - 4Khz
maxBL=6Khz
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Can anyone help with the attached question
Answers
The wave front, also known as the wavefront, is an imaginary surface that represents equivalent points of a wave that vibrate in sync. The correct option is D ; 2.0 .
What is a wavefront in physics?A wave front is described as a surface where the wave's phase remains constant. At any one time, all particles of the medium are moving in the same direction along a certain wave front. Two kinds of wave fronts are very essential. They are plane and spherical wave fronts, respectively. A wavefront is a surface on which the wave disturbance is in the same phase at all places. For example, the ripples of water created when a stone is tossed into a pond.
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A body of mass 2.00 kg is pushed straight upward by a 25.0 N vertical force. What is its acceleration
Answers
The acceleration on a body of mass 2kg with a force of 25N is 12.5 m/s^2
Mass and AccelerationGiven Data
Mass = 2 kgForce = 25NWe know that the expression for the Relationship between force acceleration and Mass is given as
F = ma----------------1
Substituting our given data into the expression we have
25 = 2*a
Making acceleration the subject of the formula we have
a = 25/2
a = 12.5 m/s^2
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Rita raises a 10kg package to a height of 2.5 m in 2.0 s.
(a) How much work did she do on the package?
(b) How much power was expended on the package?
(c) It she were to raise the package in 1.0 s rather than 2.0 s, how do the work and power change?
Answers
Answer:
A) W =250J B) Power = 125 J/s C) Work = 250 J Power = 250 J/s
Explanation:
Work = Force*distance
A:
\(W = 10kg*10m/s^2*2.5m\\W = 250 J\\\)
B:
Power is J/s
Power = 250J/2.0s = 125 J/s
C:
Work stays the same
Power increases to 250 J/s
This is the case study of a young man named Josh. Josh is a 27 year-old male who recently
moved back in with his parents after his fiancé was killed by a drunk driver. His fiancee, a
beautiful young woman he'd been dating for the past four years, was walking across a busy
intersection to meet him for lunch one day. He still vividly remembers the horrific scene as
the drunk driver ran the red light, plowing down his fiancé right before his eyes. He raced
to her side, embracing her crumpled, bloody body as she died in his arms in the middle of
the crosswalk. No matter how hard he tried to forget, he frequently finds himself reliving
the entire incident as if it was happening all over.
Since the accident, Josh has been plagued with nightmares about the accident almost
every night. He had to quit his job because his office was located in the building right next
to the little cafe where he was meeting his fiancé for lunch the day she died. The few times
he attempted to return to work were unbearable for him. He has since avoided that entire
area of town.
Normally an outgoing, fun-loving guy, Josh has become increasingly withdrawn, "jumpy",
and irritable since his fiancé's death. He's stopped working out, playing his guitar, or play-
ing basketball with his friends - all activities he once really enjoyed. His parents worry
about how detached and emotionally flat he's become.
Answers
The periodic table is an arrangment of the chemical elements, ordered by atomic number, into families, and by doing so illustrates the periodic properties of the elements. If we review the elements found in the second column of the periodic table, the alkali earth metals, we know one characteristic common to all elements in this family, besides being metals, is that they are
Answers
Answer:
Solid at room temperature
Explanation
Since these elements are metals they must be said at room temperature
Question 9(Multiple Choice Worth 4 points) (05.03 LC) What most likely happens when water vapor cools? It changes into gas. It changes into liquid. Its temperature increases. Its temperature remains constant.
Answers
Answer:
it changes into liquid
Answer:
It changes in to liquids
Explanation:
This is because the water vapor cools down and condenses it attaches it self to dust forming water droplets. Those water droplets are water.
Itzel travels south 4 miles and then goes east 2 miles and then north 10 miles. What is her displacement? Round your answer to two significant figures. a 7.1 miles NE b 5.1 miles SW c 6.3 miles SW d 5.5 miles SW e 6.3 miles NE f 0 miles g 7.1 miles SW h 5.5 miles NE i 5.1 miles NE
Answers
The displacement of Itzel according to the question is 6.3 miles SW
Displacement is defined as the distance moved by a body in a specified direction
Find the diagram attached
From the diagram given, we can see that AB is the displacement
To get the length AB, we will have to use the Pythagoras theorem:
\(AB^2=2^2+ 6^2\\AB^2 ^2=4+36\\AB^2=40\\AB=\sqrt{40}\\AB= 6.3 miles\\\)
From the diagram, we can also se that the direction of the displacement in the South West direction.
Hence the displacement of Itzel according to the question is 6.3 miles SW
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How did ibn Sina changed the science of forces
Answers
Ibn Sina, also known as Avicenna, was a Persian polymath who made significant contributions to a wide range of fields, including philosophy, medicine, and science. However, his work in the field of the science of forces is not as well known as his contributions to other areas.
Ibn Sina's most significant contributions to the science of forces were in the field of mechanics, the study of motion and the forces that cause it. In his work, he described the concept of momentum, which is the product of an object's mass and velocity, and he also made important contributions to the study of the motion of projectiles.
However, it is important to note that while Ibn Sina made some important contributions to the science of forces, his work in this field was not as influential as the work of other scientists and philosophers, such as Sir Isaac Newton, who made more significant contributions to the development of the laws of motion and the theory of universal gravitation.
What is the stretch when you pull with a force of 2.3 N on a spring with a spring constant of 19 N/m?
Answers
Answer:
x=0.12 m
Explanation:
Use the equation F=kx and isolate x because that's what you're solving for (x=F/k). Plug in your given values for F and k and solve for x [x=(2.3 N)/(19 N/m)] and you get x=0.12 m.
help with this please
Answers
Answer:
I think that those are all true but I'm not completely sure.
All types of mass movement are caused by the force of
Answers
Answer:
Mass and Acceleration
Explanation:
The typical Force equation is:
F = ma
where m = mass, and a=acceleration.
Answer:
Gravity is the main force responsible for mass movements. Gravity is a force that acts everywhere on the Earth's surface, pulling everything in a direction toward the center of the Earth
Explanation:
do waves change direction when they travel from one material to another.
Answers
MCQ
................
Answers
Answer:
I think it would be (-7 C )..
Do charges exit a circuit with less energy than they had when they entered the circuit
Answers
A uniform solid cylindrical flywheel has a mass of 50 kg and a radius of 40 cm. The flywheel begins to rotate faster with an acceleration of 1.5 rad/s2. The kinetic energy of the flywheel after 1 minute of rotation is:
A. 16.2 KJ
B. 180 KJ
C. 40.5 KJ
D. 32.4 KJ
Answers
The kinetic energy of the flywheel after 1 minute of rotation, given that it has a mass of 50 and radius of 40 cm is 32.4 KJ (Option D)
How do I determine the kinetic energy?We'll begin by obtaining the velocity of the flywheel. This is shown below:
Radius (r) = 40 cm = 40 / 100 = 0.4 mAcceleration (a) = 1.5 rad/s² = 1.5 × 0.4 = 0.6 m/s²Time (t) = 1 minute = 1 × 60 = 60 sVelocity (v) = ?v = at
v = 0.6 × 60
v = 36 m/s
Finally, we shall determine the kinetic energy of the flywheel. Details below:
Mass (m) = 50 KgVelocity (v) = 36 m/sKinetic energy (KE) =?KE = ½mv²
KE = ½ × 50 × 36²
KE = 25 × 1296
KE = 32400 J
Divide by 1000 to express in KJ
KE = 32400 / 1000
KE = 32.4 KJ
Thus, the kinetic energy is 32.4 KJ (Option D)
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FM radio stations use radio waves with frequencies from 88.0 to 108 MHz to broadcast their signals. Assuming that the inductance in Figure 24.4 has a value of 6.00 × 10-7 H, determine the range of capacitance values that are needed so the antenna can pick up all the radio waves broadcasted by FM stations.
Answers
The range of capacitance values that are needed so the antenna can pick up all the radio waves broadcasted by FM stations is from 5.45 x 10⁻¹² H to 3.62 x 10⁻¹² H.
Resonance frequencyThe frequency at which the antenna can pick the radio waves broadcasted is known as resonance frequency.
At resonance frequency, the capacitive reactance is equal to inductive reactance.
Xc = Xl
\(\frac{1}{2\pi fC} = 2\pi fL\\\\4\pi^2 f^2 LC = 1\\\\C = \frac{1}{4\pi^2 f^2L}\)
where;
C is the capacitanceL is the inductancef is the frequencyWhen the frequency is 88 MHz, the capacitance is;
\(C = \frac{1}{4\pi^2 \times (88 \times 10^6)^2 \times (6\times 10^{-7})} \\\\C = 5.45 \times 10^{-12} \ H\\\\\)
When the frequency is108 MHz, the capacitance is;
\(C = \frac{1}{4\pi^2 \times (108 \times 10^6)^2 \times (6\times 10^{-7})} \\\\C = 3.62\times 10^{-12} \ H\\\\\)
Thus, the range of capacitance values that are needed so the antenna can pick up all the radio waves broadcasted by FM stations is from 5.45 x 10⁻¹² H to 3.62 x 10⁻¹² H.
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The answer by onyebuchinnaji is correct, except for the fact that the final answer is in Farad (F), not H.
Naming covalent compounds
P4S5
Answers
Answer:
what the heck is sakurfa
Explanation:
14. Name the 3 primary causes for the expected mass migration due to Climate
Change.
Answers
Answer: sea-level rise, extreme weather events, and drought, and water scarcity.
Explanation:
PLEASE HELP!!
To conclude, how would you explain
electromagnetic induction to a 5 year old?
words to include: magnets, electricity, and
change.
Answers
Answer:
fgdyauqushxhxxgxggxgxgxgsgsysysy
sysydyydydysysysysyxhxyt56fys7w727ueudu
Please help me with this question.
Answers
With 20 windings, the generator will produce a higher EMF and, consequently, a larger current. This increased current will provide more power to the light bulb, resulting in a brighter illumination compared to the dim illumination observed with only 5 windings.
When you increase the number of wire windings in the generator from 5 to 20, the effect on the light bulb will be a brighter illumination. The brightness of the light bulb is directly proportional to the number of windings in the generator.
By increasing the number of windings, you are increasing the amount of wire wrapped around the magnet. This results in a higher number of turns per unit length, leading to an increased magnetic flux passing through the wire coils.
According to Faraday's law of electromagnetic induction, a change in magnetic flux induces an electromotive force (EMF) in a conductor, which in this case is the copper wire. The induced EMF causes electric current to flow through the wire, creating a flow of electrons.
The 30-W light bulb requires a certain amount of electrical power to produce its specified brightness. With 20 windings, the generator will produce a higher EMF and, consequently, a larger current. This increased current will provide more power to the light bulb, resulting in a brighter illumination compared to the dim illumination observed with only 5 windings.
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