Answer:
10,000kgm/s
Explanation:
Since we not told what to look for, we can as well find the momentum of the car.
momentum = mas * velocity
Given
Mass of the car = 2000kg
velocity = 5m/s
Substitute into the formula
Momentum = 2000 * 5
Momentum = 10000kgm/s
Hence the momentum of the car is 10,000kgm/s
A converging lens forms an image at 43 cm. A 9 cm tall object is placed in front of the lens at a distance of 90 cm.
Determine the magnifying power of the lens
Sound waves travel through steel railroad rails a distance of 2350 m in 0.383 s. What is the speed of sound in the rails?
(units = m/s)
Answer:
Speed of sound ways in railroad = 6,135.8 m/s
Explanation:
Given:
Distance cover by sound wave = 2,350 meter
Time taken by sound wave to cover distance = 0.383 seconds
Find:
Speed of sound ways in railroad
Computation:
Speed = Distance / Time
Speed of sound ways in railroad = Distance cover by sound wave / Time taken by sound wave to cover distance
Speed of sound ways in railroad = 2,350 / 0.383
Speed of sound ways in railroad = 6,135.77
Speed of sound ways in railroad = 6,135.8 m/s
what is the second and third law of newton? asap
Answer:
In the second law, the force on an object is equal to its mass times its acceleration. I hope this helped!
Explanation:
If you weigh 882 N on EARTH (HINT: What number do we ALWAYS use for gravity on Earth), what is your mass?
The higher the frequency the higher the pitch or tone of the sound.
Answer: The word that musicians use for frequency is pitch. The shorter the wavelength, the higher the frequency, and the higher the pitch, of the sound. In other words, short waves sound high; long waves sound low. Instead of measuring frequencies, musicians name the pitches that they use most often.
Explanation: The frequency of a sound wave is the number of vibrations that occur per second. The pitch of a sound is a description of how high or low the sound seems to a person. The pitch a person hears depends on the frequency of the sound wave.
contrast your Reflection from the back of a shiny spoon and from a plane mirror.
What is responsible for the distribution of charge in conductors and insulators?
A
proton movement
B
number of protons
С
electron movement
D
number of electrons
Answer:
C
electron movement
Explanation:
The electron is a subatomic particle, symbol
e−
or
β−
, whose electric charge is negative one elementary charge.[9] Electrons belong to the first generation of the lepton particle family,[10] and are generally thought to be elementary particles because they have no known components or substructure.[1] The electron has a mass that is approximately 1/1836 that of the proton.[11] Quantum mechanical properties of the electron include an intrinsic angular momentum (spin) of a half-integer value, expressed in units of the reduced Planck constant, ħ. Being fermions, no two electrons can occupy the same quantum state, in accordance with the Pauli exclusion principle.[10] Like all elementary particles, electrons exhibit properties of both particles and waves: they can collide with other particles and can be diffracted like light. The wave properties of electrons are easier to observe with experiments than those of other particles like neutrons and protons because electrons have a lower mass and hence a longer de Broglie wavelength for a given energy.
Electrons play an essential role in numerous physical phenomena, such as electricity, magnetism, chemistry and thermal conductivity, and they also participate in gravitational, electromagnetic and weak interactions.[12] Since an electron has charge, it has a surrounding electric field, and if that electron is moving relative to an observer, said observer will observe it to generate a magnetic field. Electromagnetic fields produced from other sources will affect the motion of an electron according to the Lorentz force law. Electrons radiate or absorb energy in the form of photons when they are accelerated. Laboratory instruments are capable of trapping individual electrons as well as electron plasma by the use of electromagnetic fields. Special telescopes can detect electron plasma in outer space. Electrons are involved in many applications such as electronics, welding, cathode ray tubes, electron microscopes, radiation therapy, lasers, gaseous ionization detectors and particle accelerators.
Interactions involving electrons with other subatomic particles are of interest in fields such as chemistry and nuclear physics. The Coulomb force interaction between the positive protons within atomic nuclei and the negative electrons without, allows the composition of the two known as atoms. Ionization or differences in the proportions of negative electrons versus positive nuclei changes the binding energy of an atomic system. The exchange or sharing of the electrons between two or more atoms is the main cause of chemical bonding.[13] In 1838, British natural philosopher Richard Laming first hypothesized the concept of an indivisible quantity of electric charge to explain the chemical properties of atoms.[3] Irish physicist George Johnstone Stoney named this charge 'electron' in 1891, and J. J. Thomson and his team of British physicists identified it as a particle in 1897 during the cathode ray tube experiment.[5] Electrons can also participate in nuclear reactions, such as nucleosynthesis in stars, where they are known as beta particles. Electrons can be created through beta decay of radioactive isotopes and in high-energy collisions, for instance when cosmic rays enter the atmosphere. The antiparticle of the electron is called the positron; it is identical to the electron except that it carries electrical charge of the opposite sign. When an electron collides with a positron, both particles can be annihilated, producing gamma ray photons.
What would happen if there were no soundboxes (resonances) in musical instruments?
¿Qué pasa cuando se presenta el movimiento de un cuerpo y este no varía su velocidad?
Answer:
The way the body resist it's state in motion is called inertia. Its directly proportional to it's mass.
Explanation: This is what we call Newton's First Law and "State Of Motion".
The speed limit on many roads in a town 13.5 m/s outside schools this is limit is often reduced by one third
calculate the reduced speed limit
Answer:
9 m/s
Explanation:
13.5 × [tex]\frac{2}{3}[/tex] = 9
A student charges a balloon and then brings it near a metal sphere hanging from the
ceiling. She brings it near the sphere, but does not touch. The sphere moves toward
the balloon. What are the charges on the balloon and the metal sphere?
a) The balloon has a positive charge and the metal sphere has a negative charge.
b) The balloon has a negative charge and the metal sphere has a positive charge.
c) Both are negatively charged.
d) Both are positively charged.
Answer:
B
Explanation:
the balloon has a negative charge and the metal sphere has a positive charge
Answer: B
Explanation:
The balloon will pick up stray electrons, so it will become negatively charged. Since it is attracted to the metal sphere, the sphere must be positively charged.
Un trozo de hielo de 70 g se introduce en 450 g de agua a 23 ºC. ¿Cuál es la temperatura final de equilibrio suponiendo que no hay intercambio de calor entre el sistema y el ambiente?
Answer:
the answer is 250
Explanation: took the test
ngle of a block is 45 degrees. What is the refractive index
Sound travels at different speeds in different mediums. Rank the three mediums sound can travel to from fastest to slowest.
Answer:
Sound travels at different speeds depending on what it is traveling through. Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids.
Sound waves fall into three categories: longitudinal waves, mechanical waves, and pressure waves.
The electric potential at a point in space is -890 V. If a 0.0285 C charge is placed there, what will its potential energy U be? Include the sign, + or - (Unit = J)
Answer: -25.4
Explanation:
Acellus don’t forget the negative sign
Answer:
-25.4
Explanation:
Acellus
Give the man above me brainliest!
At 0 degrees Celsius, water _____ ?
A. boils
B. freezes
C. evaporates
Answer: Water will. (A) freeze.
Explanation: 0 degrees Celsius is cold so the water will turn into a solid and therefore freeze.
which of the following best defines unbalanced forces? A. Forces that act in opposite directions and cancel each other out B. Unequal forces that do not cancel out but cause a change in motion c. Foroes between two objects in physical contact D. The total force on an object after individual forces are added togethe
Answer:
Neseciti puntos oara mi tarea y mad ni entiendo lo wue dices
What happens to the particles in water as the water is heated and turns to vapor? (2 points)
Answer:
The particles will more likely to move faster since they are converted from a liquid to gas.
Rules for States of Matter:
1. Solid particles always are packed close together and don't have much space to move.
2. Liquid particles have space to move around but are still packed together, but not as close as solid.
3. Gas particles are moving freely, in fact they are in the air! Gas particles are free to move wherever. For example, the air has gas particles that are constantly bumping into each other.
Let me know if I am right =)
how is enormous energy produced in sun?write with chical equation.
Answer
This is done by Nuclear Fusion.
Light nuclei like Hydrogen(Deuterium) combine to produce new Elements like Helium.
²H + ²H === ⁴He + ENERGY
The subscripts of the Hydrogen atoms are 1
While that of Helium is 2. My Keyboard couldn't type those
which planet has the closest gravity to Earth?
hii! help asap. i’ll give brainliest thanks!
what current is taken by the lamp when it is connected to a 220 v mains supply? what is the resistance of the lamp
what is the resistance of the lamp
Answer:
Given parameters
Potential difference (V) = 220 V
Power of lamp 1 (P1) = 100 W
Power of lamp 2 (P2) = 60 W
Both the bulbs are connected in parallel. Therefore, the potential difference across each of them will be 220 V, because no division of voltage occurs in a parallel circuit.
We know that
Power = Voltage x Current
P = V x I
I = P/V
Lamp 1:
I1 = P1/V
I1 = 100/220
I1 = 5/11 A
Lamp 2:
I2 = P2/V
I2 = 60/220
I2 = 3/11 A
Net current (I) = I1 + I2
I = 5/11 + 3/11
I = 8/11
I = 0.7273 A
Hence, current drawn from the line is 0.727 A
Explanation:
Hope this helps!
Determinar la fuerza electrostática que ejerce una carga de 1μC sobre otra de 2.9μC cuando están separadas por una distancia de 10 cm. *
Answer:
La fuerza electrostática es 2.61 N.
Explanation:
La fuerza electromagnética es la interacción que se da entre cuerpos o partículas que poseen carga eléctrica.
La ley de Coulomb se emplea para calcular la fuerza eléctrica que actúa entre dos cargas en reposo y dice que la magnitud de cada una de las fuerzas eléctricas con que interactúan dos cargas puntuales, es directamente proporcional al producto de las cargas e inversamente proporcional al cuadrado de la distancia que las separa. Matemáticamente se expresa como:
[tex]F=k*\frac{q1*q2}{r^{2} }[/tex]
donde:
F = fuerza eléctrica de atracción o repulsión en Newtons (N). Las cargas iguales se repelen y las cargas opuestas se atraen. k = es la constante de Coulomb o constante eléctrica de proporcionalidad. En este caso su valor es:9*10⁹ [tex]\frac{N*m^{2} }{C^{2} }[/tex] q1, q2 = valor de las cargas eléctricas medidas en Coulomb (C). r = distancia que separa a las cargas y que es medida en metros (m).Siendo en este caso:
q1= 1 μC= 1.10⁻⁶ Cq2= 2.9 μC= 2.9*10⁻⁶ Cr= 10 cm= 0.1 mReemplazando:
[tex]F=9*10^{9} \frac{N*m^{2} }{C^{2} }*\frac{1*10^{-6}C *2.9*10^{-6}C}{(0.1 m)^{2} }[/tex]
Resolviendo:
[tex]F=9*10^{9} \frac{N*m^{2} }{C^{2} }*\frac{2.9*10^{-12}C^{2} }{0.01 m^{2} }[/tex]
F= 2.61 N
La fuerza electrostática es 2.61 N.
The graph shows the solubility of several different compounds in water. According to the graph, which compound can form a saturated solution when 160g is dissolved at a temperature of 55°C?
A. NaClO3
B. KBr
C. KNO3
D. NaCl
THIS IS MY EXAM HURRY PLS
Which is a way that the elements are grouped on the periodic table? (2 points) a Elements in the same row have the same number of protons. b Elements with similar bonding properties are in the same column. c Elements in the same column have the same number of neutrons. d Elements with similar mass are placed in the same column.
Answer:
elements in the same column have the same number of neutrons. elements with similar mass are placed in the same column.
11. 2 cm of rain falls in 10 minutes. The rain fall
steady at the rate of 20 m/s. The average
pressure on ground if rain drops comes to rest
after impact is
(a) 0.067 N/m^2
(b) 0.67 N/m^2
(c) 6.7 N/m^2
(d) 67 N/m^2
Answer:
WP LA æ WI all all Eduardo whatever Cincinnati quips I was just wondering if you want to be a good day
To celebrate her upcoming graduation Keysi books a trip on a space party-boat that travels at 99% the speed of light. She tells her mom she'll be "right back" and goes for a 3 day trip around the solar system. If the clocks on her space ship read 3 days, how many days does her mom wait for her to return? *
5 days
9 days
12 days
15 days
21 days
25 days
What are tides? the regular daily rises and falls in sea level caused by the gravitational attraction of the Moon and Sun on Earth the regular weekly rises and falls in sea level caused by the gravitational attraction of the Moon on Earth the regular weekly rises and falls in sea level caused by the gravitational attraction of the Moon and Sun on Earth the regular daily rises and falls in sea level caused by the gravitational attraction of the Moon on Earth the regular daily rises and falls in sea level caused by the gravitational attraction of the Sun on Earth
Answer:
the regular daily rises and falls in sea level caused by the gravitational attraction of the Moon and Sun on Earth.
Explanation:
Tides can be defined as the rise and fall of water level in water bodies such as lakes and oceans due to the gravitational force of attraction exerted by the moon on earth. The side closest to the moon creates a bulge of water known as high tide. Low tides are generally experienced when a sea level is not within the bulge.
Generally, the gravitational pull of the Moon cause visible changes on planet Earth's surface.
This ultimately implies that, the pull of the Moon's gravity causes high and low tides on planet Earth's surface.
The various types of ocean tides based on the position of the Earth, Moon and the Sun are;
I. Neap tides.
II. Spring tides.
III. Low tide.
IV. High tide.
V. Brown tide.
VI. Rip tide.
VII. Red tide.
What is one way to store a lot of potential energy in the field between two charged objects?
Answer:
Explanation:
Two charged particles will vary in energy as we alter the distance between them.
During which type of radioactive decay is the mass number of a nucleus
reduced by four?
O A. Beta decay (electron)
B. Alpha decay
C. Beta decay (positron)
D. Gamma decay
Answer:I think the answer is B. The alpha Deacy but not sure
Explanation:
The type of radioactive decay is the mass number of a nucleus reduced by four is known as alpha decay.
What is meant by alpha decay ?Alpha decay is defined as the type of radioactive decay in which the parent nucleus emits an alpha particle.
Here,
In alpha decay, the parent atomic nuclei emits an alpha particle or helium nucleus and as a result the parent nuclei gets transformed into a different atomic nuclei.
The reaction in alpha decay is given by,
zXᵃ → z-₂Yᵃ⁻⁴ + ₂He⁴
From the reaction, it is shown that the new nuclei formed will have a mass number which is decreased by four from that of the parent nuclei. Also, the atomic number of the new atomic nuclei formed is reduced by two.
Thus, in alpha decay, the mass number of the parent nuclei gets reduced by four.
Hence,
The type of radioactive decay is the mass number of a nucleus reduced by four is known as alpha decay.
To learn more about alpha decay, click:
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