Answer:
C
Explanation:
because it's new chemical substances
Astronomers have found that the level of the Sun's activity varies over the centuries. How did they come to realize that this is so:
They realized this as result of the number of sunspots getting larger and smaller over the course of the years .
What is Sunspot?This is defined as a temporary phenomena on the Sun's photosphere that appear as spots darker than the surrounding areas.
The presence of these sunspots is what gave Astronomers the idea of the Sun having varying levels of activities over the years.
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help me its just true or false
Answer:
11-false
12-false
13-false
14-false
15-false
Explanation:
11- Magnets only attract metal
12- They will repel not pull together
13- The magnet on the horseshoe is only magnetic to the hoof
14-Two opposites on a magnet will attract eachother
15-NOOO
How is the strength of an electromagnetic affected by the number of turns of wire in coil
Answer:
The magnetic field strength of an electromagnet is therefore determined by the ampere-turns of the coil with the more turns of wire in the coil the greater will be the strength of the magnetic field
Explanation:
A box with each edge of 1 m is centered on the origin. The total electric flux through one side of the box is 1 Nm2/C. What is the total charge inside the box?
Ф = E S is the total flux
Assuming the charge is at the origin-
The flux will be the same for all sides
The total area is 6 m^2
Ф = 6 * 1 N-m^2 / C = 6 N-m^2 / C
The total charge in the box is then 6 C (oulombs)
(Remember F = Newtons = E Q so E is in N/C
A charge of 4. 5 × 10-5 C is placed in an electric field with a strength of 2. 0 × 104 StartFraction N over C EndFraction. What is the electric force acting on the charge?.
The value of the electric force acting on the charge will be 0.9 N.The electric force is the product of the charge and the electric field strength.
What is electric force?
The electric force on the particle is defined as the application of the force field of one particle on another particle. It is a type of virtual force.
The given data in the problem is;
q is the charge = 4. 5 × 10⁻⁵ C
E is the electric field strength.=2.0 ×10⁴
F is the electric force=?
The electric force is given as;
[tex]\rm F = qE \\\\ \rm F = 4.5 \times 10^{-5} \times 2.0 \times 10^4 \\\\ \rm F =0.9 \ N[/tex]
Hence the value of the electric force acting on the charge will be 0.9 N.
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A skateboarder starts up a 3.0-m-long ramp at 3.2 m/s. What is the maximum height of the ramp for which the skateboarder goes off the end rather than rolling back down?
Answer:
initial KE = final PE
1/2 m v^2 = m g h
h = v^2 / (2 * g) = 3.2^2 / (2 * 9.8) = .52 m height of ramp
A hot air ballon is filled with 2,100m3 air when deflated at 25oC. When fully inflated, the average air temperature inside the balloon is 125oC. What is the final volume of the balloon
XO
also i ate a apple
The image seen in a plane mirror is located __________.
at the same distance behind the mirror
a 1200 kg car moving at 15.6 m/s collides with a stationary 1500kg car what is the velocity after the impact
Water breaks down into
hydrogen and oxygen.
Which property of matter describes a continued existing state of rest or uniform motion in a straight line?(1 point)
friction
friction
gravity
gravity
inertia
inertia
uniformity
uniformity
Answer:
inertia
Explanation:
law of inertia describe it
It is the inertia of the body which describes the existing state of rest or uniform motion in a straight line.
What is inertia?The inertia of the body is defined as If the body is at rest then it will be at the same state until an external force is not applied to it.
Similarly, If the body is in motion then it will remain in motion until and unless an external effort is not applied to stop it.
For example, if the football is placed at the rest on the ground it will never move from the same position until an external force is not applied.
Similarly, if the car is moving at a certain speed then it will only stop if the brakes are applied and if there is not any friction it will never stop.
Thus the inertia of the body describes the existing state of rest or uniform motion in a straight line.
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When you remove a battery and attach the terminals of the ohmmeter to the ends of the circuit, what is the resistance?
Answer: It is the act of measuring internal resistance.
Explanation:
It should be understood that when that action is exhibited, it is towards of measuring the internal resistance.
And it should be noted that, no matter how much or little load we attach to the battery, the voltage at the source's terminals will always stay the same.
Imagine that the light you observe from space is exhibiting a redshift. This would mean that the Universe is
csggggresddgdfgthxefecdtvh
Answer:
csggggresdd
...........
Answer:
yes :)
Explanation:
A 50W fluorescent lamp turns one quarter the electrical energy it uses into light energy. How much light energy does it give out in 12s?
Answer: A watt unit is equal to 1 joule/sec.
Explanation: So you have a lightbulb with 50% efficiency, so it turns half the energy it consumes into light energy.
5 answers
What astronomical event corresponds to the passage of 1 year?.
The astronomical event corresponds to the passage of 1 year is the Earth making one revolution about the Sun.
What is an astronomical event?"Astronomical events" refers to occurrences that astronomy examines, such as eclipses or novae, whereas astronomy events refers to meetings, conferences, and other significant astronomy-related events.
In conclusion, The earth revolves the sun in one year
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What is called the process of finding exact quantity of a substance?
Answer:
Measurement is called the process of finding exact quantity of a substances.
suppose that you have 2 boxes. one has a bottom of 0.25 m x 0.20 m and a mass of 55.5 kg. the other box has a bottom of 0.20 m x 0.40 m and a mass of 65.5 kg. find the pressure each box exerts on the ground and indicate which is the most
Answer:
Approximately [tex]1.1 \times 10^{4}\; {\rm Pa}[/tex] and [tex]8.0 \times 10^{3}\; {\rm Pa}[/tex], respectively (assuming that [tex]g = 9.81\; {\rm N \cdot kg^{-1}}[/tex].)
The [tex]55.5\; {\rm kg}[/tex] box exerts more pressure than the [tex]65.5\; {\rm kg}[/tex] box.
Explanation:
Let [tex]m[/tex] denote the mass of the [tex]55.5\; {\rm kg}[/tex] box.
The weight of that box would be: [tex]W = m\, g[/tex].
The normal force [tex]N[/tex] that this box exerts on the ground would be the same as its weight: [tex]N = W = m\, g[/tex].
If the contact area between the box and the ground is [tex]A[/tex], the pressure [tex]P[/tex] that this box exerts on the ground would be [tex]N / A[/tex]. That is:
[tex]\displaystyle P = \frac{N}{A}= \frac{m\, g}{A}[/tex].
The contact area between the ground and this [tex]55.5\; {\rm kg}[/tex] box is [tex]A = 0.25\; {\rm m} \times 0.20\; {\rm m}[/tex]. Substitute in these values and evaluate to find the pressure:
[tex]\begin{aligned} P &= \frac{N}{A} \\ &= \frac{m\, g}{A} \\ &= \frac{55.5\; {\rm kg} \times 9.81\; {\rm N \cdot kg^{-1}}}{0.25\; {\rm m} \times 0.20\; {\rm m}} \\ & \approx 1.1 \times 10^{4}\; {\rm Pa}\end{aligned}[/tex].
Similarly, for the [tex]65.5\; {\rm kg}[/tex] box:
[tex]\begin{aligned} P &= \frac{N}{A} \\ &= \frac{m\, g}{A} \\ &= \frac{65.5\; {\rm kg} \times 9.81\; {\rm N \cdot kg^{-1}}}{0.20\; {\rm m} \times 0.40\; {\rm m}} \\ & \approx 8.0 \times 10^{3}\; {\rm Pa}\end{aligned}[/tex].
Thus, the [tex]55.5\; {\rm kg}[/tex] box exerts greater pressure on the ground than the [tex]65.5\; {\rm kg}[/tex] box.
A piece of warm concrete is placed in a cold-water tank, and energy flows between the concrete and the water. Which way does the energy flow in this system?
Answer:
Heat flows from hot to cold objects. When a hot and a cold body are in thermal contact, they exchange heat energy until they reach thermal equilibrium, with the hot body cooling down and the cold body warming up. This is a natural phenomenon we experience all the time.
Explanation:
The average speed of an object which moves 10 km in 30 minutes is
Explanation:
An object which moves 10 km in 30 minutes .
we have to find the average speed of the object .
Changing unit of time into hour
Time = 30/60 hour
Time = 1/2 hour
Time = 0.5 hour
Now let's calculate the average speed
[tex] \rm\bf \: Average \: speed \: = \frac{Total \: distance}{Total \: time \: } [/tex]
Put the value we get
[tex] \dashrightarrow \sf \: Average \: speed \: = \frac{10}{0.5} \\ \\ \dashrightarrow \sf \: Average \: speed \: = \frac{100}{5} \\ \\ \dashrightarrow \sf \: Average \: speed \: = \cancel \frac{100}{5} \\ \\ \dashrightarrow \sf \: Average \: speed \: =20km {hr}^{ - 1} [/tex]
So, the average speed is 20km/hr
Heat always transfers from substances with _____ thermal energy to substances with _______ thermal until both substances reach the ____ temperature. Fill in the blanks.
Heat always transfers from substances with high thermal energy to substances with low thermal until both substances reach the maximum temperature
Light is sometimes described as a wave and sometimes as a particle. Give evidence to support the wave nature of light.
Answer:
there are some ups and downs in life and particle is describing it as a result of happiness
What cause-and-effect relationship is described in this
article?
A. Developers no longer leave in accidental Easter eggs
because of improved quality control.
B. Developers have to sneak in Easter eggs because
companies frown upon the practice.
C. Gamers were enthusiastic about Easter eggs, so game
developers started adding more.
D. Gamers get frustrateda hunting for Easter eggs, so.
companies publish the codes or cheats.
Lmk
The term cause and effect relationship relates to a situation where an effect is directly traceable to a cause.
What is cause and effect relationship?The term cause and effect relationship relates to a situation where an effect is directly traceable to a cause. The question is incomplete and the article was not mentioned.
A typical example of cause and effect relationship is that increased fossil fuel use is leading to a rise in the average temperature of the planet.
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What is the objects acceleration
How are Fahrenheit temperatures converted to Celsius temperature
Suppose we pass light through two narrow slits. What would we see on a distant screen after passing the light through both slits?.
If we pass light through two narrow slits. then a double-slit interference pattern will form.
What is a Double-slit interference pattern?When light is passed through two narrow slits, an interference pattern will be formed on a distant screen. This is known as the double-slit interference pattern.
The interference pattern is formed because the light passing through each slit interferes with the light passing through the other slit. The light waves can either reinforce or cancel each other out, depending on the phase relationship between them.
On the screen, there will be alternating bright and dark fringes, with the brightest fringes corresponding to constructive interference, where the waves are in phase, and the darkest fringes corresponding to destructive interference, where the waves are out of phase.
The pattern will have a series of bright bands, called interference maxima, where the bright fringes occur, separated by dark bands, called interference minima, where the dark fringes occur. The position of the maxima and minima will depend on the wavelength of the light, the distance between the slits, and the distance between the slits and the screen.
This interference pattern is a classic example of the wave nature of light, and it played an important role in the development of quantum mechanics.
Hence, when we pass the light through two narrow slits a double-split interference is formed.
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(10 POINTS) I need help on a physics question please short on time
Answer:
b
Explanation:
because it has the biggest number
When an electron enters a region of uniform magnetic field (B=0.19T), with its
velocity (V=5.5X10^6m/s) perpendicular to the field, it experiences a magnetic
force which acts as centripetal force to cause circular motion of the particle. find
the radius of the track?
The radius of the track in the circular motion is 0.164 mm.
Magnetic force of the of chargeThe magnetic force of the charge is calculated as follows;
F = qvB
Centripetal force of the chargeThe centripetal force experienced by the charge is calculated as follows;
[tex]F = \frac{mv^2}{r}[/tex]
The magnetic force is equal to the centripetal force[tex]qvB = \frac{mv^2}{r} \\\\qB = \frac{mv}{r} \\\\r = \frac{mv}{qB} \\\\[/tex]
The radius of the trackThe radius of the track is calculated as follows;
[tex]r = \frac{9.1 \times 10^{-31} \times 5.5 \times 10^6}{1.6 \times 10^{-19} \times 0.19} \\\\r = 1.64 \times 10^{-4} \ m\\\\r = 0.164 \times 10^{-3} \ m\\\\r = 0.164 \ mm[/tex]
Thus, the radius of the track in the circular motion is 0.164 mm.
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A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.
The potential across the capacitor at t = 1.0 seconds, 5.0 seconds, 20.0 seconds respectively is mathematically given as
t=0.476vt=1.967vV2=4.323vWhat is the potential across the capacitor?Question Parameters:
A 1. 0 μf capacitor is being charged by a 9. 0 v battery through a 10 mω resistor.
at
t = 1.0 seconds5.0 seconds20.0 seconds.Generally, the equation for the Voltage is mathematically given as
v(t)=Vmax=(i-e^{-t/t})
Therefore
For t=1
V=5(i-e^{-1/10})
t=0.476v
For t=5s
V2=5(i-e^{-5/10})
t=1.967
For t=20s
V2=5(i-e^{-20/10})
V2=4.323v
Therefore, the values of voltages at the various times are
t=0.476vt=1.967vV2=4.323vRead more about Voltage
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Complete Question
A 1.0 μF capacitor is being charged by a 5.0 V battery through a 10 MΩ resistor.
Determine the potential across the capacitor when t = 1.0 seconds, 5.0 seconds, 20.0 seconds.
When two objects are in direct physical contact, heat is always conducted from the ________ object to the _______ object.
Answer:
1st blank: warmer 2nd blank: cooler
Explanation:
Heat energy always flows from the warmer object to the cooler object.
