Answer:
296.01 J
Explanation:
From the question,
Q = cm(t₂-t₁)....................... Equation 1
Where Q = quantity of heat, c = specific heat capacity of aluminium, m = mass of aluminium, t₁ = Initial temperature, t₂ = Final temperature
Given: c = 897 J/kg.K, m = 0.01 kg, t₁ = 22 K, t₂ = 55 k
Substitute these values into equation 1
Q = 897×0.01×(55-22)
Q = 897×0.01×33
Q = 296.01 J
Hence 296.01 Joules of heat is required.
What distance is moved if we have a 8N force and the work done is 90J
The frequency of a sound wave is 457 Hz. What is the period?
a
0.0032 s
b 0.078 s
C 0.0010 s
d 0.0022 s
The period of the sound wave having frequency of 457Hz is 0.0022 s.
What is frequency?
The frequency refers to the number of waves that pass a fixed point in unit time.
What is the relation between frequency and time period?
Time period is equal to the reciprocal of frequency.
i.e. T = 1 / f
So, The period of the sound wave having frequency of 457Hz will be
T = 1/457
∴ T = 0.002188 s
Now , rounding to the nearest value we get , 0.0022 s
Thus , The period of the sound wave having frequency of 457Hz is 0.0022 s.
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What must happens within earth for a volcano to form
Answer:
Volcanoes on Earth form from rising magma. ... Magma also rises when these tectonic plates move toward each other. When this happens, part of Earth's crust can be forced deep into its interior. The high heat and pressure cause the crust to melt and rise as magma.
8. What is the frequency of green light waves that have a wavelength of 5.2 x 10-7 m.? The speed of light is 3.0 x 108 m/s
Answer:
[tex]f=5.76\times 10^{14}\ Hz[/tex]
Explanation:
We need to find the frequency of green light having wavelength o[tex]5.2\times 10^{-7}\ m[/tex]. It can be calculated as follows :
[tex]c=f\lambda\\\\f=\dfrac{c}{\lambda}\\\\f=\dfrac{3\times 10^8}{5.2\times 10^{-7}}\\\\f=5.76\times 10^{14}\ Hz[/tex]
So, the required frequency of green light is equal to [tex]5.76\times 10^{14}\ Hz[/tex].
True or False : 0°K=-273.15° C and 0°C (Celsius) = 273.150K
Answer:
TRUE
Explanation:
Una pelota recorre 20 m hacia la derecha y luego 10 m hacia la izquierda, todo en un lapso de tiempo de 10 s , cual es si velocidad y rapidez?
Answer:
v = 1 i ^ m / s, v = 1 m / s
Explanation:
In this problem we show the difference between vectors and scalars.
The average speed is
v = Δx / Δt
The bold are vectors
Δx = 20-10 = 10 i^ m
v = 10/10
v = 1 i ^ m / s
the unit vector indicates that the velocity is on the x-axis
The average speed is
v =Δx / Δt
v = 10/10
v = 1 m / s
in this case we have a scalar
Mars is 1.52 times as far from the Sun as Earth is. Predict the time required for Mars to orbit the Sun in Earth days.
The time required for Mars to orbit the Sun in Earth days is 1.87y.
What is Kepler's law of periods?The square of the time period of orbiting is directly proportional to the cube of the mean distance.
The ratio of mean distance, (am /ae)³ = (Tm/Te)²
Substitute the ratio of semimajor axis and time period of earth orbit Te =1 yr, we get
(1.52)³ = (Tm / 1 yr)
Tm=1.87y.
Thus, the time required for Mars to orbit the Sun in Earth days is 1.87y.
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Geologists know the past temperature of the planet based on rock and fossil evidence. Why do you think it is difficult to determine what has caused climate change in the distant past?
Answer:
I think it is difficult to determine what has caused climate change in the distant past because it must have been a long time ago so geologists can't carry out different experiments and figure out what gases the planet had conjured, so geologists can only make predictions based off the evidence they currently have from what the planet looked like before. The planet must have changed over the years, therefore the climate has also changed in the future, so they cannot work with how the planet looked in the past.
Made up of the crust and tiny bit of the mantle, this layer is divided into several constantly moving plates of what
Answer:
Explanation:
solid rock that hold the continents and oceans
list the factor that affect the speed of sound in gases
Hola!!!
what is meant by Multiverse???
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.
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anyone here??
Explanation:
group of multiple universes
these universes comprise everything that exists: the entirety of space, time, matter, energy, information, and the physical laws and constants that describe them.
what is magnetic field
Answer:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. A moving charge in a magnetic field experiences a force perpendicular to its own velocity and to the magnetic field.
Explanation:
Answer:
Explanation:
A magnetic field is a vector field that describes the magnetic influence on moving electric charges, electric currents, and magnetic materials. ... Magnetic fields surround magnetized materials, and are created by electric currents such as those used in electromagnets, and by electric fields varying in time.
What can astronomical objects that have changing magnetic fields do
ok byy make me brilliant
When a lift is accelerating downward that a=g then the net force acting on the object is: (a)F=0N (b)F=mg (c)F=w-mg (d) F=w_ma
Answer:
the answers the correct one is A
F = 0
Explanation:
To find the net force we must apply Newton's second law
F -W = ma
where the upward direction is positive, they indicate that the acceleration is equal to = - g
F = W - m g
the weight of a body of W = mg
we substitute
F = mg - mg
F = 0
The check the answers the correct one is A
Rama weighs 48 kg.she is carrying a load of 25 kg up to a height of 15 meter. what work does she do ? Also mention the type of work
Answer:
Explanation:
Total Mass: 48+25=73 kg
Height: 15m
So work = mgh= 73×9.8× 15=10731 j
And this is positive work.
n the railroad accident, a boxcar weighting 200 kN and traveling at 3 m/s on horizontal track slams into a stationary caboose weighting 400 kN. The collision connects the caboose to the car, and then both move together and you have found the final velocity. Apparently, initial kinetic energy of the system changes (in part, because of friction present). How much energy (in kJ) is transferred from kinetic energy to other forms of energy (e..g., thermal) in the collision
Answer:
ΔK = -6 10⁴ J
Explanation:
This is a crash problem, let's start by defining a system formed by the two trucks, so that the forces during the crash have been internal and the moment is preserved
initial instant. Before the crash
p₀ = m v₁ + M 0
final instant. Right after the crash
p_f = (m + M) v
p₀ = p_f
mv₁ = (m + M) v
v = [tex]\frac{m}{m+M} \ v_1[/tex]
we substitute
v = [tex]\frac{20}{20+40}[/tex] 3
v = 1.0 m / s
having the initial and final velocities, let's find the kinetic energy
K₀ = ½ m v₁² + 0
K₀ = ½ 20 10³ 3²
K₀ = 9 10⁴ J
K_f = ½ (m + M) v²
K_f = ½ (20 +40) 10³ 1²
K_f = 3 10⁴ J
the change in energy is
ΔK = K_f - K₀
ΔK = (3 - 9) 10⁴
ΔK = -6 10⁴ J
The negative sign indicates that the energy is ranked in another type of energy
Chan released a stone from a cliff of 10m height.
a)Determine the time taken for the stone to reach the bottom of the cliff.
b)Determine the velocity of the stone just before it touches the ground ignore air resistance.(g＝9.81ms-2)
Thanks
Answer:
a) time taken = 1.427 s
b) final speed before hitting the ground = 14 m/s
Explanation:
height of cliff = 10 m
acceleration due to gravity = 9.81 [tex]m/s^{2}[/tex]
time taken for stone to reach bottom of cliff = ?
velocity of stone just before hitting the ground = ?
To find the time taken, we will use Newton's equation of motion
using
[tex]v^{2} = u^{2} + 2as[/tex]
where
v = final speed of stone before hitting the ground
u = initial speed of the stone (u = 0 since the stone started falling from rest)
a = acceleration due to gravity = 9.81 [tex]m/s^{2}[/tex]
s = height of the cliff = 10 m
Solving, we have
[tex]v^{2} = 0^{2} + 2(9.81 * 10)[/tex]
[tex]v^{2} = 2*98.1[/tex]
[tex]v^{2} = 196.2[/tex]
[tex]v=\sqrt{196.2} = 14 m/s[/tex]
From the first equation of motion,
[tex]v = u + at[/tex]
where t = time taken for stone to reach bottom of cliff
imputing values, we have
[tex]14 = 0 + (9.81 * t)[/tex]
[tex]t = \frac{14}{9.81} = 1.427 s[/tex]
How is atomic energy is produced ?
Answer:
Fission and Fusion
Explanation:
There are two basic processes: fission and fusion. In both processes, mass is converted to energy according to the famous equation, e=mc2
In fission, heavy fuel (isotopes of uranium, plutonium, thorium, etc.) atoms split, releasing kinetic energy daughter particles and as radiation. In a reactor plant kinetic energy of the daughter particles is converted to thermal energy as the particles are slowed by the fuel matrix or primary coolant. Radiation is absorbed by various components of the reactor and converted to thermal energy. Thermal energy from both sources is then carried out of the reactor core by primary coolant to a turbine where it is converted to electrical energy which is then transmitted to the power grid.
In fusion, light atoms of hydrogen combine to form helium. Energy released from this reaction will be captured and used to generate electricity as well, once we have constructed a fusion reactor large enough to be self-sustaining (i.e. produce as much or more energy from fusion than needed to start the reaction going).
In the case of nuclear weapons, the tremendous energy from the nearly simultaneous fission/fusion reactions is used to create a fireball, intense radiation, and a large shock wave.
A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surface of the negatively charged plate and strikes the surface of the opposite plate, 2.0 cm away, in a time 1.5 x 10-8 s. The speed of the electron in millions m/sec as it strikes the second plate is: A. 13.3 B. 133 C. 2.67 D. 26.7 E. 534
Answer:
A. 13.3
Explanation:
First, we find the velocity of the electron in meters/sec, as follows:
[tex]v = \frac{d}{t}\\[/tex]
v = velocity of electron = ?
d = distance between plates = 2 cm = 0.02 m
t = time elapsed = 1.5 x 10⁻⁸ s
Therefore, using these values in the equation, we get:
[tex]v = \frac{0.02\ m}{1.5\ x\ 10^{-8}\ s}\\\\v = 1333333.33\ m/s[/tex]
Now, we convert this to million m/s:
[tex]v = (1333333.33\ m/s)\frac{1\ million\ m}{100000\ m}\\\\v =13.3\ million\ m/s[/tex]
Therefore, the correct answer is:
A. 13.3
What property of sound does a decibel measure
A golf club with mass 0.5 kg is swung at 23 m/s toward a stationary golf ball on a tee. The club barely slows down to 17 m/s, but the ball flies off the tee at 69 m/s. Calculate the mass of the golf ball in kg. Answer to 4 decimals. Help fast please. Will mark brainliest
Answer:
I gotchu fam. 0.0435 kg
Explanation:
m1v1+m2v2=m1v1f+m2v2f
(0.5)(23)+(m2)(0)=(0.5)(17)+(m2)(69)
11.5=8.5+69m2
3=69m2
0.0435 kg
PLEASE HELP ME
NEED IT FAST WILL GIVE B !! If correct
Answer:
25% :)
Explanation:
please help me answer!! why can't you cry in space? thanks!!
Answer:
we can't cry in space like we do earth.... because there is no gravity... due to which the tears not fall down..instead they make a liquid clump...near eyes
6. _______________ : when a certain number of waves pass a given point for a certain number of seconds? Group of answer choices A. wavelength C. amplitude D. height B. frequency
Ill give brainly-ist.
Answer:
b
kakanandnanjsnMajdnAnnznnzkkzid
Answer:
Frequency
Explanation:
I just took that test
Cynthia forgot to put the fabric softener in the wash. As her socks tumbled in the dryer, they became charged. If a small piece of lint with a charge of +1.25 E - 10 C is attracted to the socks by a force of 3.0 E - 6 N, what is the magnitude of the electric field at this location?
Answer:
E = 24000 N/C = 24 KN/C
Explanation:
The electric field experienced by a test charge is given by the following formula:
[tex]E = \frac{F}{q}\\\\[/tex]
where,
E = Electric Field = ?
F = Force of attraction = 3 x 10⁻⁶ N
q = Charge on piece of lint = 1.25 x 10⁻¹⁰ C
Therefore, using these values in the equation, we get:
[tex]E = \frac{3\ x\ 10^{-6}\ N}{1.25\ x\ ^{-10}\ C}\\\\[/tex]
E = 24000 N/C = 24 KN/C
what are the four qualities required in a healty relationship?
Answer:
Honesty. ...
Compromise. ...
Individuality. ...
Good communication. ...
Anger control. ...
Fighting fair.
Answer:
Healthy Relationships
Mutual respect. Respect means that each person values who the other is and understands the other person's boundaries.
Trust. Partners should place trust in each other and give each other the benefit of the doubt.
Honesty. ...
Compromise. ...
Individuality. ...
Good communication. ...
Anger control. ...
Fighting fair.
Does anybody know the formula needed to calculate distance given the values for mass, power, and time?
Answer:
Joules/second^2=(Newton×meter)/second^2.
Solving for mass: Kg= (second^3/ meter^2).
Which are advantages of renewable resources? Check all that apply.
Renewable energy supplies are completely reliable everywhere.
Some renewable resources will never be used up.
Little or no waste is produced by renewable resource plants.
Electricity can be generated in large quantities.
Many renewable energy facilities have lower operating costs.
Answer:
Some renewable resources will never be used up.
Little or no waste is produced by renewable resource plants.
Many renewable energy facilities have lower operating costs.
Explanation:
just did on edge
Answer:
B,C, and E are correct
Explanation:
will mark the brainiest
why is water poor conductor of heat but food conductor of electricity? pls explain
Explanation:
water contains dissolved salts which can create ions
Answer:
Water is a poor conductor of heat: Most of the heat will move in a convection current within the water at the top of the test tube, only a small fraction of it will conduct down to the ice cube.
Water doesn't need to have a large amount of impurities to act as a good conductor of electricity; even a small amount of ions can enable a source of water to conduct electric current. In a nutshell, water is able to conduct electricity due to the dissolved ions and impurities within it.
A what is a chemical secreted by your glands that regulates the activities of different body cells.
The chemical secreted by glands that regulates the activities of different body cells is HORMONE.
