Answer:
When the temperature increases
Explanation:
5. How many kilowatt-hours of energy would be used by a 40 W bulb that runs for 10 hours every
day during the course of one year?
Answer:
E = 0.4 kWh
Explanation:
Given that,
The power of a bulb, P = 40 W
Time, t = 10 hours
We need to find the energy used by the bulb. Let it is equal to E. So,
[tex]E=P\times t\\\\E=40\times 10\\\\E=400\ W-h\\\\or\\\\E=0.4\ kWh[/tex]
So, 0.4 kWh of energy would be needed.
Answer: 146,000 Wh or 146 kWh
Explanation:
65 days × 10 hours × 40 W = 146,000 Wh or 146 kWh
The noble gas neon is used for filling neon signs. Like other noble elements, it has a full octet (complete outer energy level) of electrons, which makes the gas A. freeze at room temperature. B. react with other gases in the air. C. unlikely to combine with other elements. D. solidify at standard pressure and temperature, chiny pray-colored solid at room
Answer:
C. unlikely to combine with other elements.
Explanation:
In Chemistry, electrons can be defined as subatomic particles that are negatively charged and as such has a magnitude of -1.
Valence electrons can be defined as the number of electrons present in the outermost shell of an atom. Valence electrons are used to determine whether an atom or group of elements found in a periodic table can bond with others. Thus, this property is typically used to determine the chemical properties of elements.
Noble gases are chemical elements with eight valence electrons and as such have a full octet. Some examples are argon, neon, etc.
Hence, the full octet makes the gas (neon) unlikely to combine with other elements.
If the ___ of a material are lined up, the object will be magnetic.
Answer please
will mark brainliest if right
Answer:
Atoms
Explanation:
PLS i really need help.
•you decided to play Flick the coin with your friend. The goal of the game is to flick the coin from the top of a table and let it land of the floor as far as possible. The coin that you flicked left the table (0.8m high) with an initial velocity of 5m/s. Compute the following.
A. Time It will take for the coin to reach the ground.
B. Range (how far from the base of the table will the coin land.with solution
Answer:
A) The time taken by the coin to reach the ground will be 0.4 seconds
B) Range of the motion of the coin will be 2m
Explanation:
This is a case of horizontal projectile motion as there's no initial vertical velocity given to the coin and has only horizontal velocity initially.
According to the equations of Horizontal projectile
[tex]Sy=\frac{1}{2} *g*t^2[/tex] {[tex]Sy =[/tex] Vertical distance traveled , [tex]g=[/tex] acceleration due to gravity of Earth , [tex]t=[/tex] time of flight i.e time taken)[tex]Sx= Vx*t[/tex] ([tex]Sx=[/tex] Range of the projectile ,[tex]Vx=[/tex] initial horizontal velocity, [tex]t=[/tex] time of flight)Given :
Vertical distance to be traveled ([tex]Sy[/tex])= 0.8m
Initial horizontal velocity ([tex]Vx[/tex])= 5m/s
For calculations, we will take acceleration due to gravity ([tex]g[/tex]) to be [tex]10 m/s^2[/tex]
A) Putting values in equation [tex]Sy=\frac{1}{2} *g*t^2[/tex]
⇒ [tex]0.8=\frac{1}{2} *10*t^2[/tex]
⇒[tex]\frac{1.6}{10} =t^2[/tex]
⇒ [tex]\sqrt{0.16} =t[/tex]
⇒ [tex]0.4=t[/tex]
Therefore, time taken by the coin to reach the ground is 0.4 seconds
B) Now using t= 0.4s putting values in equation [tex]Sx= Vx*t[/tex]
⇒[tex]Sx=5*0.4[/tex]
⇒[tex]Sx=2[/tex]
Hence , Range of the coin is 2m
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How many moles are there in 321g of silver hydroxide?
Answer:
2.5705594546378 mol
Explanation:
Used this calculator
http://www.endmemo.com/chem/mmass.php
pls helppp :)List several examples of applied force, normal force, and friction that you’ve observed in your life.
ill mark brainliest if the answer is actually helpful:p
Answer:
an example for applied force is
Explanation:
The applied force is the force applied to the object to either displace it or change its shape.
HOPE THIS HELPS
Look up how much power a typical light bulb uses/produces. Then look up how much power a typical microwave uses/produces. How do these appliances compare to your physical activities?
The current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.
Energy dissipated by electrical applianceThe amount of energy dissipated by an electrical appliance is the calculated using the following formulas;
P = I²R
where;
P is powerI is currentR is resistanceThe current drawn by a microwave is greater than the amount of current used by an electric bulb, hence the microwave consumes more power.
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Use the galvanometers to determine the amount and direction of the induced current. Which galvanometer is
indicating a current of 4 mA?
Answer:
Option B
Explanation:
Looking at the 3 galvanometer readings given above, for galvanometer A, the reading is -2 mA.
For galvanometer B, the reading is 4 mA.
While for galvanometer C, the reading is -5 MA
Thus, option B is correct.
Answer:
B, the second picture
Explanation:
edge 2022
What is the change in gravitational potential energy of a 45 kg weight that is moved from 2 m to 18 m on earth? What is it on the moon (g = 1.6 m/s2)?
Answer:
to find the weight, use the following formula
F= m x g
in Earth---> 45 x 9.8= 441 N
in Moon---> 45 x 1.6= 72 N
Explanation:
I HOPE THIS HELPS!!! :)
The change in gravitational potential energy of a 45 kg weight that is moved from 2 m to 18 m on Earth and Moon are 7.056kJ and 1.152kJ respectively.
What is Gravitational Potential energy?
Gravitational potential energy is defined as the energy possessed by or acquired by an object due to a change in its position when it is present in a gravitational field. This can be said that gravitational potential energy is the energy which is related to the gravitational force or gravitation.
Gravitational potential energy is expressed as
U=m g h
Where, U = gravitational potential energy
m = mass
g = gravitational field
h = height
For above given example,
The change in gravitational potential energy for Earth
mass= 45kg
Difference in height [tex](H_2-H_1)[/tex]= 18-2= 16m
g= [tex]9.8m/s^2[/tex]
U= 45*16*9.8 = 7056J or 7.056kJ
The change in gravitational potential energy for Moon
mass= 45kg
Difference in height [tex](H_2-H_1)[/tex]= 18-2= 16m
g= [tex]1.6m/s^2[/tex]
U= 45*16* 1.6= 1152J or 1.152kJ
Thus, the change in gravitational potential energy of a 45 kg weight that is moved from 2 m to 18 m on Earth and Moon are 7.056kJ and 1.152kJ respectively.
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Two point sources are simultaneously creating waves with a wavelength of 6 cm. Point X lies between the two sources. It is 9 cm from one source and 15 cm from the other. What wave heights do you expect at point X? A. The waves will never get very high or low. B. The waves may get very high, but will never get very low. C. The waves may get very low, but will never get very high. D. The waves will sometimes get very high and very low.
Answer:
OPTION D (The waves will sometimes get very high and very low) is the answer.
Explanation:
Wavelength = velocity ÷ frequency
As the frequency which measures the number of waves per unit of time is inversely proportional to the wavelength, point X which lies between two sources, and one source is shorter than another, the wave heights at point x will vary as the distances from point X vary too. This means that waves at point X depending on the wave type and source will get very high at times and very low.
The table below includes data for a ball rolling down a hill. Fill in the missing data values in the table and determine the acceleration of the rolling ball. Also find the final Acceleration. Please make sure to fill out the table. Thank you sm!
Please help lol I'm not ver good at these ones
Answer:
Following are the responses to the given question:
Explanation:
Please find the attached table.
[tex]\to t= 10\ /sec\\\\ \to v = 15\ m /sec\\\\ \to a= ?\\\\\to a=\frac{v}{t}\\\\[/tex]
[tex]=\frac{15}{10}\\\\=1.5[/tex]
17. Which element has 57 neutrons?
Answer:
where are the answers
Explanation:
Water in a tank which is positioned 5 feet above the ground is _____ potential energy? (answers would be like thermal, electric, mechanical)
Answer:
Mechanical
Explanation:
The tank is at rest. And energy of any substance at rest is known as potential energy.
Now, in forms of energy, potential energy is a type of mechanical energy.
Thus, the correct option is mechanical Energy.
explain newton's second law of motion
Answer: Newtons second law of motion: the acceleration of an object is directly related to the net force and inversely related to its mass. ... So, the force/mass ratio (from the equation acceleration = force/mass) is the same for each. Therefore, the acceleration is the same and they reach the ground at the same time.
Explanation:
Hope this helps you! Have a good day!
Answer:
Newton's second law states that the acceleration of an object is directly related to the net force and inversely related to its mass. ... So, the force/mass ratio (from the equation acceleration = force/mass) is the same for each. Therefore, the acceleration is the same and they reach the ground at the same time.
Example:Newton's Second Law of Motion says that acceleration (gaining speed) happens when a force acts on a mass (object). Riding your bicycle is a good example of this law of motion at work. Your bicycle is the mass. Your leg muscles pushing pushing on the pedals of your bicycle is the force.
Explanation:
~Hope this helps
Miles Tugo and Ben Travlun are riding in a bus at highway speed on a nice summer day when an unlucky bug splatters onto the windshield. Miles and Ben begin discussing the physics of the situation. Miles suggests that the momentum change of the bug is much greater than that of the bus. After all, argues Miles, there was no noticeable change in the speed of the bus compared to the obvious change in the speed of the bug. Ben disagrees entirely, arguing that that both bug and bus encounter the same force, momentum change, and impulse. Who do you agree with
Answer:
Ben os ok. the moment of the bus and the worm are conserved
Explanation:
System formed by the bus and the worm, therefore the forces during the collision are internal and therefore the moment is conserved
initial instant. Airs of shock
p₀ = My v₀
final instant. After the shock
p_f = (M + m) v
the moment is preserved
p₀ = p_f
M v₀o = (M + m) v
v = [tex]\frac{ M}{ M+m}[/tex] v₀
v = [tex]\frac{1}{1 +\frac{m}{M} }[/tex] v₀
Let's analyze these equations the moment of the bus and the worm are conserved, therefore Ben is the one who is right. Let us propose the solution of the problem.
The person that I agree with based on their stance about the physics of the situation is; Ben Travlun
Conservation of MomentumI will agree with Ben Travlun. The reason is that;
From the question, we see that the bug and the bus experience the same force, the same impulse, and the same momentum change.
Now, the concept of sameness above is not portrayed by Miles' statement because miles claims that the momentum change of the bug is much greater than the bus.
Now, though the bug has less mass and therefore more acceleration, the occupants of the very big bus will not feel the unusually small acceleration.
Finally, the bug is composed of a less strong material and as a result it will be scattered all over the windshield. However, this high level of the bug being scattered and the greater acceleration it possesses does not translate to greater force, impulse, or momentum change.
Read more about conservation of momentum at; https://brainly.com/question/7538238
How can we create a new element by combining all the other elements
Answer:
In order to create a new element you have to change the number of protons in a nucleus.
Which of the following is true of alternating current? Select all that apply.
- The net position of the electrons remains the same.
- Electrons always flow in one direction.
- Electrons reverse direction periodically.
- It waveform is the sine wave.
Answer:
The correct option is (C).
Explanation:
Electric current can be direct or alternating.
The direct current flows only in one direction. It is unidirectional.
The alternating current or an C current reverse its direction periodically.
So, the correct statement regarding the alternating current is (c) i.e. Electrons reverse direction periodically.
What is the output voltage?
Answer:
120 volts
Explanation:
The output voltage is the voltage released by a device, such as a voltage regulator or a generator. Voltage regulators maintain constant voltage levels. A conductor carries the output voltage to various destinations, such as homes and businesses.
The more dense the liquid, the higher the __________ at a particular depth.
Answer:
The higher the pressure
The coach of the Philadelphia Eagles walks back and forth along the sidelines of Lincoln Financial Field fifteen times in three minutes. What is the frequency of his pacing? Remember to change the time to seconds.
Jupiter's gravity is about 2.3 times stronger than Earth's gravity. Calculate the
mass and weight of a scientific instrument if it were on the surface of Jupiter,
given its mass and weight on Earth's surface.
On Earth's Surface
On Jupiter's Surface
Mass
54 ks
A.
B.
Weight
529 N
What is A
What is B
Answer:
Explanation:
There is no change in mass. Therefore, mass = 70 k g
Weight on Jupiter ≈ 1578 N
A +0.0129 C charge feels a 4110 N
force from a -0.00707 C charge. How
far apart are they?
[?] m
Answer:
r = 14.13 m
Explanation:
Given that,
Charge 1 = +0.0129 C
Charge 2 = -0.00707 C
The force between charges, F = 4110 N
We need to find the distance between charges. Let the distance be r. The force between two charges is given by :
[tex]F=\dfrac{kq_1q_2}{r^2}\\\\4110=\dfrac{9\times 10^9\times 0.0129\times 0.00707}{r^2}\\\\r=\sqrt{\dfrac{9\times 10^9\times 0.0129\times 0.00707}{4110}} \\\\r=14.13\ m[/tex]
So, the distance between charges is equal to 14.13 m.
Answer:
14.13 m
Explanation:
acellus
A wheel initially rotating at 12 rad/s decelerates uniformly to rest in 0.4 s. If the wheel has a rotational inertia of 0.5 kg.m², what is the magnitude of the torque causing this deceleration? (A) 1.5 N.m (B) 15 N.m (C) 30 Nm (D) 38 Nm
Answer:
(B) 15 N.m
Explanation:
The deceleration of the wheel is first found by using the following formula:
[tex]\alpha = \frac{\omega_f - \omega_i}{t}[/tex]
where,
α = angular acceleration = ?
ωf = final angular speed = 0 rad/s
ωi = initial angular speed = 12 rad/s
t = time = 0.4 s
Therefore,
[tex]\alpha = \frac{0\ rad/s - 12\ rad/s}{0.4\ s}\\\\\alpha = -30\ rad/s^2[/tex]
here, the negative sign shows deceleration.
Now, we find the torque responsible for this deceleration:
[tex]\tau = I\alpha[/tex]
where,
τ = torque = ?
I = rotational inertia = 0.5 kg.m²
Therefore,
[tex]\tau = (0.5\ kg.m^2)(30\ rad/s^2)\\[/tex]
τ = 15 N.m
Therefore, the correct answer is:
(B) 15 N.m
Una mujer de masa m está parada en el borde de una mesa giratoria horizontal de momento de inercia I y radio R. La mesa al principio está en reposo y tiene libertad de moverse alrededor de un eje vertical sin fricción que pasa por su centro. La mujer empieza a caminar alrededor de la orilla en direción de las manecillas del reloj (vista desde arriba) a una velocidad constante v en relación a la Tierra.
a) En qué dirección y con qué velocidad angular gira la mesa?
b) Cuál es el trabajo efectuado por la mujer para poner en movimiento la mesa?
r
[tex]- \frac{mR^2 }{I } \ v[/tex]Answer:
a) w = - [tex]\frac{m r }{I} v[/tex] , b) W = - ½ m_woman R² (1 + m_woman R / I²) v²
Explanation:
a) To solve this exercise, let's use the conservation of angular momentum.
We define a system formed by the table and the woman, therefore the torques are internal and the moment is conserved
initial instant. Before starting to move the woman
L₀ = 0
final instant. After starting to move
L_f = I w + m v r
the moment is preserved
L₀ = L_f
0 = Iw + m v r
w = - [tex]\frac{m r }{I} v[/tex] (1)
the direction of the angular velocity is opposite to the direction of the linear velocity, that is, counterclockwise
b) for this part we use the relationship between work and kinetic energy
W = ΔK
in this case the initial speed is zero and the final speed of the table, using the relationship between linear and angular variables
v = w r
we substitute
W = 0 - ½ I_total w²
I_total = I + m_{woman} R²
W = - ½ (I + m_woman R²) ( [tex]\frac{m_{woman} R}{I} \ v[/tex]) ²
W = - ½ (m_woman² R² + m_woman³ R³ / I²) v²
W = - ½ m_woman R² (1 + m_woman R / I²) v²
A string 1.30 meters in length is oscillating in its first harmonic. The frequency of
oscillation is 7.80 Hz. What is the wavelength of the first harmonic?
Answer:
2.6m
Explanation:
The formula for calculating the wavelength is expressed as;
λ = v/f
v is the velocity
f is the frequency of vibration
Given
f = 7.80Hz
We need to get the velocity
For string;
f = V/2L
7.80 = V/2(1.3)
7.80 = V/2.6
V = 2.6 * 7.8
V = 20.28m/s
Get the required wavelength
λ = v/f
λ = 20.28/7.80
λ = 2.6m
Hence the wavelength of the first harmonic is 2.6m
Which of these shows the position of the Sun, Moon, and Earth when a full moon phase occurs? (8.7B)
Answer:
Lunar eclipse
Explanation:
Lunar eclipse occurs when Earth comes in between sun and Moon. The moon is either partially or fully blocked and the moon sighting appears to be black from earth since the light rays coming from sun are blocked by Earth. Lunar eclipse occurs only at full moon. The moon is aligned with the position of earth and sun so that they all form a straight line.
Which statement is true about Car A?
Car A has a velocity of 40 km/hr
west.
Car A has a velocity of 40 km/hr
east.
Car A has the same velocity Car E.
Car A has a velocity of 40 km/hr.
Answer:
Car A has a velocity of 40 km/hr west.
Explanation:
The velocity of an object is a vector quantity. It has both magnitudes as well as direction.
Arrows are used to show direction.
Car A is moving towards west. Car B is moving towards east-south direction. Car C is moving towards South direction. Car E is moving towards North direction.
So, the correct option is (a) i.e. Car A has a velocity of 40 km/hr west.
What are 3 procedures of having(making) spinners? Help!
Answer:
The bearings are generally ceramic, metal (stainless steel or chrome), and some are hybrids—such as ceramic balls with stainless races and cages.
Explanation:
good luck
the distance and direction between starting and ending positions
Answer:
The length traveled by an object moving in any direction or even changing direction is called distance. The location of an object in a frame of reference is called position. For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement
Explanation:
good luck
why don't you have to make your heart beat?
Answer:
Some muscles in the body are “involuntary”, which means you can't control them. The heart is made of a special involuntary muscle called cardiac muscle, and this muscle is made up of cells called cardiomyocytes (which literally means “heart muscle cells” in Latin)