Answer:
The density of the 1,000,000 kg iceberg = The density of the 10 g iceberg
Explanation:
The given quantities of iceberg that will be the basis of the comparison of the densities of the iceberg;
The mass of the iceberg = 1,000,000 kg
The mass of the ice cube taken from the iceberg = 10 g
The density of a substance, is the measure of the mass of the substance per volume of the substance, it is a constant for the substance
[tex]Density = \dfrac{Mass}{Volume}[/tex]
For the iceberg, the density of the iceberg is the property that indicates the volume occupied by a given mass of the iceberg
Because of density, we can estimate that the volume occupied by a 1,000 kg iceberg is 10 times the volume occupied by a 100 kg iceberg
We can write
The density of the 100 kg iceberg = 100 kg/(x m³)
The density of the 1,000 kg iceberg = 1,000 kg/(10 × x m³) = 100 kg/(x m³)
Therefore, the density of the 100 kg iceberg = The density of the 1,000 kg iceberg
Similarly,
The density of the 1,000,000 kg iceberg = The density of the 10 g iceberg because the 10 g iceberg was obtained from the 1,000,000 kg iceberg, and therefore, they have the same density.
What’s an insulator?
A.Material does not conduct electrical current
B.Material that conducts electrical current
C.Other
Answer: a substance which does not readily allow the passage of heat or sound. so I think A or C but I pick A
Explanation:
An object's inertia is its tendency to maintain contact:
1.) Mass.
2.) Position.
3.) Acceleration.
4.) Velocity.
hello! it is velocity.
i say this because, Inertia is the tendency of an object to resist changes in its state of motion. ... The state of motion of an object is defined by its velocity - the speed with a direction.
How much force is required to stretch a spring 12 cm, if the spring constant is 55 N/m?
Answer:
Explanation:
F = -kΔx
Since the spring constant is given in N/m, we need to convert the stretch to meters as well.
12 cm = .12 m
Now we can solve the problem:]
F = -55(-.12) so
F = 6.6N
The force required to stretch the spring is 6.6 N
Data obtained from the question Extention (e) = 12 cm = 12 / 100 = 0.12 mSpring constant (K) = 55 N/mForce (F) =? How to determine the forceThe force acting on a spring is given by:
Force (F) = spring constant (K) × Extention (e)
F = Ke
With the above formula, we can obtain the force required to stretch the spring as follow:
F = Ke
F = 55 × 0.12
F = 6.6 N
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find the torque when the work done to more through an angel of 1/4π radians is 3j
Answer:
The torque is approximately 3.82 N·m
Explanation:
The relationship between work done, 'W', and the applied torque, 'τ' can be presented as follows;
W = τ × Δθ
Where;
W = The work done by the torque
τ = The magnitude of the torque
Δθ = The angle through which the object is turned
The parameters for 'W' and 'Δθ' are;
W = 3j
Δθ = 1/4 × π
From W = τ × Δθ, we have;
τ = W/Δθ
∴ τ = 3j/(1/4 × π) ≈ 3.81971863421 N·m
The torque, τ ≈ 3.82 N·m
If it is known that a motor battery has an input voltage of 12V and a capacity of 6 Ah, how much power and resistor value is required to turn on 8 lamps with a parallel circuit, with the specifications of each lamp having a maximum voltage of 3V and an electric current of 140 mA? How long did all the lights go on until they off?
Answer:
Part A
The power to turn on the lamp, ∑P = 3.36 W
Part B
The Resistor required is approximately 8.04 Ohms
Part C
The time for all the lights to go out is approximately 21.43 hours
Explanation:
The input voltage of the motor battery , V = 12 V
The capacity of the battery, Q = 6 Ah
The number of lamps in parallel = 8 lamps
The maximum voltage of each lamp, = 3 V
The electric current in each lamp = 140 mA
The energy available in a battery, E = Q × V
For the battery, we have;
E = 6 Ah × 12 V = 72 Wh
The energy available in a battery, E = 72 Wh
Part A
The power used by the lamps, [tex]P_i[/tex] = [tex]I_i[/tex] × [tex]V_i[/tex]
∴ The total power used by the lamp, ∑P = 8 × 0.14 A × 3 V = 3.36 W
The power to turn on the lamp, ∑P = 3.36 W
Part B
The resistance required, is given as follows;
Resistor required = (Battery voltage - Lamp voltage)/(The sum of bulb current)
∴ Resistor required = (12 V - 3 V)/(8 × 0.14 A)
The Resistor required = 8.03571429 Ohms
The Resistor required ≈ 8.04 Ohms
Part C
The time for all the lights to go out = The time for the lamps to use all the power available in the battery
The time for all the lights to go out, t = E/∑P
∴ t = 72 Wh/(3.36 W) = 21.4285714 h
∴ The time for all the lights to go out, t ≈ 21.43 h
The time for all the lights to go out = The time for the lamps to use all the power available in the battery = t ≈ 21.43 h
∴ The time for all the lights to go out ≈ 21.43 hours.
A 13 500 N car traveling at 50.0 km/h rounds a curve of radius 2.00 × 102 m. Find the following: a. the centripetal acceleration of the car b. the centripetal force c. the minimum coefficient of static friction between the tires and the road that will allow the car to round the curve safely
Answer:
a. 0.947 m/s^2
b. 1304.54 N
c. 0.0966
Explanation:
mass of car = 13500 N = 13500/9.8 = 1377.55 kg
velocity = 50 km/h = 50,000 m/h = 13.9 m/s
raidus = 204 m
a. centripetal acceleartion = v^2/r = 13.9^2/204 = 0.947 m/s^2
b. centripetal force = m*centripetal acceleration = 1377.55 * 0.947 = 1304.54 N
c. In order for the car to round the curve safely, static friction = centripetal force
static friction = coefficient of friction (mu) * mg = mu* 1377.55*9.8 = 13500mu
13500mu = 1304.54
mu = 1304.54/13500 = 0.0966
The acceleration, force and coefficient of friction is required.
Centripetal acceleration is [tex]0.965\ \text{m/s}^2[/tex]
Centripetal force is [tex]1328\ \text{N}[/tex]
Coefficient of friction is [tex]0.1[/tex]
N = Weight of car = 13500 N
v = Velocity = [tex]50=\dfrac{50}{3.6}=13.89\ \text{m/s}[/tex]
r = Radius = [tex]2\times 10^2\ \text{m}[/tex]
m = Mass of car = [tex]\dfrac{N}{g}[/tex]
g = Acceleration due to gravity = [tex]9.81\ \text{m/s}^2[/tex]
Centripetal acceleration is
[tex]a_c=\dfrac{v^2}{r}\\\Rightarrow a_c=\dfrac{13.89^2}{2\times 10^2}\\\Rightarrow a_c=0.965\ \text{m/s}^2[/tex]
Force is given by
[tex]F_c=ma_c\\\Rightarrow F_c=\dfrac{N}{g}a_c\\\Rightarrow F_c=\dfrac{13500}{9.81}\times 0.965\\\Rightarrow F_c=1328\ \text{N}[/tex]
Coefficient of friction is given by
[tex]\mu=\dfrac{F_c}{N}\\\Rightarrow \mu=\dfrac{1328}{13500}\\\Rightarrow \mu=0.098\approx 0.1[/tex]
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'If you increase the frequency of a sound wave four times, what will happen to its speed?
ОА.
The speed will increase four times.
OB.
The speed will decrease four times.
O c.
The speed will remain the same.
OD
The speed will increase twice.
O E.
The speed will decrease twice.
What happens when an object is moved against gravity, such as rolling a toy car up a
ramp?
a. Potential energy does not change
b. Potential energy decreases as it is transformed into kinetic energy
c. Kinetic energy does not change
d. Kinetic energy is transformed into potential energy
Answer:
gravitational force remain constant
we have that from the Question, it can be said that
What happens when an object is moved against gravity, such as rolling a toy car up is
Kinetic energy is transformed into potential energyOpion DFrom the Question we are told
What happens when an object is moved against gravity, such as rolling a toy car up
a. Potential energy does not change
b. Potential energy decreases as it is transformed into kinetic energy
c. Kinetic energy does not change
d. Kinetic energy is transformed into potential energy
Generally the equation for Kinetic energy is mathematically given as
K.E=1/2mv^2
Generally the equation for Potential energy is mathematically given as
P.E=mgh
Therefore
With increase in height of the car Kinetic energy is transformed into potential energy as g remains constant
Hence
What happens when an object is moved against gravity, such as rolling a toy car up is
Kinetic energy is transformed into potential energyOpion DFor more information on this visit
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1. What is the role of the battery in an electric circuit? a. Transformer b. Conductor c. Source d. switch
Answer:
Conductor
Explanation:
A battery holds all of the energy in itself. So without the battery, the circuit cannot work.
Hope this helped, and please mark as Brainliest <3
Which human activity causes the most erosion?
А
building a bridge over a river
B
cutting down trees for lumber
С
building a dam in a stream
D
planting crops in a field
Answer:
B
Explanation:
1. meaning of heat and temperature
2. differences between heat and temperature
Answer:
1.heat is a form of 1.temperature is a form
energy that gives of energy that is used to
sensation of measure hotness or
warmth. or coldness of body.
2.its si unit is 2.its si unit is kelvin.
joule.
Which food provide the best nutrients
Answer: Foods that naturally are nutrient-rich include fruits and vegetables. Lean meats, fish, whole grains, dairy, legumes, nuts, and seeds also are high in nutrients.
use atoms and molecules in a sentence
Answer:
An atom is the smallest part of an element by itself, while molecules are built of multiple atoms.
Light is incident perpendicularly from air onto a liquid film that is on a glass plate. The liquid film is 70.2 nm thick, and the liquid has index of refraction 1.50. The glass has index of refraction 1.40. Calculate the longest visible wavelength (as measured in air) of the light for which there will be totally constructive interference between the rays reflected from the top and bottom surfaces of the film. Assume that the visible spectrum lies between 400 nm and 700 nm.
Answer:
λ₀ = 421.2 10⁻⁹ m
Explanation:
This is an exercise in constructive interference by reflection, let's review some concepts:
* When a ray goes from a medium with a lower index to one with a higher index, it undergoes a phase change of 180º, in this case we have a phase change from the air to the film
* Within the material the wavelength changes according to the spare part index of the material
λₙ = λ₀ / n
By including these two aspects, the constructive interference equation remains
2 n t = (m + ½) λ₀
λ₀ = [tex]\frac{2nt}{m+ \frac{1}{2} }[/tex]
we substitute
λ₀ = 2 1.50 70.2 10⁻⁹ / (m + ½)
let's substitute some values of m
m = 0
λ₀ = [tex]\frac{210.06}{0.5}[/tex] 10⁻⁹
λ₀ = 421.2 10⁻⁹ m
is in the visible range
m = 1
λ₀ = [tex]\frac{210.6}{1+0.5}[/tex] 10⁻⁹
λ₀ = 140.4 10⁻⁹ m
This outside visible range, is ultraviolet light
What I ferromagnetism??
Answer:
Ferromagnetism is a kind of magnetism that is associated with iron, cobalt, nickel, and some alloys or compounds containing one or more of these elements. It also occurs in gadolinium and a few other rare-earth elements.
Explanation:
Hope this helped Mark BRAINLIEST!!!
How would you classify an EM wave with a frequency of 10^7 Hz?
Answer:
I think it is television and radio wave
If the harmonic is 66 Hz, find the fundamental frequency
Rita is a salon owner. She notices that her salon charged one of her clients, Linda, extra for a service that the clent did not request. What do you think Rita should do? Α. Remaln qulet about the extra money. B. Distribute the money equally among the staff. C. Call the client and Inform her that she was incorrectly charged. D. Try overcharging the next client too and check if it goes unnoticed.
Answer:
C hope it helps
call the client and inform her that she was incorrectly charged.
Answer:
The answer is C. call the client and inform her that she was incorrectky charged
Explanation:
am i right? please help!
Explain why is the temperature of a hot tea higher than the temperature of iced tea?
Answer:
Because the hot tea is hot from a microwave or coffee machine when iced tea is cold from ice in the tea.
Explanation:
You throw a baseball with a mass of 0.5 kg. The ball leaves your hand with a speed of 35 m/s. Calculate the kinetic energy. (SHOW ALL WORK)
Answer:
The kinetic energy of the baseball is 306.25 joules.
Explanation:
SInce the baseball can be considered a particle, that is, that effects from geometry can be neglected, the kinetic energy ([tex]K[/tex]), in joules, is entirely translational, whose formula is:
[tex]K = \frac{1}{2}\cdot m\cdot v^{2}[/tex] (1)
Where:
[tex]m[/tex] - Mass, in kilograms.
[tex]v[/tex] - Speed, in meters per second.
If we know that [tex]m = 0.5\,kg[/tex] and [tex]v = 35\,\frac{m}{s}[/tex], then the kinetic energy of the baseball thrown by the player is:
[tex]K = \frac{1}{2}\cdot m \cdot v^{2}[/tex]
[tex]K = 306.25\,J[/tex]
The kinetic energy of the baseball is 306.25 joules.
Which of the following results when most or all of the neutrons released in a
fission reaction encounter other nuclei?
In your own words, tell me how an element, molecule, and compound are used to make different substances. All three must be mentioned in order to receive full credit.
Answer:
When atoms from different elements are joined together in groups, they form molecules. The atoms in molecules bind together chemically, which means that the atoms cannot be separated again by physical means, such as filtration. The molecule has different properties from the elements from which is was made.
Explanation:
Sample of gas occupies 725 mL at 23°C 920 MMHG find the volume of the gas at standard temperature and pressure
Answer:
V2=809.44 mL
Explanation:
If ans is correct give a comment or ask for explanation with me .
Light travels at a speed of 3.0 ´ 108 m/s. If it takes light from the sun 5.0 ´ 102 s to reach Earth, what is the distance between Earth and the sun?
Answer:
The distance between the Earth and the Sun is:
1.5 multiplied by 10 raised to the power 8 km
Explanation:
(5.0 x 10²) x (3.0 x 10⁸) = 1.5 x 10¹¹ meters = 1.5 x 10⁸ km.
Which of these energy transformations is not part of how a nuclear power plant
provides electrical energy to a home?
changing electrical energy to chemical energy
changing thermal energy to mechanical energy
changing nuclear energy to thermal energy
changing mechanical energy to electrical energy
When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere. Which statement best explains the reason for this situation?
Group of answer choices
A) When the Northern Hemisphere is closer to the sun than the Southern Hemisphere is, the Southern Hemisphere is relatively far from the sun.
B) When the Northern Hemisphere is tilted toward the sun, the Southern Hemisphere is tilted away from the sun.
C) When the Northern Hemisphere is farther from the sun than then Southern Hemisphere is, the Southern Hemisphere is relatively close to the sun.
D) When the Northern Hemisphere is tilted away from the sun, the Southern Hemisphere is tilted toward the sun.
Explanation::i dont know the answer ,but pls then also mark me as brainlist
Answer:
When the N. Hemisphere is tilted away from the sun, the S. Hemisphere is tilted toward the sun
Explanation:
Unlike the idiot down there that just wanted point here you go
EMERGENCY
Parallax
Find the distance to the following stars:
.768”
.09”
.63”
.25”
.125”
What does a charged object experience as it is placed into an electric field?
Answer:
In an electric field a charged particle, or charged object, experiences a force. If the forces acting on any object are unbalanced, it will cause the object to accelerate. With this in mind: If two objects with the same charge are brought towards each other the force produced will be repulsive, it will push them apart.
Explanation:
A wave has a wavelength of 2 meters and a frequency of 1.5 hz. What is its speed
Answer:
3m/s is the answer.
Explanation:
f = c/λ
f = frequency
c = speed (m/s)
λ = wavelength
f = c/λ
1.5 = c/2
c = 3m/s