Answers
Answer:
i think the answer is -3m/s2 as there written no sign so it will be 3m/s2
Explanation:
we can see its an uniform decelaration
so we know
a=v-u/t
or a=2-26/8-0
so a =-24/8
so a=-3m/s2
Related Questions
SCIENCE
Why is the nervous system in the human body a system?
A. It is made of tissues that can conduct electricity, a required function in a system.
B. Like all systems, the nervous system is contained within a living organism.
C. It is made of several components that act interdependently to perform a function as a whole.
D. The nervous system acts together with other systems to control a larger organism
Answers
Answer:
A. It is made of tissues that can conduct electricity, a required function in a system.
Explanation:
The nervous system helps all the parts of the body to communicate with each other. It also reacts to changes both outside and inside the body. The nervous system uses both electrical and chemical means to send and receive messages.
Answer:
D
Explanation:
it is D because a system needs to manage a large organism like us to allow us to live, therefore, needs to work with other systems to keep us alive
The drop across a resistor means that there is a change in potential or voltage across the resistor. is there any change in current as it passes through a resistor? explain.
Answers
No Change in Current as it passes through a resistor.
Explanation:When there is an IR drop across a resistor, the current flowing through the resistor causes a change in potential or voltage across the resistor. based on Ohm's law
V = RI
where V is the resistance's voltage.
resistance, or R
I = present
R is now known to be constant.
The applied voltage also affects the current for a particular resistance.
Therefore, unless we change the resistance, no change in current is visible when current flows through a resistor.
When the IR drops across the resistor, the potential also drops using Ohm's law.
Thus, the potential energy of the electrons across the resistor drops. But the kinetic energy of the electrons remains the same.
The current is defined by the rate of flow of electrons which remains the same as the kinetic energy did not change.
Hence, the current won't change while passing through the resistor.
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A high way is built using concrete slabs 12m long at 20°C.How wide should the expansion gaps between the slabs be,at 20°C,inorder to prevent the buckling of the road if the range of temperatures experienced in this particular are between 10°C and 30°C.
Answers
Given,
The length of the slab, L=12 m
The initial temperature, T₁=10°C
The final temperature, T₂=30°C
The coefficient of the linear expansion of the concrete is α=12×10⁻⁶ /°C
The change in the length of the slab is given by,
\(\Delta L=\alpha L\times\Delta T\)Where ΔT is the change in the temperature.
Therefore,
\(\Delta L=\alpha L\times(T_2-T_1)\)On substituting the known values,
\(\begin{gathered} \Delta L=12\times10^{-6}\times12\times(30-10) \\ =2.88\times10^{-3}\text{ m} \\ \approx0.003\text{ m} \end{gathered}\)Thus the expansion in the length of the slab in the given temperature range is 0.003 m.
Thus the gap between the slabs should be 0.003 m
A solid disk of radius 9.50 cm and mass 1.15 kg, which is rolling at a speed of 1.40 m/s, begins rolling without slipping up a 6.00
∘
slope. How long will it take for the disk to come to a stop?
Answers
The disk will come to a stop after about 5.5 seconds.
The disk's initial kinetic energy is a combination of rotational and translational energy. As it begins to move up the slope, it experiences an opposing force of friction that acts in the opposite direction of the motion. This force causes the disk to decelerate and ultimately come to a stop.
The amount of frictional force acting on the disk depends on the normal force, which is equal to the gravitational force acting on the disk. By using conservation of energy principles, we can calculate the work done by friction to bring the disk to a stop.
This work is equal to the change in kinetic energy of the disk. Using the work-energy theorem, we can then find the time it takes for the disk to stop. In this case, the disk will come to a stop after about 5.5 seconds.
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Hello pls help me if possible
Answers
Answer: The x-component of the acceleration is \(-0.45m/s^{2}\)
There u go (:
Momentum is a quantity that we say is typically _______________ in collisions.
A. Conserved
B. Lost
C. Disappeared
D. Gained
Answers
Momentum is a quantity that we can say is typically conserved in collisions.
Momentum is the quantity that that we see typically conserve in the collision,therefore the correct answer is the option A
What is elastic collision?
It is the type of collision in which the total momentum as well as the kinetic energy on the system is conserved .The momentum before the collision is equal to the momentum after the collision in other words one can say in the elastic collision momentum of the quantity is conserved.
In the inelastic collision the momentum is conserved but the kinetic energy of the quantity is not conserved.
Momentum of a quantity is conserved irrespective of the type of collision whether it will be elastic collision or inelastic collision the momentum of the quantity will always be conserved.
Hence,we can say that momentum is the quantity that is conserved in collision,The correct answer for the given problem is option A.
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moment of inertia of an object does not depend on a. angular velocity b. mass distribution
Answers
Answer:
Explanation:
The moment of inertia of an object is a property that describes its resistance to rotational motion.
It is determined solely by the mass distribution of the object and the geometry of its shape, and it does not depend on the angular velocity of the object.
This can be seen from the formula for the moment of inertia, which is given by:I = ∫ r^2 dmwhere I is the moment of inertia, r is the distance from the axis of rotation to the mass element dm, and the integral is taken over the entire mass distribution of the object.
The moment of inertia depends only on the mass distribution of the object and how that mass is distributed around the axis of rotation.
This means that even if the object is rotating at different speeds or in different directions, its moment of inertia will remain the same, as long as the mass distribution is unchanged.
What makes a method accurate or inaccurate?
Answers
Answer:
Accuracy is how far off a measurement is from its true value. A measured value that's far from a true value is inaccurate, while a measure that is close to a true value is accurate.
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can someone help with the blank questions please?
Answers
Can someone tell me what they think reliability means ?
Answers
Answer:
it is being accountable basically like some one can relive and trust that you'll do what you say your going to do
What weather tool is generally used for research more than forecasting?
Answers
Answer:Thermometer
Explanation:
When testing water for chemical impurities, results are often reported as bdl, that is, below detection limit. The following are the measurements of the amount of lead in a series of water samples taken from inner-city households (in parts per million): 5, 7, 12, bdl, 10, 8, bdl, 20, 6 Which of the following statements can we be sure is true? (a) The mean lead level in the water is about 10 ppm. (b) The mean lead level in the water is about 9 ppm. (c) The median lead level in the water is 7 ppm. (d) The median lead level in the water is 8 ppm. (e) Neither the mean nor the median can be computed because some values are unknown.
Answers
Answer:
The median lead level in the water is 7 ppm.
Explanation:
the different phases of the moon are caused by the moon's near 28-day_
Answers
Answer:
lol
Explanation:
if the resistor in the emitter leg is bypassed by a capacitor then the voltage gain of the small signal amplifier will . decrease increase in some cases and decrease in other cases stay the same increase
Answers
In conclusion, if the resistor in the emitter leg of a small signal amplifier is bypassed by a capacitor, the voltage gain of the amplifier will increase. This is because the bypass capacitor allows the AC signal to bypass the resistor, increasing the effective emitter resistance and consequently boosting the voltage gain.
If the resistor in the emitter leg of a small signal amplifier is bypassed by a capacitor, the voltage gain of the amplifier will increase. This is because the bypass capacitor allows the AC signal to bypass the resistor, effectively shorting it out for AC signals.
When the resistor is bypassed, the emitter current will flow through the bypass capacitor instead of the resistor. This increases the effective emitter resistance, which in turn increases the voltage gain of the amplifier.
To understand this concept, let's consider a practical example. Imagine we have a small signal amplifier with a bypass capacitor in the emitter leg.
When an AC signal is applied to the input, the bypass capacitor allows the AC component of the signal to flow through, while blocking the DC component. As a result, the AC signal bypasses the resistor and flows through the capacitor, causing an increase in the voltage gain of the amplifier.
In conclusion, if the resistor in the emitter leg of a small signal amplifier is bypassed by a capacitor, the voltage gain of the amplifier will increase. This is because the bypass capacitor allows the AC signal to bypass the resistor, increasing the effective emitter resistance and consequently boosting the voltage gain.
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Can anyone explain alpha decay?
Explain beta decay
Answers
Explanation:
Beta decayRadioactive decay
In nuclear physics, beta decay is a type of radioactive decay in which a beta particle is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide
Answer:
In alpha decay, mass number of the nucleus decreases by 4 unit and atomic number is decreased by 2 unit. Alpha decay : ZAX→Z−2A−4Y+24He. When a parent nucleus emits an electron (beta particle) along with the daughter nucleus, then the nuclear reaction thus is called as beta decay.
a spring gun can give a ball kinetic energy K when compressed by x. If compressed by 2x, what kinetic energy can it give to the ball?
Answers
ANSWER
\(\begin{gathered} K_{2x}=4K \\ or \\ K_{2x}=2kx^2 \end{gathered}\)EXPLANATION
The kinetic energy of a spring is equivalent to the elastic potential energy, which means that the kinetic energy of a spring is given as:
\(K=\frac{1}{2}\cdot k\cdot x^2\)where k = spring constant
x = amount of compression
Therefore, when the compression is 2x, the kinetic energy it can give the ball is:
\(\begin{gathered} K_{2x}=\frac{1}{2}\cdot k\cdot(2x)^2 \\ K_{2x}_{}=\frac{1}{2}\cdot k\cdot4x^2 \\ K_{2x}=4(\frac{1}{2}\cdot k\cdot x^2)\Rightarrow2kx^2 \\ \Rightarrow K_{2x}=4K \end{gathered}\)Find the beat frequency produced by the following two traveling waves (in Hz - assume all Sl units): y(x, t) = 4 cos(8x + 16t) y (x, t) = 5 cos(12x + 46nt)
Answers
The beat frequency produced by the two travelling waves is |16 - 46n| / (2π) Hz.
To find the beat frequency produced by the two travelling waves, we need to determine the difference in their frequencies. The general form of a travelling wave is given by y(x, t) = A cos(kx - ωt + φ), where A is the amplitude, k is the wave number, ω is the angular frequency, and φ is the phase constant.
For the first wave, y₁(x, t) = 4 cos(8x + 16t), the angular frequency is ω₁ = 16 rad/s.
For the second wave, y₂(x, t) = 5 cos(12x + 46nt), the angular frequency is ω₂ = 46n rad/s.
The beat frequency (f_b) is equal to the absolute difference between the two angular frequencies divided by 2π:
f_b = |ω₁ - ω₂| / (2π)
Substituting the values, we have f_b = |16 - 46n| / (2π) Hz, where n represents the unitless constant in the second wave.
Therefore, the beat frequency produced by the two travelling waves is |16 - 46n| / (2π) Hz.
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Which occupation is not an example of specialization?
A waiter
B journalist
C student
OD carpenter
Answers
Answer:
A waiter
Explanation:
Specialization is the process of concentrating on and becoming an expert in a particular subject or skill. It can also be used to refer to the area on which someone becomes an expert. All the other options require years of gradual learning that builds up over the years for one to be considered an expert, asides for that of a "waiter"
Waiting does not require much training, and cannot be referred to as an area of specialization.
Answer:
student
Explanation:
it's the only one that is not an example of specialization.
lighting converts ... energy, into ... energy.
Answers
Explanation:
lighting converts heat energy.
hope you like this .
Energy emitted as a result of atomic activity and dispersed at high velocity through matter and space is known as:______
Answers
Energy emitted as a result of atomic activity and dispersed at high velocity through matter and space is known as radiation. It encompasses electromagnetic waves and particles and has various applications but can also be harmful in excessive amounts.
The energy emitted as a result of atomic activity and dispersed at high velocity through matter and space is known as radiation. Radiation can take various forms, including electromagnetic waves such as gamma rays, X-rays, ultraviolet rays, visible light, infrared rays, microwaves, and radio waves. It can also include particles such as alpha particles, beta particles, and neutrons.
Radiation is generated by processes like radioactive decay, nuclear reactions, and high-energy collisions. These processes release energy in the form of electromagnetic waves or particles. This energy then travels through space and matter, including air, solids, and liquids.
Radiation has a wide range of applications, including medical imaging, cancer treatment, nuclear power generation, and communication. However, it is important to note that exposure to high levels of radiation can be harmful to living organisms, causing damage to cells and DNA.
In conclusion, energy emitted as a result of atomic activity and dispersed at high velocity through matter and space is known as radiation. It encompasses electromagnetic waves and particles and has various applications but can also be harmful in excessive amounts.
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23. As the frequency of a wave increases, the period of the wave
Answers
Answer: decreases
Explanation: As frequency increases the period of a wave decreases because they have an inverse relationship. The equation for wave period (T) is the inverse of the frequency (f). So, as frequency increases, the value for period will decrease accordingly.
What happens when a soccer player commits a foul ?
a - the opposite team gets a throw in the ball
b - the opposite team gets a free kick
c - the opposite team gets a point
Answers
Answer:
b - the opposite team gets a free kick
Explanation:
for a planar surface, the direction of dip is always _______ degrees to the direction of strike.
Answers
For a planar surface, the direction of dip is always perpendicular (90 degrees) to the direction of strike.
In geology, the strike and dip are measurements used to describe the orientation of a planar rock surface, such as a bedding plane or fault. The strike represents the horizontal direction of the line formed by the intersection of the rock surface with a horizontal plane. The dip, on the other hand, represents the angle of inclination of the rock surface from the horizontal plane. In a planar surface, the dip is always perpendicular to the strike. This means that if the strike is in a particular direction, the dip will be at a right angle (90 degrees) to that direction.
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PLEASE HELP BRAINLIEST
Answers
\(\huge\boxed{\text{Marble D}}\)
_____________________________________Kinetic Energy:The energy possessed by the object due to its motion.
\(\texttt{K.E} = \frac{1}{2}\texttt{m}V^2\\\\\texttt{Where,}\\\\\texttt{m is mass}\\\\\texttt{V is speed}\) \(\texttt{K.E = \frac{1}{2}mV^2}\) _____________________________________Question:The kinetic energy of the body depends on the mass and velocity. As the question says the velocity of all the marbles is same thus only masses depends the kinetic energy of the marbles. The mass of Marble D is the more than the other marbles thus it will have the most Kinetic Energy.
Lets consider all the marbles have the same speed that is 5 m/s
\(\text{Kinetic Energy of Marble A}\\\\\texttt{K.E} = \frac{1}{2}\texttt{x1x}5^2\\\\\texttt{K.E} = 12.5 \ J\)
\(\text{Kinetic Energy of the Marble D}\\\\\texttt{K.E} = \frac{1}{2}\texttt{x 2.5 x} \ 5^2\\\\\texttt{K.E} = 31.25 J\)
_____________________________________Best Regards,'Borz'Name of a body that changes Chemical energy to electric energy.
Answers
Answer:
battery
Explanation:
A battery contains stored chemical energy and converts it to electrical energy. (cK.12)
Answer:
battery is the correct answer for this question
which color of visible light would have the least energy? which would have the most energy? how do you know?
Answers
The color of visible light that would have the least energy is red. On the other hand, the color of visible light that would have the most energy is violet.
This is because red light has the longest wavelength and the lowest frequency out of all the colors in the visible spectrum. Violet light has the shortest wavelength and the highest frequency out of all the colors in the visible spectrum.
This relationship between wavelength, frequency, and energy can be explained by the relationship between electromagnetic waves and energy. All electromagnetic waves, including visible light, have a certain amount of energy that is proportional to their frequency. The higher the frequency, the more energy the wave has.
This relationship can also be seen in the electromagnetic spectrum, where higher energy waves (such as X-rays and gamma rays) have shorter wavelengths and higher frequencies, while lower energy waves (such as radio waves) have longer wavelengths and lower frequencies.
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geoffrey is on location for a long shoot. he is worried that the battery power in his camera will not last. which sources can he use to avoid losing total battery power?
Answers
Geoffrey can use various sources to avoid losing total battery power for his camera during a long shoot. Some options include: Geoffrey can carry spare batteries with him to swap them out when the current battery runs low.
This ensures that he always has a fully charged battery available. Battery grip: A battery grip is an accessory that can be attached to the camera and holds extra batteries. This allows Geoffrey to switch between batteries without interrupting the shoot.
Portable power bank: Geoffrey can use a portable power bank to charge his camera battery on the go. These power banks are easy to carry and can provide multiple charges, extending the camera's battery life. AC power adapter: If there is access to a power outlet nearby, Geoffrey can connect his camera to it using an AC power adapter. This way, he can shoot without worrying about battery drain. By utilizing these sources, Geoffrey can prolong his camera's battery life and ensure he doesn't lose total power during his long shoot.
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A nurse takes the pulse of a heart and determines the heart beats periodically 60 times in 60 seconds. The period of her heartbeat is
A: 1 Hz
B: 60 Hzx
C: 1 s
D: 60 s
Answers
The nurse determined that the heart beats periodically 60 times in 60 seconds, which means that the heart beats once every second. which in this case is one heartbeat. the period of the heartbeat is 1 second.
Therefore, the period of the heartbeat is 1 second. Option A (1 Hz) is incorrect because 1 Hz refers to the frequency, which is the number of cycles per second, not the period. Option B (60 Hz) is incorrect because it is an extremely high frequency that is not consistent with the human heartbeat. Option D (60 s) is incorrect because it is too long of a period for one heartbeat.
"A nurse takes the pulse of a heart and determines the heart beats periodically 60 times in 60 seconds. The period of her heartbeat is The period of her heartbeat is C: 1 s.
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two earthquake waves of the same frequency travel through the same portion of the earth, but one is carrying 2.7 times the energy.
Answers
The earthquake waves of the same frequency travel through the same portion of the Earth, but one carries 2.7 times the energy of the other, the wave with higher energy will have a greater amplitude, while their frequencies will remain the same.
When two earthquake waves of the same frequency travel through the same portion of the Earth, but one wave carries 2.7 times the energy of the other wave, the amplitude of the wave carrying more energy will be greater.
Amplitude refers to the maximum displacement of particles from their resting position in a wave. The higher the amplitude, the greater the energy carried by the wave.
Frequency, on the other hand, refers to the number of complete waves that pass a given point in one second.
It is measured in hertz (Hz). In this case, since both waves have the same frequency, the number of complete waves passing a point in one second will be the same for both waves.
So, to when two earthquake waves of the same frequency pass through the same area of the Earth, but one of them has 2.7 times the energy of the other, the wave with the higher energy will have a larger amplitude while the frequency of the other wave will not change.
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describe how a volcano is formed at a continental rift
Answers
Volcanoes are formed due to geological activity inside the Earth’s crust, where magma rises to the surface and outflows onto the ground surface. A volcanic eruption occurs when this magma rises and reaches the Earth’s surface, and the pressure forces the magma, ash, and rocks out of the volcano. Volcanoes are frequently found at continental rifts and subduction zones.
How a volcano is formed at a continental rift?A continental rift is a linear zone where the Earth's crust and lithosphere are slowly tearing apart. Magma increases in the space between the two drifting tectonic plates as they split apart. The pressure builds up over time, and eventually, it becomes too much for the magma to handle. As a result, the magma rises to the surface and erupts as a volcano. Lava flows occur during a rift eruption, and fissures might open in the ground, allowing lava to spill out onto the surface. Lava fountains and lava lakes may form as the lava flows through channels. The magma's composition varies depending on the location of the volcano and the type of rift.Volcanic eruptions at continental rifts are usually non-explosive and less harmful than those at subduction zones.#SPJ11
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