Answer:it the letter b I was just finished with this test
Explanation:
Use the information and diagram to answer the following question.
A Physics student builds a circuit as shown with the help of a battery, wires, switch and 2 light bulbs as shown.
Which of the following circuit elements should the student use to cause the bulbs to dim but not go out?
Answer:b
Explanation:
Because I don’t know
The circuit elements should be placed according to the diagram given in option B to cause the bulbs to dim but not to go out. Thus, the correct option is B.
What are the elements of an electric circuit?An electric circuit is the continuous closed path along which the electric current flows from the positive terminal of the circuit to the negative terminal of the battery. An electric circuit can be constructed easily by joining all the elements of the circuit together in order.
The components of an electric circuit are:
A cell or a battery, which is the source of electricity.
The connecting wires which act as conductor to flow electric current.
A key or a switch to control the current through the circuit.
A bulb or electric device which act as a load to the circuit.
The length of the electric wire increases the resistance through the circuit and decreases the current flowing through the circuit which in turn dims the bulb.
Therefore, the correct option is B.
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The different shapes of the moon seen from Earth are called
Answer:
they are called phases of the moon.
The different shapes of the moon seen from Earth are called phases of moon
What is phases of moon ?The portion of the moon that we can see from the earth on any given night is called phases of moon . There are four phases of moon 1) new moon 2) first quarter 3) full moon 4) third quarter
The earth rotates around the sun and the moon rotates around the earth . so , now we know that moon is in between sun and earth , due to this orbiting the sunlight falls on moon and we see moon in the light of sun as we know moon does not have its own light . Because of this rotation sunlight fall at different angles because position of moon with respect to earth is changing constantly due to which different shapes has been observed from the earth's surface ,after being reflected that light reaches the earth and being observed by the observer on earth as moon having different shapes called its phases of moon.
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Energy in an ecosystem's energy pyramid always flows from __________.
A. decomposers to producers
B. producers to consumers
C. consumers to producers
D. decomposers to consumers
The Answer is B because primary consumers need to get their food from plants.
Answer:
The Answer is B because primary consumers need to get their food from plants
Explanation:
A hiker has determined which hiking path to take through a national forest (A is the starting point and B is the final destination). Below is the map of that trail. What does the red line most likely represent?
Total displacement from A to B
Total distance of the path from A to B
Both Total displacement and distance of path from A to B
The shortest path between A and B
In the following equation, Vi represents initial velocity and Vf represents final velocity. The equation for average acceleration is a = (Vf - Vi)/t. Solve this formula for t.
t = a/(Vf - Vi)
t = (Vf - Vi)/a
t = a(Vf - Vi)
t = (Vf - Vi)a
Select the 2 equations that show the same correct relationship between Average Velocity, Distance, and Time.
d = vt
t = v/d
v = t/d
v = d/t
NEED HELP ASAP PLEASE HELP
Can someone answer these questions? Im really sorry for the long 15 questions but it would save me and basically my whole class.
Answer:
yes
Explanation:
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Essential Question: How do different forces affect our daily experience? Think about us walking, gravity, etc.
Answer:
dd
Explanation:
I dont know I dont know I dont know I dont know
7. Roughly how much did the cost of PV solar panels decrease between 2008 and 2015?
40%
80%
60%
20%
US 0
pennies used to be called coppers. how do you suppose they got this nickname?
Answer:
because pennies are made from copper
Explanation:
4.Your friend tells you the weight of aparticular sample of chalk is 17.85 grams. Is there anything wrong with your friend ’statement?
A. No, because grams are the right units for weight.
B. No, because mass and weight are really the same thing.
C.Yes, because your friend should have reported the mass in kilograms.
D. Yes, because mass and weight are measured in different units
Answer:
A i tooook theee quizzz too
4. An egg is thrown horizontally off the roof that is 60 meters high, with an initial velocity of
6.5m/s. How long does it take to hit the ground? How far does it go in the x direction?
Answer:
It will take 3.5s to reach the ground
Explanation:
A toy remote car drives in a circle. It makes 2 revolutions in 20 seconds. What is the period of the object?
Answer:
T = 10 seconds
Explanation:
Given that,
A remote car makes 2 revolutions in 20 seconds.
We need to find the period of the object.
It means, it will make [tex]\dfrac{2}{20}=0.1\ \text{revolutions/second}[/tex] .
lt T be the period of the object. So,
[tex]T=\dfrac{1}{0.1}\\\\T=10\ s[/tex]
It will take 10 seconds for one revolution.
If a machine exerts a force of 250N on an object and no work is done, what must have occurred?
what is aerobic activities
Answer:
Aerobic exercise is any type of cardiovascular conditioning. It can include activities like brisk walking, swimming, running, or cycling. You probably know it as “cardio.”
By definition, aerobic exercise means “with oxygen.” Your breathing and heart rate will increase during aerobic activities. Aerobic exercise helps keep your heart, lungs, and circulatory system healthy.
Aerobic exercise differs from anaerobic exercise. Anaerobic exercises, such as weightlifting or sprinting, involve quick bursts of energy. They’re performed at maximum effort for a short time. This is unlike aerobic exercises. You perform aerobic exercises for a sustained period of time.
Explanation:
Aerobic exercise is physical exercise of low to high intensity that depends primarily on the aerobic energy-generating process. "Aerobic" is defined as "relating to, involving, or requiring free oxygen", and refers to the use of oxygen to adequately meet energy demands during exercise via aerobic metabolism
5. There is a bell at the top of a tower that is 45 m high. The bell's mass is 200 kg. The bell has energy. Calculate it.
45000
900000 J
9000 J
88200 J
Answer:
Explanation:
Since the bell is at rest in an elevated position, we can assume that it only has potential energy.
U=mgh is the formula for potential energy where U=potential energy, m= mass, g=acceleration due to gravity, and h=height.
Plug in known variables....
U=200kg*9.8m/s^2*45m
U=88200 joules of potential energy or letter D.
Select the correct answer from each drop-down menu.
Heat always flows from a
place to a
place.
Heat always flows through from a higher thermodynamic potential to lower thermodynamic potential.
What is thermodynamics?It can be defined as the branch of science that deals with the interactions of thermal energy across different system and their surroundings.Thermodynamics does not deal with the rate of energy interaction.The movement of the thermal energy depends on the thermodynamic potential of the respective objects or bodies in which the flow of the thermal energy is involved.
The thermodynamics potential is analogous to the electrical potential what is used to flow the current in the electrical circuit in the similar fashion the temperature gradient is the driving force that is used for the transfer of heat energy from a higher temperature potential to the lower to a temperature potential.
This natural flow of heat is valid only when any external work is not done on the thermodynamic system where transfer of heat taking place .
This principle of heat transfer is not applicable in the case of refrigerator and air-conditioner because in that case some external work is done on the system and is the natural driving force of heat transfer.
Hence,we can say that heat always flows through from a higher thermodynamic potential to lower thermodynamic potential unless until some external prime mover is provided for example in case of air conditioner.
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Calculate the volume of this regular solid.
A cone 4.5 centimeters high with a radius of 3 centimeters. Label B is pointing to the circular base of the cone.
What is the volume of the cone?
Use the button on your calculator to complete this problem.
Round at the end to the nearest hundredth.
Answer:
42.41
Explanation:
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
Answer:r other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by
Explanation:
Activity: Is it the same?!
Reflection of light (and other forms of electromagnetic radiation) occurs when the waves encounter a surface or other boundary that does not absorb the energy of the radiation and bounces the waves away from the surface. The simplest example of visible light reflection is the surface of a smooth pool of water, where incident light is reflected in an orderly manner to produce a clear image of the scenery surrounding the pool. Throw a rock into the pool (see Figure 1), and the water is perturbed to form waves, which disrupt the reflection by scattering the reflected light rays in all directions.
Some of the earliest accounts of light reflection originate from the ancient Greek mathematician Euclid, who conducted a series of experiments around 300 BC, and appears to have had a good understanding of how light is reflected. However, it wasn't until a millennium and a half later that the Arab scientist Alhazen proposed a law describing exactly what happens to a light ray when it strikes a smooth surface and then bounces off into space.
In this activity you will be working as an engineer that is working to modify different kinds of digital cameras and to study the effect of changing incident angle on the reflected angle.
Method
Explain the steps of your experiment and identify the scientific variables:
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
• Independent Variable
----------------------------------------------------------------------------------------------------------------
• Dependent Variable
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
if anyone does ib myp 3. pleaseeee helppp im gonnnnaaa fail.
sciences by concept myp 3 formative assesment.
im giving 50 points please just help meeeeeeeeeeee
Hey can someone please help answer this question?
A child rides near the edge of a merry-go-round that rotates on a frictionless axis. If the child walks
toward the center of the merry-go-round, will the angular momentum change if a) the child is the
system? b) the system is the child-merry-go-round
Wouldn’t the two be the same? Because it is simply speaking about the child’s angular momentum?
Answer:
yes ............................................ks
Explanation: is good
PLEASE HELP !!
Elements in period 2 on the periodic table all have blank
electron shells.
Answer:
Two orbitals for their electrons and six in the 2p subshell
Explanation:
Hope this helps :)
Why is an electromagnet used instead of a permanent magnet in magnetic cranes?
Answer:
an electromagnet is a metal which has the ability to turn into a magnet on passing electricity through it .
But once the electric flow is withdrawn the circuit breaks and it no more behaves like a magnet.
but this is not so in permanent magnets
Explanation:
thus electromagnet is used in magnetic cranes bcoz their magnetism can be controlled conveniently.
A skier, starting from rest, slides down an icy frictionless 80o incline whose vertical height is 105 m. How fast are they going when the reach the bottom?
Answer:
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2. A compressed gas is held inside a canister with a moveable lid. The temperature of the gas is significantly
higher than the air temperature outside the canister. When weight is removed from the lid, the gas
expands to lift it. For this expansion to be as nearly adiabatic as possible, which condition should be met?
Answer:
Heat supplied should be equal to zero.
Explanation:
Given that a compressed gas is held inside a canister with a moveable lid. The temperature of the gas is significantly higher than the air temperature outside the canister. When weight is removed from the lid, the gas
expands to lift it.
For this expansion to be as nearly adiabatic as possible, one of the conditions that should be met is that there should be no supply of thermal or heat energy to the system.
According to first law of thermodynamics:
Change in internal energy = heat supply + work done by the system
If heat supplied = 0
Then, nothing is constant.
The internal energy = work done by the system.
Therefore, no heat should be supplied to the system.
If the speed of sound in air is 340 m/s, approximately how long will it take the sound of a clap of thunder to travel 2 kilometers?(1 point)
5.9 seconds
3.4 seconds
2.9 seconds
1.7 seconds
Answer:5.9 Seconds
Explanation: I just took the quiz
The sound of a clap of thunder take 5.9 seconds to travel 2 kilometers.
To determine the correct statement among all the options, we need to know about the relation between speed and time.
What is sound speed?The speed of sound is the distance travelled by sound per unit time Mathematically, it is v=distance/time= 340m/s.What's is the time taken by sound to travel 2 km?We found 340m/s=distance/time. So, time = distance/340= 2000m/340= 5.9 s.Thus, we can conclude that the sound of a clap of thunder take 5.9 seconds to travel 2 kilometers.
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A disc whose moment of inertia is 1kgm² is rotating at 100 rad/sec. This disc is pressed against a similar disc that is able to rotate freely but is initially at rest. The two disc together and rotate as a unit. Determine the final angular velocity of the system.
it may help you have a great day
A skier skies down a slope with an average speed of 50 km/s. How far does the skier travel in 5 minutes?
Answer:
15000000 m
Explanation:
From the question,
Speed (S) = Distance(d)/Time(t)
S = d/t....................... Equation 1
Make d the subject of the equation
d = St..................... Equation 2
Given: S = 50 km/s = 50000 m/s, t = 5 minutes = 5*60 seconds = 300 seconds
Substitute these values into equation 2
d = 50000(300)
d = 15000000 m
Hence the skier travels 15000000 m
Molly is pulling a cart down the hallway. She stops at each classroom and collects a stack of books from each teacher. After stopping at 5 classrooms, she can no longer move the cart by herself and her friend Regan needs to help her pull the cart. How does this SHOW Newton's 3rd Law? Do NOT just state the law!!
Answer:
His third law states that for every action or force in nature there is an equal and opposite reaction.
Explanation:
The heavier the books get, the harder it is for Molly to exert enough force to move the cart.
I hope this helps!!!!!! Please mark me brainliest!!
What does this same experiment tell you about light waves? Explain the evidence that supports your claim.
Answer:
Light wave is an EM wave that can only be seen by humans New questions in Physics Engineers at the Space Centre must determine the net force needed for a rockets engine to achieve an acceleration of 70 m/s2.
Explanation:
If one soccer ball is rolling to the right at 3 m/s and another soccer ball is rolling left with a speed of 5 m/s, how much momentum is there in this system before they collide with each other? Both have a mass of 1 KG
Answer:
Final momentum after a head on collision is -2kgm/
Explanation:
One ball moves to the right and the other moves opposite and momentum is a vector quantity so that considering the direction
Initial momenta are P₁=2x3=6kgm/s P₂=4x(-2)=-8kgm/s
Final momentum is the vector sum of P(final)= 6-8= -2 kgm/s
what happens as photons of visible light are absorbed by dye molecules?
What happens to the current in the other two lamps
if one lamp in a three-lamp parallel circuit burns out?
Answer:
If one of the filaments burns out, the resistance and the potential difference across the other lamps will not change; therefore, their currents will remain the same.
Explanation:
Answer:
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