Answer:
2.4 ohms
Explanation:
From the question,
Applying ohm's law,
V = IR.................... Equation 1
Where V = Voltage of the car battery, I = current, R = resistance
Make R the subject of the equation
R = V/I.................. Equation 2
Given: V = 12 V, I = 5 amp.
Substitute these values into equation 2
R = 12/5
R = 2.4 ohms
The force required to maintain an object at a constant speed in free space is equal to __________
What is happening in this image ?
Answer:
A mirror is scattering light.
Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
Answer:
22.22m/s
Explanation:
The momentum before a collision = momentum after collision so...
work out the momentum of the first object (the bullet)
its p = mv
0.04 kg × 300 m/s = 0.54 kg × v
rearrange this to find v which is 0.04 x 300 = 12
so 12 = 0.54 x v
12/0.5 = v
v = 22.22m/s
hope this helps!
2. You push a 12.3-kg shopping cart with a force of 10.1 N.
(a) What is the acceleration of the cart?
(b) If the cart starts from rest, how far does it move in 2.50 s?
Plz answer quick
Answer:
Explanation:
The important part about this problem is the acceleration, which you must find by using
F = ma,
where F is the force applied,
m is the mass,
and a is the acceleration.
F = ma
10.1 N = (12.3 kg)a
a = 0.8211 m/s^2
Now use the kinematics equations.
d = vot + (1/2)at^2
where d is the distance moved,
vo is the initial velocity (0),
a is the acceleration,
and t is the time.
d = vot + (1/2)at^2
d = (0 m/s)(2.5 s) + (1/2)(0.8211 m/s^2)(2.5 s)^2
d = 2.57 m
a. The acceleration of the cart, is 0.821 [tex]m/s^2[/tex].
b. The car moved a distance of 30.63 meters starting from rest.
Given the following data:
Mass of shopping cart = 12.3 kgForce = 10.1 NInitial velocity, u = 0 m/s (since the cart is starting from rest). Time, t = 2.50 seconds.a. To find the acceleration of the cart, we would apply Newton's Second Law of Motion:
Mathematically, Newton's Second Law of Motion is given by this formula;
[tex]Acceleration = \frac{Force}{Mass}[/tex]
Substituting the given values, we have;
[tex]Acceleration = \frac{10.1}{12.3}[/tex]
Acceleration = 0.821 [tex]m/s^2[/tex]
Therefore, the acceleration of the cart, is 0.821 [tex]m/s^2[/tex].
b. To find the distance covered by the shopping cart, we would use the second equation of motion.
Mathematically, the second equation of motion is given by the formula;
[tex]S = ut + \frac{1}{2} at^2[/tex]
Where:
S is the distance covered. u is the initial velocity. a is the acceleration. t is the time measured in seconds.Substituting the values into the formula, we have;
[tex]S = 0(2.5) + \frac{1}{2} (9.8)(2.5)^2\\\\S = 0 + 4.9(6.25)[/tex]
Distance, S = 30.63 meters.
Therefore, the car moved a distance of 30.63 meters starting from rest.
Read more: https://brainly.com/question/8898885
Plssssss help me no one wants to help me——— power plants use generators to generate electricity for homes and businesses. Some generators work by spinning a coil of wire inside a magnet, as shown in the image. To keep the coil of wire spinning, it’s often attached to a turbine, which is s as n axle with fan blades. Different kinds of power plants use different methods to spin the turbine to make electricity. What’s one way a power plant might spin the turbine?
Answer:
There are a many ways to produce electricity. Electrons can flow between certain different materials providing a current, as in a common battery. While reliable and portable, chemical batteries run down quickly. To provide the large amounts of steady power demanded by modern societies, large power plants have been built. Most power plants make electricity with a machine called a generator.
A 1925 Turbine Rotor
A 1925 turbine rotor for a Westinghouse generator, Image #21.035, Science Service Historical Image Collection, National Museum of American History
Generators have two important parts: the rotor (which rotates) and the stator (which remains stationary). Generators use the principle of electro-magnetic induction, which exploits the relation between magnetism and electricity. In large AC generators, an outer shell with powerful magnets rotates around a stationary "armature" which is wound with heavy wire. As they move, the magnets induce an electric current in the wire.
It is important to recognize that electricity is not mined or harvested, it must be manufactured. And since it's not easily stored in quantity, it must be manufactured at time of demand. Electricity is a form of energy, but not an energy source. Different generating plants harness different energy sources to make electric power. The two most common types are "Thermal Plants" and "Kinetic Plants".
Who is Isaac Newton?
Take the points, Im leaving Brainly..
Answer: English
. mathematician
. physicist
. astronomer
. theologian
. author
Explanation:
Take the points, Im leaving Brainly.. Why?!
[tex]\huge\bf\maltese{\underline{\red{Thanks}}}\maltese[/tex]
What do we call the energy that is transferred to
a substance without the substance's temperature
changing?
Answer:
Latent heat
Latent heat is the heat needed to change a state without a change in temperature.
Explanation:
Hope this helps :D
One of the smallest planes ever flown was the Bumble Bee II, which had a mass of 180 kg. If the pilot’s mass was 70 kg, what was the velocity of both plane and pilot if their momentum was 20,800 kg∙m/s to the west?
Answer:
no one help you this is bad app
caves are formed from?
Answer:
caves are mainly formed by water or in some other cases limestone.
Z. solid
Y molten
X. solid and liquid
W. solid, rocky
What is the name of the layer of the Earth that is labeled with the letter X?
OA
mantle
ОВ.
outer core
OC. inner core
OD. Crust
Answer:
mantle
Explanation:
The mantle has properties of solids only.
HELP PLEASE!!! I HAVE TO GET THIS IN QUICK!!
How to calculate the period of a wave?
Answer:
The wave velocity and the wavelength are related to the wave's frequency and period by vw=λT or vw=fλ. The time for one complete wave cycle is the period T. The number of waves per unit time is the frequency ƒ. The wave frequency and the period are inversely related to one another.
Explanation:
T = 1 / f is the formula to calculate the period of a wave.
What is the period of the wave?The time it takes for two successive crests (one wavelength) to pass a specified point. The wave period is often referenced in seconds.
The calculation of period of wave is:
The formula for period is T = 1 / f ,
where "T" is period – the time it takes for one cycle to complete, and "f" is frequency.
To get period from frequency, first convert frequency from Hertz to 1/s.
Period refers to the time for something to happen and is measured in seconds/cycle.
In this case, there are 11 seconds per 33 vibrational cycles.
Thus the period is (11 s) / (33 cycles) = 0.33 seconds.
Therefore,
T = 1 / f is the formula to calculate the period of a wave.
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Can someone help me please
Metalloids
Metalloids have properties that are intermediate between metals and non-metals. They have properties that are difficult to characterize.
Physical Properties of Metalloids
State of matter - Solid
Lustre - Metallic lustre
Elasticity - Brittle
Conductivity - Semi-conductive in nature
Chemical Properties of Metalloids
Oxidation - They are capable of forming glasses.
Alloys - When mixed with metals, they form alloys.
Allotropic - Metallic and non-metallic allotropes are formed.
Melting - Few metalloids contract when they are melted.
Compounds - Compounds are formed when they react with halogens.
Common Properties of Metalloids
Metalloids are good semiconductors. The reactivity of metalloids is dependent on the properties of the elements they are reacting with. Electronegativity and ionization energy are between metals and non-metals.Non-Metals
Non-metals are those which lack all the metallic attributes. They are good insulators of heat and electricity. They are mostly gases and sometimes liquid. Some they are even solid at room temperatures like Carbon, sulphur and phosphorus.
Properties of Non metals
Characteristic properties of non-metals are high ionization energies and high electronegativity. Owing to these properties, non-metals usually gain electrons when reacting with other compounds, forming covalent bonds. Among the non-metals, the anionic dopants have a strong influence on the VB. Non-Metal dopants are carbon, nitrogen, fluorine, sulphur and iodine.
General properties of non-metals.
The atoms of non-metals tend to be smaller than those of metals. Several of the other properties of non-metals result from their atomic sizes. Non-metals exhibit very low electrical conductivities. The low or non-existent electrical conductivity is the most important property that distinguishes non-metals from metals. Non-metals have high electronegativities. This means that the atoms of non-metals have a strong tendency to attract more electrons than what they would normally have. Non-metals have high electronegativities. This means that the atoms of non-metals have a strong tendency to hold on to the electrons that already have. In contrast, metals rather easily give up one or more electrons to non-metals, metal therefore easily form positively charged ions, and metals readily conduct electricity. Under normal conditions of temperature and pressure, some non-metals are found as gases, some found as solids and one is found as liquid. In contrast, except mercury, all metals are solids at room temperature. The fact that so many non-metals exist as liquids or gases means that non-metals generally have relatively low melting and boiling points under normal atmospheric conditions. In their solid-state, non-metals tend to be brittle. Therefore, they lack the malleability and ductility exhibited by metals.Physical Properties of Non-Metals
Ductility is the property of the material to be stretched into wires but non-metals are not ductile except for carbon, as carbon fibres find uses in a wide variety of industries including sports and music equipment. Another property characteristic to metals is absent in non-metals called malleability. They can’t be drawn into sheets as they are brittle and break on applying pressure. They are not lustrous as they do not have any shiny appearance. They are not sonorous and do not produce a deep ringing sound when they are hit with another material. They are also bad conductors of heat and electricity except for graphite.3) Magnets are used to separate steel cans from aluminum cans in recycling plants. How can
they be used for this?
(Will give brainliest if it's a proper answer)
Answer:
Since steel contains iron (a magnetic metal), the magnets will attract the steel cans since aluminum is not magnetic. This is used to separate the steel cans from the aluminum cans so they can be recycled separately.
An Led Light bulb is rated 14 W. How much energy will the light bulb consume if it is on for 1 hour (3600 seconds)
Answer:
18kW
Explanation:
very LED bulb has a power rating in terms of Watt-hour. It gives the power consumption per hour. For e.g. a 100W light bulb consumes 100W of electricity per hour. If left 'on' for 10 hours, a 100W light bulb costs 1kW and 1 unit of electricity is burned. Because 1 unit = 1 Kw of electricity.
I calculated my electricity consumption in 1 hour with LED Bulb as follows-
LED Bulbs power rating- 15 watt
quantity- 1
No. of hours a day – 12
Wattage in 1 hour – 12(time) x 15(load) x 1(quantity) = 180W = .18kW
So consumption units of power with a LED Bulb consume in 1 hour= .18 Units (because 1 KW = 1 unit)
Please help me please and you will get the brainlist
Answer:
4. Force = 178.6 Newton.
5. Acceleration = 2.28 m/s².
6. Force = 178.6 Newton.
Explanation:
4. Given the following data;
Acceleration = 3.8 m/s²
Mass = 47kg
Force = mass * acceleration
Force = 47 * 3.8
Force = 178.6 Newton.
5. Given the following data;
Force = 785N
Mass = 345kg
Acceleration = force/mass
Acceleration = 785/345
Acceleration = 2.28 m/s²
6. Given the following data;
Acceleration = 6m/s²
Force = 32N
Mass =force/acceleration
Mass = 32/6
Mass = 5.33 kilograms
A physics teacher is reheating her leftover pizza lunch in the very old teacher breakroom microwave. The microwave is so old that it doesn't even turn the food as it cooks. When the teacher takes her food out and eats it, she discovers that parts of the pizza are scalding hot, while other parts are still very cold. She explains to the students that a microwave works by producing standing waves that result in heating. She asks the students to explain why some parts of the pizza are hot while others are still cold. Below are their responses:
Answer: At the antinodes of a standing wave, the wave is shaking very rapidly, causing those parts of the pizza to get hot. At the nodes, the wave is not shaking much at all, causing those parts of the pizza to stay cold."
Explanation:
antinodes vibrate and are the opposite of nodes which are stationary.
Some parts of the pizza are hot while others are still cold. Because the antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear.
What are the differences between nodes and antinodes?The fact that there are locations along the medium that appear to be standing still is a feature of every standing wave pattern.
The term "node" refers to these sites, which are also known as "points of no displacement." Other sites along the medium are subjected to vibrations with substantial positive and negative displacements.
During each vibrational cycle of the standing wave, these are the locations that experience the most displacement. These points are termed "antinodes" because they are the polar opposites of nodes.
The antinodes of a standing wave shake very quickly, causing the hot spots on the pizza to appear. The wave isn't moving very much at the nodes, therefore those areas of the pizza stay cold."
Hence some parts of the pizza are hot while others are still cold.
To learn more about antinodes refer to the link;
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Series Circuits and Parallel Circuits
How similar?
How different?
Answer:
series circuits have a line of several electrical patterns parallel curcuits are seperated
Explanation:
hope this helps..
How long would it take for a car to travel 500m if it was moving at a constant speed of 50.0 km/h?
a student is supplied with the following pieces of equipment:
• a small metal ball
• table tennis ball
• metre rule
• stop clock
• calculator
• light gate
• data logger
describe how the student can use this, or other additional equipment, to determine an accurate value for the acceleration of free fall (g). the student need not use all the equipment. show clearly what measurements should be taken and how the students should use these in determining (g). describe one source of error and how this might affect the value of (g).
(6 marks/year9/gcse)
Explanation:
Use a meter stick, small metal ball, stopwatch, calculator.
Have the students mark off a vetrtical distance from which to drop the metal ball. Ready the stopwatch, and start when the object is dropped and stop when the object contact the ground. Repeat 5 times and average the stopwatch times.
Now, use the formula d=vo+(1/2)at^2
There's no initial velocity, so d=(1/2)at^2
We know time and distance, so we can solve for a, acceleration.
2d=at^2
(2d)/(t^2)=a
Now, input the numbers gathered in the experiment in meters and seconds.
One source of error is human error (stopwatch timing)
Air resistance (although pretty negligible)
Look at the diagram B. What is happening in diagram B ?
Answer:
a lens is scattering light
Explanation:
Diagram B shows a plano concave lens. Plano-Concave lenses bend parallel input rays to diverge from one another on the output side of the lens and hence have a negative focal length.
In the given figure, a Plano concave lens is shown. It scatters light. The image is formed in front of lens. The formed image is virtual.
Hence, the correct option is (c) "a lens is scattering light".
What is the average velocity of atoms in 1.00 mol of neon (a monatomic gas) at 2°C? For m, use 0.0202 kg.
Answer:The average Velocity of the atoms =582.73m/s
Explanation:
Given
Mole of neon gas = 1.00 mol
Temperature = 2°C changing to Kelvin becomes
2°C + 273.15 = 275.15K
Mass = 0.0202 kg
Using the equation that connects the Average kinetic energy with ideal gas equation we have that
Kinetic energy=3/2 nRt
1/2(mv^2) = 3/2 nRt
Where
M = mass,
V = volume.
R = gas constant(8.31 jK-1 mol-1,
t = temperature in Kelvin,
n = number of moles
Putting our known values, we have that
1/2(0.0202 × v^2) = 3/2 (1 × 8.31 × 275.15)
0.0101 v^2 = 3,429.745
v^2 = 3429.745 / 0.0101
v^2 = 339,578.713
v = √339578.713
v = 582.73m/s
can somebody definee newton1 word to word pls
Answer:
One newton is a unit of force equal to the force needed to move a one kilogram mass by one meter per second per second. Word originsThis word is named for Sir Isaac Newton (1642-1727), the great English mathematician and physicist who discovered gravity.
Explanation:
hope this help you
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A book that weighs 0.35 kilograms is kept on a shelf that’s 2.0 meters above the ground. A picture frame that weighs 0.5 kilograms will have the same gravitational potential energy as the book when it’s raised to a height of ____
meters.
(Use PE = m × g × h, where g = 9.8 N/kg. )
Answer:
E p = m · g · h
E p ( book ) = 0.35 kg · 9.8 m/s² · 2 m = 6.86 J
E p ( picture frame ) = 6.86 J
( same gravitational potential energy as the book )
6.86 = 0.5 · 9.8 · h
6.86 = 4.9 h
h = 6.86 : 4.9
h = 1.4 m
Answer: 1.4 M
The increasing speed of a falling object is caused by
gravity
force
mass
speed
(pick one)
Answer:
gravity
Explanation:
Technically it would be mass or speed because it depends on ow big or small it is, but if you break it down it will be due to gravity as it gets stronger
What is the smallest particle of an element that still retains of that element
A.compound
B.molecule
C.atom
D.mixture
Answer:
atom
Explanation:
the first guy who gave link this is for you:
we cannot use links in brainly
Thankyou.
Which of these waves probably has the largest wavelength?
Answer:
I think it's the last one
Explanation:
good luck
Answer: The last one...8 waves per second
Explanation:
resistors - defibrillator - resistance - increases - energy - decreases -capacitors.
1_______________ is the difficulty of passing electric current through a conductor. It 2_______________ as the wire becomes longer and 3_________________ as the wire becomes wider.
4________________ are electric devices used to transform energy into heat or light.
5________________ are similar to batteries. They can store 6_______________. But they charge up quicker and can discharge the all the energy faster than a second. A 7_________________ is an example of a capacitor function.
Answer:
1. Resistance.
2. Decreases.
3. Increases.
4. Defibrillator.
5. Capacitors.
6. Energy.
7. Resistor.
Explanation:
Resistance is the difficulty of passing electric current through a conductor. It increases as the wire becomes longer and decreases as the wire becomes wider.
Defibrillator are electric devices used to transform energy into heat or light.
Capacitors are similar to batteries. They can store energy. But they charge up quicker and can discharge all the the energy faster than a second. A resistor is an example of a capacitor function.
An object is hit with a force of 25 N and accelerates at a rate of 10 m/s/s. What is the mass of the object?
Answer:
2.5 kg
Explanation:
mass is force divided by acceleration25÷10You drive home from school steadily at 90 km/hr for 145 km.
How long did it take you to get home?
Answer:
90km/hr I think but if it is wrong than sorry