Answer:
D. A dry cell battery
Explanation:
A dry cell is a type of electric battery, commonly used for portable electrical devices. It was developed in 1886 by the German scientist Carl Gassner, after development of wet zinc-carbon batteries by Georges Leclanché in 1866.
Answer:
A dry cell battery
Explanation:
Please answer as soon as possible.
A Physics question about electricity and circuits.
A ray in oil (n = 1.52) reaches a boundary with water (n = 1.33) at 55.9 deg. Does it reflect internally or refract into the air?
Answer:
Ray reflects internally
Explanation:
Given:
Ray in oil (n1) = 1.52
Ray in water (n2) = 1.33
θ = 55.9°
Computation:
Step 1 . Find critical angel(θc)
Sinθc/Sin90° = Ray in water / Ray in oil
Sinθc/1 = 1.33/1.52
θc = 61°
Since, θ = 55.9° is smaller than θc = 61°
So, Ray reflects internally.
Answer: refracts it
Explanation: i used the answer on acellus
and it was wrong
What is the potential energy of two charges of +4.6 μC and +1.0 μC that are separated by a distance of 10.0 cm?
Answer:
U = 0.413 J
Explanation:
the potential energy between two charges q1 and q2 is given by the following formula:
[tex]U=k\frac{q_1q_2}{r}[/tex] (1)
k: Coulomb's constant = 8.98*10^9 NM^2/C^2
q1: first charge = 4.6 μC = 4.6*10^-6 C
q2: second charge = 1.0 μC*10^-6 C
r: distance between charges = 10.0 cm = 0.10 m
You replace the values of all variables in the equation (1):
[tex]U=(8.98*10^9Nm^2/C^2)\frac{(4.6*10^{-6}C)(1.0*10^{-6}C)}{0.10m}=0.413\ J[/tex]
Hence, the energy between charges is 0.413 J
Which of the following is an example of a noninfectious disease?
A. hepatitis
B. food poisoning
C.the flu
D. lung cancer
Answer:
D. lung cancer
Explanation:
pls mark brainliest
What are two layers that can stop alpha radiation?
non-ionizing radiation and ionizing radiation.
If someone upsets you, it is your responsibility to make changes so that they don’t do it again. A. True B. False
Answer:the answer is true
Explanation:
I’m taking the test right now!
Comparing X-ray to radio wave, which has a shorter wavelength?
X-ray
radio wave
they both have the same wavelength
Other:
Answer:
x-ray
Explanation:
X-rays can penetrate through matter because of their high frequencies while radio waves are not able to do so as much. If you think about it, taking an x-ray requires a lot more energy than for radio waves to allow you to listen to songs on the radio. Hope this helps :)
HELP PLEASE WITH THE HIGHLIGHTED
Answer:
flash from marvel
mach is:
In fluid dynamics, the Mach number is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound.
Explanation:
When lunging or squatting, your knees should not: A. Be out of alignment with your ankles B. Come forward past your toes C. Bend your knees to 45 degrees D. All of the above
Answer:
B, come past your toes.
Explanation:
Answer:
B i just took the quiz
Explanation:
Car A
Mass: 1,500 kg
Velocity: 10 m/s
Car B
Mass: 1,500 kg
Velocity: 25 m/s
Car C
Mass: 1,000 kg
Velocity: 10 m/s
Which order shows decreasing momentum?
car c
because light weight objects can move fast but it goes slow
hope it helps :-)
Answer:
B,A,C
so yeah
You stand on a bridge above a river and drop a rock into the water below from a height of 53 m. What is the acceleration of the rock as it falls
Answer:
9.8
Explanation:
Accereration due to gravity
Answer:
9.8 m/s^2
Explanation:
Acceleration due to gravity (freefall)
PLEASE HELP!!!!! An electron jumps from one energy level to another in an atom radiating 4.5*10^-19 Joules. If Planck's constant is 6.63*10^-34Js, what is the wavelength of the radiation? (C =3*10^8) 2)
Answer: λ = 4.42 × 10^-7 metres
Explanation:
The emitting radiation energy is the change in energy dE. Where
dE = 4.5×10^-19J
Planck's constant h = 6.63*10^-34Js,
Speed of light C = 3×10^8
The wavelength(λ) of the radiation can be calculated by using the formula
(λ) = hC/dE
Substitute all the parameters into the formula above
(λ) = (6.63×10^-34 × 3×10^8)/4.5×10^-19
(λ) = 1.989^-25/4.5×10^-19
(λ) = 4.42×10^-7 m
Therefore, the wavelength (λ) of the radiation is 4.42 × 10^-7 metres
Two runners ran side by side each holding one end of a horizontal pole. What would most likely happen if one of the runners began jogging in knee-deep water?
Answer:
Hope this helps :)
The runner in the water would be going slower than the other runner. The pole would be in a slanted position and one runner would be ahead of the other.
Explanation:
Water makes you slow down, therefore it would cause the runner jogging in knee deep water to move slower than the runner outside of the water. Because one runner is moving slower than the other, the pole would be in a slanted position.
The runner throughout the water would've been traveling at a moderate speed than some of the other speeds.
This same pole would've been angled, as well as one runner would've been forward of one another. Water slows someone downward immediately, which is why a runner running in lower extremity waters will go slower than that of a racer beyond the waters or pool. Although one runner was traveling slower than another and, the flagpole would've been tilted.Thus the above response is correct.
Learn more:
https://brainly.com/question/22248328
O A. Feeding sugar to a child at times will not harm the child.
O B. Bribing a child is okay if used judiciously in critical situations.
OC.
It is alright to argue in a mature manner in front of kids.
OD
You should always deal with misbehavior firmly.
Answer:
Bribing a child is okay if used judiciously in critical situations.
You should always deal with misbehavior firmly.
Hope this helps..Pls mark as Brainliest!!
Answer:
B. Bribing a child is okay if used judiciously in critical situations.
D. You should always deal with misbehavior firmly
Hope this helps, and please mark me brainliest if it does!
A space shuttle is sitting stationary at the launch pad.
What is the kinetic and potential energy of the shuttle?
A. potential energy: low
kinetic energy: low
B. potential energy: low
kinetic energy: zero
C. potential energy: high
kinetic energy: low
D. potential energy: high
kinetic energy: zero
Answer:
The answer is B.
Explanation:
I got the question right on this one.
Answer:B. potential energy: low
kinetic energy: zero
Explanation:
A yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. What is the frequency of this light?
Answer:
Frequency, [tex]f=5.24\times 10^{14}\ Hz[/tex]
Explanation:
It is given that, a yellow laser provides 210 kJ/mol of energy to excite electrons in a sample. We need to find the frequency of this light.
Energy, E = 210 kJ/mol
i.e.
[tex]E=210\ \dfrac{kJ}{mol}\\\\E=210\times 1000\ \dfrac{J}{mol}\\\\E=\dfrac{21\times 10^4\ J/mol}{6.022\times 10^{23}\ /mol}\\\\E=3.48\times 10^{-19}\ J[/tex]
The energy used to excite electrons is given by :
[tex]E=hf\\\\f=\dfrac{E}{h}\\\\f=\dfrac{3.48\times 10^{-19}}{6.63\times 10^{-34}}\\\\f=5.24\times 10^{14}\ Hz[/tex]
How do the discovery of gravity and the invention of electronic satellites most likely relate to the processes of scientific investigation and technological design?
A) Engineers used the process of technological design to discover how gravity holds matter in orbit, and then scientists investigated satellites in nature.
B) Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
C) Since scientists were curious about gravity, they used the process of scientific investigation to build the first object that would orbit Earth.
D) Technological designers invented the electronic satellite, and then scientific investigators conducted research to learn how and why it orbited around Earth.
Answer:
(B)Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
Explanation:
The discovery of gravity and the invention and electronic satellites most likely relate to the Scientific investigations that discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites. The correct option is B).
What are electronic satellites?Satellites offer three different kinds of communication services: telephony, broadcasting, and data communications. Telephone calls and services offered to wireless, mobile, and cellular network providers as well as telephone businesses are examples of telecommunication services.
Therefore, the correct option is B) Scientific investigations discovered that gravity holds objects in orbit, and then technological designers used the discovery to develop electronic satellites.
To learn more about electronic satellites, refer to the link:
https://brainly.com/question/9266911
#SPJ2
20 point question B)
Description:
As we know that the sun offers what most of the world has to go examples could be energy, air. As we also know that heating causes liquid and water that is frozen to evaporate to water vapour gas. Meaning the sun provides the energy necessary for evaporation.
Answer: B
Please mark brainliest
Hope this helps.
The human brain can handle only one attention-consuming task at a time
T
F
Answer:
that statement is true, trust me lol
1.)A circuit has a current of 0.5A and a resistence of 8 ohms. What is the resistence? 2.) A circuit has a voltage of 9V and a current of 3A, what is the resistence?
1. are you serious asking the resistance? it's 8 Ohms. if you ask the voltages the result is
v = i . r
v = 0.5 . 8 = 4V
2. r = V/i = 9/3 = 2 ohm
A 0.500 kg mass is oscillating on a
spring with k = 330 N/m. The total
energy of its oscillation is 3.24 J. What is the maximum speed of
the mass?
thank you in advance for your help!
Answer:
3.6m/s
Explanation:
The following data were obtained from the question:
Mass (m) = 0.5Kg
Spring constant (K) = 330N/m
Energy = 3.24J
Velocity (v) =..?
The velocity of the mass can be obtained as follow:
E = ½mv²
3.24 = ½ × 0.5 × v²
3.24 = 0.25 × v²
Divide both side by 0.25
v² = 3.24/0.25
Take the square root of both side
v = √(3.24/0.25)
v = 3.6m/s
Therefore, the speed of the mass is 3.6m/s
Help.
1. why does the sun have the greatest amount of gravity in our solar system?
2. Explain why the force of gravity is the greatest between the sun and mercury?
3. why do you think mercury and all of the other planets do not fall into the sun?
Answer:
1.because we are not that near the sun.
2.because mercury is closer to the sun so the Mercury takes the greatest gravity.
3.because of the centripetal force
3. The circuit below shows two outdoor lights, run by a battery. Four amps of
current leave the battery. Explain how the current splits to go through both light
bulbs. Be as specific as you can.
Answer:
The answer to your question is given below.
Explanation:
From the diagram given in the question, we can see that the bulbs are in parallel connection. This implies that different current will go through the bulb but the same voltage. But the resistance of each bulb is the same, therefore the same current current will go through them.
This can further be understood if we determine the current flowing through each bulb. This is illustrated below:
Voltage (V) = 30V
Resistant 1 (R1) = 15Ω
Current 1 (I1) =..?
V = I1R1
30 = I1 x 15
Divide both side by 15
I1 = 30/15
I1 = 2A.
Voltage (V) = 30V
Resistant 2 (R2) = 15Ω
Current 2 (I2) =..?
V = I2R2
30 = I2 x 15
Divide both side by 15
I2 = 30/15
I2 = 2A.
The overall current(I) in the circuit:
I = I1 + I2
I = 2 + 2 = 4A.
From the illustrations above, we can see that the same current will flow through each bulb as the will current split into two equal parts
Help.
1. why is the greenhouse effect important to life on earth?
2. How is the greenhouse effect related to the problem of global warming?
Answer:
1. the greenhouse effect is important cause they hold onto some of earths heat. The heat that it traps is whats keeping our planet warm.
2. when u have too much of the gas than the earth becomes hotter. similar to when the the earthy gets 1 degree hotter.
If we have several different light bulbs connected to a battery in series, then ___.
The resistance will be the same across each bulb.
The current will be the sum of individual voltages across each bulb.
The current will be the same across each bulb.
The voltage will be the same across each bulb.
Answer:
The current will be the same across each bulb.
Nephrons and filtration work because the fluid going into the nephron capsule is under _________ pressure than the fluid outside the capsule.
Answer
Hydrostatic pressure
Explanation:
Filtration occurs as pressure forces fluid and solutes through a semipermeable barrier with the solute movement affected by particle size. Hydrostatic pressure is the pressure produced by a fluid against a surface. The blood inside the glomerulus creates glomerular hydrostatic pressure which forces fluid out of the glomerulus into the glomerular capsule. The fluid in the glomerular capsule creates pressure pushing fluid out of the glomerular capsule back into the glomerulus, opposing the glomerular hydrostatic pressure. This is the capsular hydrostatic pressure. These fluids exert pressures in opposing directions. Net fluid movement will be in the direction of the lower pressure.
A denser medium will generally make a sound wave travel
faster
the same speed
not at all
slower
The correct answer is A. Faster
Explanation:
Sound, which is composed of vibration, travels through waves. Additionally, the speed of sound waves is affected by the medium and the density of it. Indeed, the denser the medium is the higher the speed of sound is. For example, in the air, the speed of sound is around 343 meters per second while in water and similar liquids that have a higher density the speed is approximately 1500 meters per second, and this speed increases if the sound travels through a solid. This occurs because in dense substances particles are closer, and therefore waves can travel faster. Thus, in a denser medium will generally make a sound wave travel faster.
What are the seven different forms of energy? Give an example of each.
Answer:
Form of energy: Example
1. Light energy: Electromagnetic radiation
2. Nuclear energy: Nuclear fission
3. Chemical energy: Energy stored in plant matter
4. Electrical energy: Lightning
5. Thermal energy: A hot surface
6. Sound energy: A tuning fork
7. Solar energy: Energy from the Sun
8. Mechanical energy: A moving vehicle
A student finds a resistor in an old transistor radio. When the resistor is attached to a 1.5 V cell, the flow of current is measured at 0.025 A. When the resistor is attached to four 1.5 V cells, the current is measured at 0.1 A. When the resistor is attached to a 9 V battery, the current is measured at 0.15 A. Is the resistor an ohmic resistor? Explain how you know.
Answer:
yes
Explanation:
because no matter what voltage you connect it up to, the current always increases proportionally to the voltage.
this is because it follows ohm's law V = I X R.
(voltage = current X resistance)
so to calculate the resistance, change the formula to R = V / I giving you 60 ohm (resistor value)
the value of the resistor is always 60 ohm's, no matter which combination of voltage and current you used and measured, so it follows ohm's law, therefore being an ohmic resistor
The length of a vector indicates the magnitude of the vectoor
A. True
B. False
Answer:
True
Explanation:
