Answer:
The magnitude of the vector product of two vectors can be constructed by taking the product of the magnitudes of the vectors times the sine of the angle (<180 degrees) between them. The magnitude of the vector product can be expressed in the form: and the direction is given by the right-hand rule.
Answer:
The vector product of two vectors is a vector perpendicular to both of them. Its magnitude is obtained by multiplying their magnitudes by the sine of the angle between them.
Hansel pushes a 2 lb. box 5 feet in 20 seconds. How much work has he done?
Answer:
10
Explanation:
temperatures expressed in the kelvin scale are _____ higher than temperatures in the celsius scale.
a. 460°
b. 200°
c. 283°
d. 273°
Answer: d
Explanation:
Celsius temperatures can be negative while kelvin goes down to absolute zero and doesn’t go any lower, thus no negative numbers
Answer:
option (D)
Explanation:
The melting point of ice is 0 degree and the boiling point of water is 100 degree on Celsius scale. There are 100 divisions between the melting point and the boiling point.
The melting point of ice is 273 degree and the boiling point of water is 373 degree on Kelvin scale. There are 100 divisions between the melting point and the boiling point.
The relation between the Celsius scale and the Kelvin scale is
[tex]\frac{C - 0}{100}= \frac{K - 273}{100}[/tex]
So, K = C + 273
1. The speed and direction with which an object moves is its
It’s called velocity. Velocity is a vector quantity so it’s basically the same thing as speed but the difference is it’s speed in a certain direction.
Answer:
The speed and direction with which an object moves is its velocity.
Explanation:
Velocity is the speed of an object with a given direction.
Hope this helps.
The phase of mitosis during which the chromosome pairs line up
along the middle, or the equator, of the cell is called
a. anaphase
b. prophase
c. telophase
d. metaphase
\
Never mind. I got the answer, it was d
Yep the answer is d
Metaphase is characterized by sister chromatids lining up at the cell's equator, on a plane known as the metaphase plate, preparing for separation during anaphase.
Metaphase is the second stage of mitosis. During this stage, the sister chromatids, with their attached microtubules, line up along a linear plane in the middle of the cell. This is known as the metaphase plate, a plane through the center of the spindle on which the sister chromatids are positioned. The spindles, emerging from centrosomes at either end of the cell, are poised to pull apart the sister chromatids and distribute one from each pair to each side of the cell. The chromosomes are maximally condensed at this time, ensuring efficient separation during the subsequent phase of anaphase.
To balance a chemical equation we use______.
-coefficients
-subscripts
Answer:
Coefficients
Explanation:
Coefficients are used to balance chemical equations.According to the law of conservation of mass, the mass of the reactants in a chemical equation should be equivalent to the mass of the products.The conservation of mass is achieved in chemical equations is achieved through balancing chemical equations. Balancing chemical equations is a try and error of putting appropriate coefficients to the reactants or products to ensure that the number of atoms of each element are equal on the side of the reactants and that of products.Plz help, it for my science CFE.
Which of the following four fundamental forces is responsible for binding protons and neutrons together in the nucleus?
A. Electromagnetism
B. Weak nuclear force
C. Gravity
D. Strong nuclear force
Answer: The strong nuclear force.
Explanation: The strong force holds the protons and neutrons together in the nucleus. Despite being the strongest force, it has a very small range. (Think about how small an atom is) The strong force is thought to occur due to the exchange of pions between the protons and the neutrons. Since pions have a very short lifespan, the protons and neutrons must be very close to each other in order to exchange them. This phenomenon is what keeps the protons and neutrons so tightly binded together in the nucleus.
a wave travels at a speed of 793 m/s and has a wavelength of 2.3 meters. calculate the frequency of the wave
Answer:
344.8 Hz
Explanation:
The frequency of a wave is given by:
[tex]f=\frac{v}{\lambda}[/tex]
where
v is the speed of the wave
[tex]\lambda[/tex] is its wavelength
Here we have
v = 793 m/s
[tex]\lambda=2.3 m[/tex]
Substituting into the equation, we find
[tex]f=\frac{793 m/s}{2.3 m}=344.8 Hz[/tex]
State the 3 laws of motion
Answer:
Explanation:
Newton's first law of motion:
An object in motion stays in motion, and an object at rest stays at rest, until acted upon by an unbalanced force.
Newton's second law:
The net force on an object is equal to its mass times its acceleration.
Newton's third law:
For every action, there is an opposite and equal reaction.
What is the most significant factor in determining kinetic energy?
Answer:
The velocity
Explanation:
Kinetic energy of an object is directly proportional to the square of its velocity if mass if kept constant. Therefore, if the velocity is doubled the kinetic energy increases four times.
K.E= 1/2mv²
m is the mass of the object and v the velocity. This means that there must be motion for there to be kinetic energy.
HOW DO PROTONS, NEUTRONS AND ELECTRONS DIFFER?
The protons has the positive charge, neutron has no charges and electrons have the negative charge.
Explanation:
The basic difference between the particles of the atom are their charges and their orientation in the atom. The proton and the neutron are present in the nucleus of the atom whereas the electrons are at the periphery of the atom. The nucleus is stationary in orientation having proton and neutron in it, whereas the periphery as the electrons are moving. Electrons revolves around the nucleus.
Calculate the total resistance for a 650ohm , a 350 ohm , and a 1000 ohm resistor connected in series
Answer:
2000 ohms
Explanation:
Resisters in series just add.
Rt = R1 + R2 + R3
R1 = 650 ohm
R2 = 350 ohm
R3 = 1000 ohm
Rt = 650 + 350 + 1000
Rt = 2000 ohms.
The total effective resistance of several resistors in SERIES is just the sum of all the individual resistances.
So the effective resistance of 650Ω, 350Ω, and 1,000Ω in series is
Sum = (650Ω + 350Ω + 1,000Ω)
Sum = 2,000 ohms
The motion of an object thrown at an angle is__ motion.
The motion of an object thrown at an angle is projectile motion
Projectile(missile designed to be fired from rocket)
a bicycle is a compound machine, true or false
This is true. The break handles and brakes are levers and the seat adjustment (raise or lower) is a screw.
Answer:
True.
Explanation:
A bicycle is a compound machine.
in which region of the sun does energy move as waves that transfer from atom to atom
Answer:
Radiative zone
Answer:photosphere corona core radiative zone chromosphere convective zone. Radiative zone of the Sun does energy move as waves that transfer from atom to atom.
Explanation:photosphere corona core radiative zone chromosphere convective zone. Radiative zone of the Sun does energy move as waves that transfer from atom to atom.
100 POINTS!!!! ANSWER QUICKLY NOWWWW!!!! How does an electric motor convert electrical energy into mechanical energy? A. When current flows through the motor, it powers electromagnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the electrical energy available. B. When mechanical energy flows through the motor, it powers electromagnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the electrical energy available. C. When magnetism flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available. D. When current flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available.
Answer:
An electric motor converts electrical energy into mechanical energy. The process is as follows:
D. When current flows through the motor, it powers electromagnets that are attracted and repelled by the poles of permanent magnets in the motor. The movement of the electromagnets turns a rod in the motor, which makes the mechanical energy available.
3. Which subatomic particle(s) determines an atom's atomic number?
Answer:
The remainder of the hydrogen atom's mass comes from the positively charged proton. The atomic number of an element is the number of protons in its nucleus. Neutrons are neutral particles having a mass slightly greater than that of the proton. Different isotopes of the same element contain the same number of protons but differing numbers of neutrons.
Explanation:
The latent heat of vaporization of a substance is the amount of energy associated with doing which of the following to 1 kg of the substance?
(PLEASE HELP NEED ANSWER ASAP!!)
Answer:
B) Boiling it at its boiling point
Explanation:
As we know that the heat required to convert the given substance from liquid to vapor at its boiling point is known as latent heat of vaporization
So here we know that
[tex]Q = mL[/tex]
here we know that
[tex]L = \frac{Q}{m}[/tex]
so it is known as the heat required to boil the given substance of unit mass at its boiling point
so correct answer will be
B) Boiling it at its boiling point
Which is not a form of light?
Radio waves, Middle-C, and halitosis are not forms of light.
All of the above are forms of light. Therefore, the correct option is option D among all the given options.
What is light?Light as well as visible light is electromagnetic that is visible to the human eye. Here between infrared and ultraviolet ranges, visible light is commonly defined as having wavelengths of 400-700 nanometres (nm) or frequencies of 750-420 terahertz.
In physics, the term "light" can be used to more broadly characterize electromagnetic radiation of any wavelength, whether visible or not. Gamma rays, X-rays, microwaves, and radio waves are all forms of light in this sense. All of the above are forms of light.
Therefore, the correct option is option D.
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Your question is incomplete but most probably your full question was,
Which of the following is not a form of light?
A) radio waves
B) microwaves
C) x-rays
D) All of the above are forms of light.
E) None of the above is a form of light
what is the coefficient for titanium tetrachloride when the equation below is balanced?
the coefficient of TiCl4 would be 1
Describe the relationship between electricity and magnetism.
Sample Response: Electrical and magnetic fields occur together. A change in current induces a magnetic field. A change in magnetic field induces a current.
Answer:In the similar way, a changing magnetic field produces an electric current in a wire or conductor. The relationship between electricity and magnetism is called electromagnetism.
Explanation:
Final answer:
Electricity and magnetism are closely related, where changing electric currents produce magnetic fields and changing magnetic fields induce electric currents. This principle, known as electromagnetism, is fundamental to many technologies and reflects an underlying symmetry in nature.
Explanation:
The interconnection between electricity and magnetism is a cornerstone of the field of electromagnetism. These two phenomena are so intertwined that a change in electric current can produce a magnetic field, and conversely, a change in a magnetic field can induce electric current. This concept is crucial to many technological advances such as generators, transformers, and various electronic devices that are essential to modern life.
For instance, when an electric current flows through a wire, it creates a surrounding magnetic field. If this magnetic field varies, it can induce a current in another nearby circuit, a principle known as magnetic induction. This is the fundamental process behind the operation of electrical generators and transformers. Historical experiments, including those by scientists such as Michael Faraday and Joseph Henry, have shown that electricity can produce magnetism and vice versa.
An alien spaceship is 8*10^14 m away sends us a radio wave signal. How long does it take for the signal to reach us?
Answer:
[tex]2.67\cdot 10^6 s[/tex]
Explanation:
The radio signal travels to us at the speed of light, so at a speed of
[tex]c=3.0\cdot 10^8 m/s[/tex]
The distance between the spaceship and the Earth is
[tex]d = 8\cdot 10^{14}m[/tex]
Since the signal travel by uniform motion, we can write
[tex]d = vt[/tex]
where
t is the time the signal needs to reach the Earth
By solving the equation for t, we find
[tex]t=\frac{d}{v}=\frac{8\cdot 10^{14} m}{3.0\cdot 10^8 m/s}=2.67\cdot 10^6 s[/tex]
Which units are used to express kinetic energy?
meters
seconds
joules
newtons
Answer:
The SI units for energy is Joules.
Answer: Joules
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A rock is dropped from a vertical cliff. The rock takes 6.00 s to reach the ground below the cliff. What is the height of the cliff? (take g=10.0 m/s2)
Answer:
180 m
Explanation:
The rock follows a free-fall motion - so the vertical distance covered can be found by using the equation
[tex]h=\frac{1}{2}gt^2[/tex]
where
g = 10 m/s^2 is the acceleration due to gravity
t = 6.00 s is the time of the fall
Substituting these data, we find the height of the cliff:
[tex]h=\frac{1}{2}(10 m/s^2)(6.00 s)^2=180 m[/tex]
The height of the cliff from which the rock is dropped can be calculated using the formula h = 0.5*g*t². This gives us a calculated height of 180 meters.
Explanation:The problem you're dealing with is related to one of the basic physics equations of motion, specifically for an object under constant acceleration - in this case, the acceleration due to gravity. To find the height of the cliff, we can use the formula h = 0.5*g*t², where 'h' is the height, 'g' is the acceleration due to gravity (10.0 m/s² as provided), and 't' is the time it takes for the rock to hit the ground (6.0 seconds in this problem).
Plugging in the known values into the equation gives us h= 0.5*10.0*(6.0)² = 180.0 meters. This means the cliff is approximately 180 meters high.
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If a force of 10 N applied to an object with a mass of 1 kg, what is the acceleration of the object?
Answer:
10 m/s²
Explanation:
Newton's second law:
∑F = ma
10 N = (1 kg) a
a = 10 m/s²
Hans Selye’s general adaptation syndrome theory proposes that adaptation to stress occurs in how many stages?
Answer:
Adaption to stress occurs in three stages: alarm, fight or flight, exhaustion.
Explanation:
According to the general adaptation syndrome theory proposed by Hans Selye, the adaption to stress occurs in three stages which are:
1. alarm
2. fight or flight
3. exhaustion
This is a process which comprises of three stages that describes the physiological changes which a body undergoes when in stress (an emotional, mental and physical human response to a specific stimulus).
Hans Selye’s general adaptation syndrome theory proposes three stages of stress response: alarm reaction, stage of resistance, and stage of exhaustion. These stages depict how our body physiologically reacts and adapts to stressful situations.
Explanation:Hans Selye’s general adaptation syndrome theory proposes that adaptation to stress occurs in three stages. These stages include the alarm reaction, where the body's immediate reaction to a stressful situation occurs, the stage of resistance, where the body begins to adjust to the stressor, and the stage of exhaustion, where the body's resources become depleted due to prolonged exposure to the stressor. Understanding these stages can help individuals better manage and respond to stressors in their lives.
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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.
The change in the kinetic energy of the runner will be 1350 J. It is found by subtracting the kinetic energy during two different velocity.
What is kinetic energy?The energy of the body by the virtue of its motion is known as the kinetic energy of the body. It is defined as the product of half of mass and square of the velocity.
According to the law of conservation of energy, the total energy is defined as the sum of kinetic energy and potential energy.
The change in the kinetic energy is found as;
[tex]\rm KE = \frac{1}{2} m(v^2-u^2)\\\\ KE = \frac{1}{2} \times 60 (9^2-6^2) \\\\ KE=1350 \ J[/tex]
Hence, the change in the kinetic energy of the runner will be 1350 J.
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Select the correct answer.
Why is the primary mirror in a telescope curved?
A.
to magnify the image
B.
to direct light rays to a focal point to intensify them
C.
to change the direction of the rays
D.
to bend the rays
E.
to absorb extra light
Answer:
to absorb extra light- E.
Answer:
E.
Explanation:
Curved mirrors absorb more light that the flat ones, this means that the image you're gonna get it has more information, you can see more.
That's why curved mirror are also used to vigilance in stores for example. Because allows you to see a more panoramic view due to the extra light reflection.
Please help I’m a big stupid idiot head
Answer:
Explanation:
ur right i think
Ur right gimme brainlyest
Caleb is swinging Rachel in a circle with a centripetal force of 533 N. If the radius of the circle is 0.75 m and Rachel has a mass of 16.4 kg, how fast is Rachel moving? Round to the nearest tenth. m/s
Velocity = √((Centrifugal force * radius)/mass)
Velocity = √(533 * 0.75 / 16.4)
Velocity = √(399.75 / 16.4)
Velocity = √24.375
Velocity = 4.9 m/s
Answer:
4.9
Explanation:
I just did it
Suppose a fly and an eagle have the same kinetic energy. How could this be true?
A fly and an eagle could have the same kinetic energy if the fly compensates its smaller mass by flying at a much higher velocity, whereas the eagle, which has a larger mass, would fly at a slower speed to achieve the same kinetic energy. This is a direct result of the kinetic energy formula and the principle of conservation of energy.
Explanation:The scenario where a fly and an eagle have the same kinetic energy is actually possible. Kinetic energy, which is the energy an object possesses due to its motion, can be calculated using the formula ½mv², where 'm' is the mass of the object and 'v' is its velocity. For the fly and the eagle to have the same kinetic energy, the fly, which has a much smaller mass compared to the eagle, must compensate by having a much higher velocity. Conversely, the eagle with a larger mass can have the same kinetic energy by flying at a lower velocity.
For example, if we consider the kinetic energy formula, a very light fly (let's say 0.002 kg) moving at a high speed (say 20 m/s) would have a kinetic energy of 0.4 Joules. In comparison, a massive eagle (for instance, 4 kg) would only need to fly at around 0.14 m/s to have the same kinetic energy of 0.4 Joules. This illustrates how mass and velocity can vary inversely for different objects to have equivalent kinetic energies.
While it might seem counterintuitive, this is a direct consequence of conservation of energy and the kinetic energy relationship. The concept that energy cannot be created or destroyed, but only transferred or transformed, means that two vastly different animals could have the same kinetic energy if their masses and velocities are complementary.