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.
Which type of force should she place in the cell marked x
Answer:
Gravity
Explanation:
For a space station in orbit, the centripetal force is the force of gravity.
For a child in a swing, the centripetal force is the normal force.
For a ball on a string, the centripetal force is the tension.
Answer:
Gravity
Explanation:
Gravity is one of four fundamental forces in nature. The other fundamental quantities are the electromagnetic interaction force, the weak force and the strong force. Simply put, gravity is the magnitude responsible for defining the weight of a body, being the centripetal force of orbiting objects (such as a space station, for example) and being the vertical and downward force that holds us together with the planet. Any object that moves in free fall is under the influence of gravity acceleration, which on Earth equals approximately 9.8 m / s2.
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
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:
Why does the earth rotate?
A. Because Earth is formed from cold gases collapsing due to gravity
B. Because the matter in the nebula that formed Earth was spinning
C. Because Earth forms more than 99% of the mass of the solar system
D. Because the hydrogen atoms inside the nebula fused to form helium
Answer:
the answer I think is A im so sorry if its wrong
Explanation:
Because yes we do have gases collapsing we also have dust collapsing with it and surrounding it to make a disk type of air flow that pushes it that makes it rotate if that makes sense. yet again super sorry if its wrong.
Answer:
the answer is actually B
Explanation:
When our solar system formed out of a gas cloud, called a nebula, there was lots of dust and gas coming together due to the force of gravity. The dust and gas was already moving around in a circle. As it all clumped together to form the Sun and planets, these new objects started to spin – and then spin faster.
i hope this helps!!!
Hansel pushes a 2 lb. box 5 feet in 20 seconds. How much work has he done?
Answer:
10
Explanation:
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.
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)
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.
conclusion on ohm's law experiment
Answer:
Explanation:
In our previous articles, we observed the theoretical formulas of Ohm’s law, its calculations in the lab report, and experiment. Today you’ll learn the verification of theory vs experimental results on a 1 kΩ resistor.
The theoretical results are obtained from the formula of Ohm’s law: V = IR. The experimental verification is provided for a metal film 1 kΩ (±0.05%). We have used a high-quality resistor with negligible tolerance value so as to reduce the tolerance error.
The little problem in our calculations arises due to improper handling of multimeter probes. You can learn the complete method to perform the Ohm’s experiment here and can calculate the current values by using the Ohm’s law calculator.
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
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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How would a geologist identify where an igneous rock was formed? A. If it has coarse grains, then it cooled slowly on the surface of the earth. If it has fine grains, then it cooled rapidly beneath the earth's surface. B. If it has coarse grains, then it cooled rapidly on the surface of the earth. If it has fine grains, then it cooled slowly beneath the earth's surface. C. If it has coarse grains, then it cooled rapidly beneath the surface of the earth. If it has fine grains, then it cooled slowly on the earth's surface. D. If it has coarse grains, then it cooled slowly beneath the surface of the earth. If it has fine grains, then it cooled rapidly on the earth's surface.
Answer:
D. If it has coarse grains, then it cooled slowly beneath the surface of the Earth. If it has fine grains, then it cooled rapidly on the Earth's surface.
Explanation:
The easiest way for a geologist to identify where the igneous rocks have formed is to look at their grains. There's two types of igneous rocks, intrusive and extrusive. The intrusive igneous rocks have formed from the magma that has cooled off slowly deeper into the crust, thus their crystals had more time to grown, and they have coarse grains. The extrusive igneous rocks have formed from the lava that has cooled off quickly on the surface, thus their crystals had very little time to grow, so they have fine grains.
The correct option is D. If it has coarse grains, then it cooled slowly beneath the surface of the earth. If it has fine grains, then it cooled rapidly on the earth's surface.
To understand why option D is correct, let's consider the processes of igneous rock formation and the factors that influence grain size:
1. Intrusive (plutonic) rocks are formed from magma that cools and solidifies within the Earth's crust. This slow cooling process allows for the formation of large crystals, resulting in coarse-grained rocks. Since the cooling is slow, the mineral ions have more time to move and form larger crystals. Examples of intrusive rocks include granite and gabbro.
2. Extrusive (volcanic) rocks are formed from lava that cools and solidifies on the Earth's surface. This rapid cooling process does not allow much time for crystal growth, resulting in fine-grained or aphanitic rocks. The rapid cooling rate traps the mineral ions before they can organize into larger crystals, leading to a rock with small, barely visible crystals. Examples of extrusive rocks include basalt and rhyolite.
Therefore, the identification of the environment in which an igneous rock was formed is based on the texture of the rock, which is indicative of the cooling rate:
- Coarse grains (phaneritic texture): The rock cooled slowly, which typically occurs beneath the Earth's surface where the surrounding rock acts as an insulator, slowing down the cooling process. This is characteristic of intrusive rocks.
- Fine grains (aphanitic texture): The rock cooled rapidly, which typically occurs on the Earth's surface where the lava is exposed to the atmosphere or water, leading to quick heat loss. This is characteristic of extrusive rocks.
Based on this understanding, the correct identification is:
- If an igneous rock has coarse grains, it cooled slowly beneath the surface of the earth (intrusive).
- If an igneous rock has fine grains, it cooled rapidly on the earth's surface (extrusive).
Hence, option D is the correct answer.
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]
Please help I’m a big stupid idiot head
Answer:
Explanation:
ur right i think
Ur right gimme brainlyest
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]
A 5 kg rock is 8 m above the ground,Calculate it's energy?
Answer:
392 J
Explanation:
Gravitational potential energy is:
PE = mgh
where m is mass, g is acceleration of gravity, and h is the height.
PE = (5 kg) (9.8 m/s²) (8 m)
PE = 392 J
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.
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.
a filament lamp of resistance 3 ohms is connected to the terminals of a 6 V battery. when the switch is closed, the current in the circuit is
voltage = current * resistance
so
current = voltage/resistance
therefore,
current = 6/3 A = 2 A
Answer:
tratamento de lei ohm
Explanation:
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.
This direct relationship graph shows that the position of the car as time elapses.
When there is direct relationship the car moves with respect to time.
Effect of direct relationshipThe direct relationship in the graph shows that the position of the car positively changes as time elapses because there is a direct relationship between position and time.
Direct relationship means when one factor increases the other also increases whereas one decreases the other also decreases so we can conclude that when there is direct relationship the car moves with respect to time.
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Answer: Increases
This direct relationship graph shows that the position of the car
increases as time elapses.
Explanation: got 100 percent on edge
If a battery in a circuit is 24 volts and the resistance is 12 ohms what is the current
I = 2A.
The easiest way to solve this problem is using Ohm's Law equation I = V/R.
The battery in the circuit is V = 24V and the resistance R = 12Ω, to calculate the current we use the equation above:
I = 24V/12Ω = 2A
Using Ohm's law, which states that current equals voltage divided by resistance, the current in a circuit with a 24-volt battery and a 12-ohm resistance is found to be 2 amperes.
Explanation:To calculate the current in a circuit with a given voltage and resistance, we can apply Ohm's law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, we are given a 24-volt battery and a resistance of 12 ohms.To calculate the current in a circuit with a given voltage and resistance, we can apply Ohm's law, which states that current (I) equals voltage (V) divided by resistance (R). In this case, we are given a 24-volt battery and a resistance of 12 ohms. Using Ohm's law:
I = V / R
I = 24 V / 12 Ω
I = 2 A
Therefore, the current flowing through the circuit is 2 amperes (A).
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A 2000 kg car is pulling a 1000 kg trailer. The car's engine exerts 6000 N of force to move the car and the trailer. In addition, the car and the trailer experience a 1000 N frictional force as they are being pulled. What is the magnitude of the net force on this system ?
a. 2000 N
b. 4000 N
c. 5000 N
d. 8000 N
The magnitude of the net force on the car and trailer system is 5000 N.
Explanation:The magnitude of the net force on the car and trailer system can be calculated by subtracting the frictional force from the force exerted by the car's engine. In this case, the engine exerts a force of 6000 N and the frictional force is 1000 N. Therefore, the net force is 6000 N - 1000 N = 5000 N. So, the correct answer is c. 5000 N.
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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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What is the difference between chemical change and a physical change?
Answer:
Explanation:
There are several differences between a physical and chemical change in matter or substances. A physical change in a substance doesn't change what the substance is. In a chemical change where there is a chemical reaction, a new substance is formed and energy is either given off or absorbed.
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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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.
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
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