Answer:This could be in the form of using fewer energy services or using devices that require less energy.
Explanation:
14. The resistance of dry human skin is about 500,000 ohms and wet,
sweaty, human skin is about 1000 ohms. How much current passes across
someone's fingers if they touch the leads of a 9 Volt battery when their skin
is WET?
Answer:
current is equal to V/R
Explanation:
I = 9/1000A
[tex]9 \times 10 ^{ - 3} [/tex]
What pressure is transmitted to the wheel cylinder if 200N is applied on the brake pedal of master cylinder with a radius of 12cm?
Answer:
pressure = force/area
force = 200N
area = πr², π =3.142, r = 12 cm = 0.12 m
pressure = 200/3.142×(0.12)²
p = 200/3.142×0.24
p = 200/0.754
p = 265.25 Nm-¹ or 265.25 Pa
Humans sleep in cycles, usually two or three cycles per night. There is a point in each cycle when waking up will leave the sleeper feeling the most rested and refreshed.
After learning about this, a computer programmer designed a new smartphone alarm clock. This new alarm clock uses sensors in the smartphone to detect the sleeper’s motion and determine when the sleeper has reached the best point in the sleep cycle at which to wake up. The app can be downloaded onto any smartphone. Most users who download this app find that it does not help them wake up feeling more refreshed, but they are willing to try improved products in the future.
Which criterion did this sleep cycle alarm clock fail to meet?
It did not solve the problem.
It was not cost effective enough.
It was not readily available.
It was not safe for most users.
Answer:
A
Explanation:
It did not solve the problem.
How should Simon use the theory of relativity to
describe what the astronaut must do in order to hit the
button?
Simon is writing a story about an astronaut whose
spacecraft has been boarded by space pirates. The
astronaut has her lucky penny in her hand behind her
back as the space pirates break into the control room.
She has just locked the controls so that the ship is
accelerating in the direction of the control room's
ceiling. Simon wants the astronaut to use the penny to
hit a button on the control panel to turn off the lights
and escape. The button is located a short distance
behind and below the astronaut's hands.
O The astronaut should toss the penny straight up as
it will appear to fall in an arc because objects in an
accelerating frame of reference behave in the same
way as they would in a gravity field.
O The astronaut should just let the penny go, as the
control panel will accelerate upward and curve
toward the astronaut because there is no gravity
field
O The astronaut should toss the penny horizontally
straight behind her as it will appear to fall in an arc
because objects in an accelerating frame of
reference behave in the same way as they would in
a gravity field.
The astronaut should toss the
Answer:
C
Explanation:
Answer:
c
Explanation:
edge
A convex lens has a focal length of 12 cm, and has an object 8 cm from it. What is the magnification of the image?
Question 1 options:
1.5
1
3
2
Answer:
1.5
Explanation:
Sarah is demolishing two clock towers, one on either side of the city. She sets up the explosives to go off at the same time when she sends the signal from the center of the city. She sends the signal and sees both clock towers blow up at the same time and sees both towers show 1pm exactly. Adam is flying past the earth traveling at a speed close to the speed of light as sees the building farthest away from him blow up first. Explain how Sarah can see them blow up at the same time, but Adam sees them blow up at different times.
Answer:
According to Lorentz transformation, the time observed of by objects moving in different reference frames are related to their velocity of motion and the speed of light
The time measured by Sarah who is located at the source of the signal and the center of the explosion is different from the time measured by Adam who is moving relative to Sarah and observes the signals moving at different speeds and therefore observes the buildings blow up not immediately but at different times
Explanation:
The time and space dilation equations are given as follows;
[tex]\Delta t = \dfrac{\Delta t'}{\sqrt{1 - \dfrac{v^2}{c^2} } }[/tex]
[tex]L = L' \times \sqrt{1 - \dfrac{v^2}{c^2} }[/tex]
Where;
Δt' = The time measured by Adam
Δt = The time measured by Sarah
L' = The distance measured by Adam
L= The distance measured by Sarah
v = The velocity at which Adam is moving
Let 'u' represent the speed of the signals
Given that Adam is traveling in between the two clock towers such that one signal is moving in the opposite direction towards him while the other signal moves in the his direction, by relativistic velocity addition, we have;
The velocity with which Adam observes the signal coming towards him, v' is given as follows;
v'' = (v + u)/(1 + v·u/c²)
∴ v'' > v
For the signal moving in the direction of Adam, we have;
v''' = (v - u)/(1 - v·u/c²)
v''' < v
Therefore, we have;
The time it takes the light to reach Adam from the furthest Tower which he passes as he is flies past Sarah in the middle, Δt'' is given as follows;
[tex]\Delta t'' = {\Delta t'} \times {\sqrt{1 - \dfrac{v''^2}{c^2} } }[/tex]
For the closer tower which Adam approaches, we have;
[tex]\Delta t''' = {\Delta t'} \times {\sqrt{1 - \dfrac{v'''^2}{c^2} } }[/tex]
Given that v'' > v''', therefore Δt'' < Δt''' and the time the light from the furthest building is seen first by Adam before the light from the closer building.
PLEASE HELP ASAP, WILL MARK BRAINLIEST!!!!
Answer:
it's yellowish orange (3)
Explanation:
A grapefruit has a pH of somewhere between 2.9-3.3 and it is quite acidic. The juice of a grapefruit can cause erosion of tooth enamel and cause damage to one's teeth if ate excessively
please help me with these 2 questions :D
Answer:
Explanation:
1- incident ray
2- the substance through which the wave travels
Answer: the incident ray(the incident ray is the ray striking the mirror at the point of incidence while the refracted ray is the ray leaving the mirror)
The substance through which the ray or wave travels.
Which describes time dilation?
The faster an object moves, the more stretched time becomes.
The more slowly an object moves, the more stretched time becomes.
The faster an object moves, the more time it takes for light to travel a given distan
O The faster an object moves, the less time it takes for light to travel a given distanc
Answer:
A). The faster an object moves, the more stretched time becomes.
Explanation:
'Time dilation' is described as the 'slowing of the passage of time experienced by objects in motion relative to an observer that is measurable only at the relative speeds.' As per this particular relativity theory, the observer witnesses an elongated time with reference to the other setting. This reduction in speed of time(slowing down) becomes more clear and evident in the case of an object moving briskly near to the light's speed. Thus, option A is the correct answer.
Please help its a weird and confusing question?
Explain why gravity changes from place to place. For example why does gravity change in different planets please help
a). Gravity does change across the surface of the Earth and throughout its atmosphere, due to several effects. First, there is the variation of gravity with latitude that you alluded to: you weigh about 0.5% more at the poles than on the equator. ... Second, gravity does indeed change with altitude.
b). That's because the planets weigh different amounts, and therefore the force of gravity is different from planet to planet. For example, if you weigh 100 pounds on Earth, you would weigh only 38 pounds on Mercury. That's because Mercury weighs less than Earth, and therefore its gravity would pull less on your body.
Do noble gases lose or gain electrons to get a full valence shell?
What is the total resistance of the circuit shown below?
(Please help)
[tex]\huge{ \mathfrak{ \underline{Answer : }}} [/tex]
In the given figure, the resistors are joined in parallel connection.
Let's solve for total resistance [tex]R_t[/tex] :
[tex] \dfrac{1}{R_t} = \dfrac{1}{ R_1} + \dfrac{1}{R_2} [/tex][tex] \dfrac{1}{R_t} = \dfrac{1}{20} + \dfrac{1}{30} [/tex][tex]\dfrac{1}{R_t} = \dfrac{3 + 2}{60} [/tex][tex]\dfrac{1}{R_t} = \dfrac{5}{60} [/tex][tex]{R_t} = \dfrac{60}{5} [/tex][tex]{R_t} = 12 \: \: ohms[/tex]____________________________
[tex]\mathrm{ \#TeeNForeveR}[/tex]
Question 10 (1 point)
Identify the list below that contains items that diverge light rays.
Question 10 options:
Convex lens and concave mirror
Convex lens and concave lens
Convex mirror and concave lens
Convex mirror and concave mirror
Explanation:
convex mirror and concave lens
convert 40 HP into watt
Answer: 29828 watts
Explanation: hope that helped bro
Ano ang kahulugan ng padamdam?
Ang pandamdam ay nagpapahayag ng matinding damdamin.
hope this helps!
please give me brainliest.
thank you!
While working on a design for a new roller coaster, the designers noticed that the roller coaster cars did not have enough energy to complete the loop. How should they adjust the track so that the cars can complete the loop?
A. Decrease the height of the hill before the loop because that would decrease the kinetic energy of the cars.
B. Increase the height of the hill before the loop because that would decrease the kinetic energy of the cars.
C. Increase the height of the hill before the loop because that would increase the kinetic energy of the cars.
D. Decrease the height of the hill before the loop because that will increase the kinetic energy of the cars.
Answer: B
Explanation:
It can be said that wave length and frequency are _____________ to each other.
A. Indirectly related
B. Directly related
C. Friendly
D. Not at all related
If forces are unbalanced, what is one thing about the object that can change?
A. Location
B. Direction
C. Volume
D. Shape
All moving objects have ____________.
A. Distance
B. Force
C. Time
D. Momentum
Answer:
1. directly related 2. C 3. D
Explanation:
Answer:
1. A
2. B
3. D
Explanation:
im not 100% sure so if any of these are wrong i apologize
Magnitud del momento de una fuerza respecto a un punto cuando la línea de acción de la fuerza pasa por dicho punto.
Answer:
τ = 0
Explanation:
The moment of a force is defined by
τ = F x r
where bold indicates vectors.
We can write this equation in module form
τ = F r sin θ
the amount without ea r is called the breaststroke and is the distance perpendicular to the pivot point.
The line of action of the force passes through the turning point whereby
r = 0,
Consequently the moment is also zero
τ = 0
Which one of these wireless technologies is not in the permeable zone of the radio wave spectrum?
1. remote-controlled toy
2. broadcast television
3. garage door opener
4. weather radar
The amount of sea ice and permafrost have steadily decreased near Shishmaref, Alaska, over the last century. The loss of ice has allowed ocean waves to erode the land and destroy property. What might be causing this melting?
Answer:
Climate change, where there is an increase in the average temperature, due to continuous human activities. These activities increase greenhouse gases in the atmosphere.
Explanation:
Alaska is the largest state in the United States, and it has a cold climate. The climate changed over time as human activities such as coal mining contributed to greenhouse gas emissions leading to global warming. Over the years. the variations in weather leading to climate change melt the permafrost (frozen ground below the soil surface) causing ocean waves to erode the land and destroy property.
Electromagnetic waves are a form of what type of energy?
Let me know if its correct or incorrect.
Answer:
The correct answer is - radiant.
Explanation:
Electromagnetic waves are the transverse waves that get energy as radiation from the source and transfer to an absorber so, the radiant energy is the energy of electromagnetic waves.
Electromagnetic waves are can travel in space unlike mechanical waves and are made up of photons, tiny packets of energy. Electromagnetic waves or spectra include radio waves, infrared, light, microwaves, UV, X-rays, and gamma rays.
Explain how center of mass helps the system to move as well as rotate
Since Newton's laws dictate that the center in mass of every system of material points would travel along a straight line in the absence of external powers. The body will turn and rotate in almost any direction if there is an external field of forces.
what characteristic describes what happens during a physical change
Which statement did Ernest Rutherford make about atoms?
A. Atoms are different for different elements.
B. The atom has a small, dense center.
O C. The atom is made up of smaller particles.
D. The energy of an electron depends on its specific orbit.
The statement did Ernest Rutherford make about atoms will be the atom has a small, dense center. Then the correct option is B.
What is the Ernest Rutherford model?The majority of alpha particles went right through the gold foil, signifying that particles are mostly made up of empty space. Several alpha particles were mildly distracted, indicating interactions with positively charged particles within the unit. Some alpha particles were spread at wide degrees, with a few even returning to the source.
Rutherford characterized the atom in 1911 as having an understanding, dense, and ionized center termed the nucleus. Rutherford discovered that the mass of an atom is possessed in its nucleus.
The atom has a small, dense center. Thus, option B is correct.
More about the Ernest Rutherford model link is given below.
https://brainly.com/question/5831461
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it is a state of matt3r where molecules are very far apart from each øther a.sølid b.liqüid c.gàs d.plasma Jwksjwkajb
Answer:
gas
Explanation:
Solids are compact together, liquida arent compact but are still close, and gases are free roaming and may be very far apart from eachother.
Answer:
The Answer is Gas.
Explanation:
A cube has height of 3cm. What is the volume of the cube?
Answer:
27[tex]cm^{3}[/tex]
Explanation:
The formula to find the volume of a cube is Volume=height cubed(or to the power of 3) so you would replace height with 3cm and get the equation Volume= 3 to the power of 3. So 3 x 3 x 3 = 27. So your answer would be:
27[tex]cm^{3}[/tex]
how does a thermo flask retain heat
Answer:
A thermo flask has a cork which prevents heat loss by conduction.
It also has vacuum which prevents heat loss by convection.
An iron is supplied with a current of 3 A from the mains. The resistance of the iron is 1000
Calculate the power of the iron.
Answer:
1.6 An iron is supplied with a current of 3 A from the mains. The resistance of the iron is 100 Ω. Calculate the power of the iron. [2
Question 19 of 30
A helium balloon's temperature is raised by 1°C. Will this cause its molecules to move faster or slower?
they will move at the same speed
faster
slower
heating of anything increases the kinetic energy of its molecules, so the molecules will move faster.
A helium balloon's temperature is raised by 1°C. This will cause molecules to move faster.
What is the temperature?The temperature has an impact on this average kinetic (motional) energy. Their average kinetic energy likewise rises when gas molecules warm up.
As a result, they travel more quickly and collide more frequently and violently inside the balloon. The temperature has an impact on the hot air balloon's internal pressure. The molecules move more quickly and forcefully against the interior wall of the balloon as they warm up.
A region of the balloon is subjected to more force due to the gas particles' greater velocity, which raises the pressure there.
Therefore, the temperature of a helium balloon is increased by 1°C. Molecules will move more quickly as a result.
To learn more about temperature, refer to the link:
https://brainly.com/question/1457043
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