[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here's the answer ~
1. The energy that has been given to the solid material is being used to change its phase from solid to liquid.
2. This all energy is converted into latent heat of fusion causing change in state. so there's no increase in temperature.
Answer →
a) The phase of solid material is changing due to Absorption of heat.
b) The energy that is being supplied to it is absorbed by the material to break the intermolecular bonds.
Explanation:
Heat is a mod of transfer of energy, and solid is a giant network of atom or ions closely bounded with high inter molecular forces. When the bonds are formed lead to release in energy hence to break the bond you need to supply energy and that energy supplier is heat. Generally there are two types of heat, one that you sense as rising temperature and another where you see a gradually change in the phase of material. When the heat that you supply is being absorbed that means the energy is being consumed(absorbed) by the material, to break the bonds, and you doesn't sense the temperature of material being raised but the change in state of material from solid→Liquid, solid→gas depends on the type compound, the phase of material changes, same thing happens in reverse case from Gas→Liquid, Liquid→Solid, the energy is released in atmosphere. this absorbed or released energy(heat) is Latent heat.
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Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars _________ far from the center of the galaxy.
Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars is constant far from the center of the galaxy.
What is the speed of orbiting stars from center of the galaxy?The speed of stars is in the range of 1 kpc to 16 kpc from the galactic centre.
These stars move approximately on circular orbits about the galactic centre along with small peculiar velocities.
For most of the stars, the velocities range between 200 km/s to 250 km/s.
The speed of the stars orbiting stars remains constant far from the center of the galaxy.
Thus, Astronomers know that dark matter is present in galactic halos because the speeds of orbiting stars is constant far from the center of the galaxy.
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When charging a secondary cell, energy is stored within a dielectric material using an electric field. True or False
It is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"
What is a secondary cell?The term secondary cell refers to a cell that can be recharged when it is used up. A typical example of a secondary cell is a lithium ion battery.
We know that most of the secondary cell are charged using a chemical that is inside the battery. As such, it is a false statement that; "when charging a secondary cell, energy is stored within a dielectric material using an electric field"
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How many galaxies similar in size to the milky way would you expect to find, on average, in cubes of that same size? in order to simplify the problem, assume that the total number of galaxies of each type has not changed between then and now.
The number of galaxies similar in size to the milky way that one can expect to find in cubes of that same size will be 64.
What is a milky way?It should be noted that milky way simply means a spiral galaxy shaped that contains stars.
Here, the number of galaxies similar in size to the milky way that one can expect to find in cubes of that same size will be 64.
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You push a box 10.0m with a force of 45 N. How much work do you do?
Answer:
450m because you multiply the force to the distance to get how much work you've done.
Describe the motion of the object in the graph below. *
(A) The object is at rest
(B) The object is accelerating
(C) The object is moving at a constant speed
the object moving at constant velocity so the answer is c
If the battery has 1000 joules stored in it, how long will the light be illuminated, assuming the voltage is constant
Answer:
20 mins
Explanation:
Use the drop-down menu to answer the question. which sound wave-object interaction is used by animals in echolocation?
Answer:
Reflection
Explanation:
A bullet with a mass of 4.26 g and a speed of 881 m/s penetrates a tree horizontally to a depth of 4.44 cm. Assume that a constant frictional force stops the bullet. Calculate the magnitude of this frictional force. Try energy considerations.
Let F be the magnitude of the frictional force. This force performs an amount of work W on the bullet such that
W = -Fx
where x is the distance over which F is acting. This is the only force acting on the bullet as it penetrates the tree. The work-energy theorem says the total work performed on a body is equal to the change in that body's kinetic energy, so we have
W = ∆K
-Fx = 0 - 1/2 mv²
where m is the body's mass and v is its speed.
Solve for F and plug in the given information:
F = mv²/(2x)
F = (0.00426 kg) (881 m/s)² / (2 (0.0444 m))
F = 37,234.8 N ≈ 37.2 kN
A beam of light bends when it passes from air into water, and then bends even more when it passes from water into glass. What can you conclude from this fact?.
Answer:
Certain Things Make Light Bend?
Explanation:
Transparent Objects/ things can make light bend when entering through it.
guys please help me i need to get this done
my teacher wants me to find the total distance and the displacement please give explanation also ty
describe an experimental procedure the student could use to collect the data needed to find the frictional torque exerted on the platform while it rotates
A frictional torque is exerted on a platform while it rotates because the force is along it's axis and changes only the magnitude and not the direction of the angular velocity.
What is frictional torque?A frictional torque is a rotational force that is caused by the movement of two objects that are in contact.
To collect data needed to find the frictional torque exerted on the platform while it rotates the experimental procedure the student should use include the following:
A disc shaped platform with know inertiaThe platform should be mounted on a fixed axle.The platform should also be rotating on a horizontal plane.The quantities that should be measured is that rotational frictional force and angular velocity.
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What area of research did brahe assign to kepler, which led to the development of his laws of planetary motion? the universal law of attraction the universal law of gravitation the retrograde motion of the sun the retrograde motion of mars
The area of reaserch in which Kepler worked is the area of the retrograde motion of the sun.
Who is Kepler?Kepler is most known for his popular laws that deal with the idea of planatary motion. There are three laws of planetary motion as described by Kepler.
Hence, the area of reaserch in which Kepler worked is the area of the retrograde motion of the sun.
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Answer:
its actually D.the retrograde motion of mars
the resistance of a fixed coil measures 55 ohms at 25 degrees Celsius and 65 ohms at 75 degrees Celsius find the temperature coefficient of the conductor at zero degree celsius
Answer:
To change degrees Celsius in degrees Fahrenheit, the formula is:
F = 1.8C +32F=1.8C+32
So,C = 1.8C +32C=1.8C+32
C = -40C=−40
T=-40+273.15=233.15\ KT=−40+273.15=233.15 K
0.09/^oC
How many galaxies similar in size to the milky way would you expect to find, on average, in cubes of that same size? in order to simplify the problem, assume that the total number of galaxies of each type has not changed between then and now.
We would discover 64 galaxies the size of the Milky Way in a cube that now holds one galaxy the size of the Milky Way.
What is a galaxy?A galaxy is a massive clump of gas, dust, and billions of stars and their solar systems bound together by gravity.
The first galaxies were discovered in the 17th century by Charles Messier, who had no idea what they were at the time.
Messier, a proficient comet viewer, noticed many more fuzzy objects in the sky that he knew were not comets.
We would discover 64 galaxies the size of the Milky Way in a cube that now holds one galaxy the size of the Milky Way.
Hence there are 64 galaxies similar in size to the milky way.
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if you looked at the frequency spectrums of two friends saying the word dog, would they look the same or different?
Answer:
different
Explanation:
everybody have there own way of saying it.
What distinguishes asteroids from other solar system objects is that they always have irregular, "potato-like" shapes.
True
False
What distinguishes asteroids from other solar system objects is that they always have irregular, "potato-like" shapes, it's a true statment.
What are asteroids?Asteroids are rocky, metallic objects that orbit the Sun, but too small to be considered planets. They are known as secondary planets. Asteroids range in size: from Ceres, which has a diameter of about 1000 km, to the size of boulders.
In this case, For very small asteroids, it is not difficult to accept that they are irregularly shaped either because they have not grown enough, or because they are pieces of larger bodies that collided.
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This image to the left is a simple circuit. What part of the circuit is considered the “source”?
a. the battery
b. the wire
c. one of the lightbulbs
d. the switch
Answer:
The battery it consider as one of the circuits elements.
A solenoid 86.0 cm long has a radius of 2.40 cm and a winding of 1000 turns; it carries a current of 3.60 A. Calculate the magnitude of the magnetic field inside the solenoid.
Hello!
We can use the following equation:
[tex]B = \mu_0 ni[/tex]
B = Magnetic field strength (T)
μ₀ = Permeability of free space (Tm/A)
n = # of loops per unit length
We are given the total number of loops (N), so divide by length:
[tex]n = \frac{N}{l} = \frac{1000}{.86} = 1162.79[/tex]
Now, plug this value into the equation for the magnetic field strength:
[tex]B = (4\pi \times 10^{-7})(1162.79)(3.6) = \boxed{0.00526 T}[/tex]
How can larger telescopes
give astronomers a more precise picture of the distances to the nearest stars?
Answer:
Explanation:
"Larger telescopes" generally means larger apertures. This is the part of the telescope which collects the light. The more light collected, the more clear the picture becomes
What would most likely happen if the decomposers were removed from the food web?
A.There would be more energy to pass around.
B.The consumers would have more food to eat.
C.There would be less competition for animals that rely on plants for food.
D.The decaying matter would not be returned back into the environment.
How do you calculate distance traveled from a speed/time acceleration graph?
Answer:
by multiplying speed with time
Explanation:
Is the moment of inertia of a body is unique? Give reason to your answer.
Answer:
The moment of inertia about a "fixed" axis is unique.
The moment of inertia of a square is different for an axis that passes perpendicular to the center of the square as opposed to an axis that lies in the plane of the square.
Torque = I * alpha shows that angular acceleration depends on I but not on the angle thru which I rotates α = ω / t
How does nuclear fusion affect the life cycle of a star?.
Answer:
As the main sequence star glows, hydrogen in its core is converted into helium by nuclear fusion. When the hydrogen supply in the core begins to run out, and the star is no longer generating heat by nuclear fusion, the core becomes unstable and contracts
Explanation:
Which event in a solar cell uses the photoelectric effect?
Answer:
Light shone on metal expulses electrons from its surface. This phenomenon is the photoelectric effect, and the electrons are called photoelectrons. Experiments indicate that by increasing light frequency, the kinetic energy of the photoelectrons increases, and by intensifying the light, the current increases
Which of the
following
denotes the
wavelength of
the wave on
the image?
A. A and C
B. Band E
C. F only
D. D and G
A charge of 8.4 × 10–4 C moves at an angle of 35° to a magnetic field that has a field strength of 6.7 × 10–3 T.
If the magnetic force is 3.5 × 10–2 N, how fast is the charge moving?
9.1 × 10–5 m/s
1.3 × 10–4 m/s
7.6 × 103 m/s
1.1 × 104 m/s
Answer:
the correct answer is D
Explanation:
When looking through her father's medical supplies, Isabella is surprised to see a funny looking flashlight. She turns it on and it seems to glow
purple. She asks her father what it is for, and he tells her that he uses the light to perform Wood's Lamp Tests. He tells Isabella that it is not ofte
that he uses the light but only if he suspects a certain zoonotic disease. Which disease would cause Isabella's dad to get out his black light?
A ringworm
B. plague
Chantavirus
D.
anthra
Reset
Next
G
Plague disease would cause Isabella's dad to get out his black light. Option B is correct.
What is zoonotic disease?A zoonotic is an infectious illness that is spread from animals to humans.
Plague, defined as the infectious illness. Fever, weakness, and headache are some symptoms.
This often occurs one to seven days following exposure. There are three types of plague, each of which affects a different bodily area and causes various symptoms.
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Which of the following objects would probably become hottest if left in the sun for several hours?
a piece of white paper
a piece of black plastic
a sheet of aluminum foil
a block of light-coloured wood
15. A ruby-throated hummingbird beats its wings at a rate of about 70 wing beats per
second.
What is the frequency in Hertz of the sound wave?
b. Assuming the sound wave moves with a velocity of 350 m/s, what is the
wavelength of the wave?
U
E
Answer:
a
Explanation:
The power produced by an electric motor is 400w.how long will it take the motor to do 10,000 j of work
Answer:
Energy = Power × Time
We make Time the subject in this equation
Time = Energy ÷ Power
Time = 10000 ÷ 400
Time = 25seconds