Answer:
71.4 m/s
Explanation:
Car A and Car B are both driving towards each other. Car A's speedometer shows that it is going 30 mph. Car B's speedometer shows that is going 45 mph. What is Car B's speed relative to Car A?
Select one:
-120 mph
-45 mph
-30 mph
-30 mph
-75 mph
Answer:
120 mph I don't know for sure but still this came in my mind
A crowd in a stadium is heard by a man standing 823.2 m away. The man hears the noise
2.5 seconds after the noise occurs. How fast was the sound traveling?
What’s the answer?
Answer: 329.28 m/s
Explanation:
Given that:
Distance of sound = 823.2 m
Time taken for sound = 2.5 seconds
The speed of traveling sound = ?
Speed is obtained by dividing the distance travelled by the time taken for the travel.
Speed = Distance / time
Speed = 823.2m/2.5 seconds
Speed = 329.28 m/s
Thus, the sound traveling as fast as 329.28 m/s
Groups of stars that are smaller than galaxies are called
(two words)
Enter the answer
Final answer:
Groups of stars smaller than galaxies are known as star clusters, including open clusters with younger stars, and are much smaller than galaxies like the Milky Way.
Explanation:
Groups of stars that are smaller than galaxies are known as star clusters. These formations range from hundreds to thousands of stars bound together by gravity. Among star clusters, there are two main types: open clusters and globular clusters. The former consists of younger stars that typically have formed out of the same nebula and can include up to a few thousand stars.
Examples include entities like the Jewel Box. On the larger scale, galaxies like the Milky Way are vast collections of stars, with numbers ranging from a few million to many billions. The Milky Way, which contains all the stars we can see in the night sky, has a diameter of about 100,000 light-years, contrasting with the smaller star clusters.
1. If you push a 40.0kg mass object with a force of 145.ON, what will be the object's
acceleration?
Newton said . . . F = m a
Divide each side by m . . . a = F / m
Acceleration = (force) / (mass)
Acceleration = (145.O N) / (40.0 kg)
Acceleration = 3.625 m/s²
Approximately eleven million people are diagnosed with cancer each year. Thus, many countries, including the United States, spend millions of dollars annually on cancer research. Which of the following statements is best supported by the above information?
A.
The United States is the only country concerned about cancer.
B.
More money should be spent on science.
C.
Social concerns can affect science.
D.
Cancer is the only disease that should be researched.
Answer this question and you get brainliest. Ok, ok
9+10=?
Answer:
C.
Explanation:
(Coronita virus)
17
Answer:
i dont know
Explanation:
We all know that the Earth cycles through a regular pattern of days and nights.
What causes this pattern?
A) The tilt of the Earth on its axis.
B) The sun turns on, and then goes out.
C) The rotation of the Earth on its axis.
Eliminate
D) The rotation of the sun around the earth.
A 50 kg man stands on the surface of a frozen pond. In order to get to the side of the pond he throws his 1 kg shoes at a speed of 10 m/s. After that what’s the speed of the man? ( neglect all frictions)
Answer:
As per law of conservation of momentum
1 × 10 = 50× v
v = 1/5 m/S
Or
20 cm/s
Final answer:
The velocity of the man after throwing his shoes is -0.2 m/s.
Explanation:
To determine the speed of the man after throwing his shoes, we can use the principle of conservation of momentum. The initial momentum of the man and his shoes is zero, as they are both at rest. When he throws his shoes, their momentum becomes non-zero, but the total momentum of the system remains zero.
Since the shoes have a mass of 1 kg and a velocity of 10 m/s, their momentum is calculated by multiplying the mass and velocity, giving us a momentum of 10 kg·m/s. To maintain the total momentum at zero, the man's momentum must be -10 kg·m/s.
Since momentum is the product of mass and velocity, we can rearrange the equation to solve for the velocity of the man. Dividing the momentum by the mass of the man (50 kg), we find that the velocity of the man is -0.2 m/s.
Meclanical Energy
Which of the following has the most
kinetic energy?
A. stretching a rubber band
B. a jet flying through the air
throwing a paper airplane
D. pitching a baseball
C
INS
SENES
F
11IBRE
IRST
Tilt IIIIIIIIIIIIIIIII
HIPERTIRERERTIF
I
TTI
TETE
BREITE
SAR
THIERRE FEITER
THE
TITRE
NESE
214
HHHHEEE
DELLE HHI
HELEHHHHHHHHHHHHHHHHHHHHH
T
RETILI
TERSEHEHEEEEVE
CETTE
PITHEELIEBTEILULITRIIL
E
ETTERITIE
D EPPS
HELHEFTIRILATEESEEN
HILTI TITULI
HTETITELLEH
TITUTI
TIITTIILIDE
HEHEHE
ETILIHITTE
Answer:
a jet flying through the air making a paper airplane
Which point has the greatest electric potential energy?
Answer:
D on Edge
Explanation:
In the Bronsted-Lowry Theory of acids and bases, an acid is this.
In the Brønsted-Lowry theory, an acid is a species that can donate a proton, expanding the definition of acids and bases beyond the Arrhenius theory to include a wider variety of chemical reactions.
Explanation:According to the Brønsted-Lowry theory of acids and bases, an acid is defined as a species that can donate a proton (hydrogen ion, symbolized as H+) to another molecule. This concept was introduced in 1923 when Johannes Brønsted and Thomas Lowry independently proposed that acids and bases should be defined by their ability to donate and accept protons, respectively. This definition broadened the understanding of acids and bases beyond the previous Arrhenius definition, which was limited to substances dissociating in water to provide hydronium and hydroxide ions.
For example, in the reaction between ammonia (NH3) and water (H2O), ammonia acts as a Brønsted-Lowry base by accepting a proton from water, which acts as a Brønsted-Lowry acid. As a result, the ammonium ion (NH4+) and hydroxide ion (OH−) are formed:
NH3(aq) + H2O(l) ⇒ NH4+(aq) + OH−(aq)
Which of the following is true for the image formed in a plane mirror? (Select all that applies) The image...
A. is behind the mirror
B. has the same size as the object
C. is formed as the same distance from the mirror as the object
D. is flipped relative to the mirror
E. cannot be seen
Answer:
right options are:
A
B
C
D
Suppose you wanted to produce a sound wave with a wavelength of 1m
in room temperature air. What would its frequency be? *
Answer:
340 Hz
Explanation:
The frequency of a wave is the number of oscillations completed by the wave per second.
For a wave, the relationship between wavelength of the wave and its frequency is given by the wave equation:
[tex]v=f\lambda[/tex]
where
v is the speed of the wave
f is its frequency
[tex]\lambda[/tex] is its wavelength
In this problem, we have a sound wave, with wavelength of
[tex]\lambda=1m[/tex]
The speed of sound waves at room temperature is
[tex]v=340 m/s[/tex]
Therefore, using the previous equation, we can find the frequency of the wave:
[tex]f=\frac{v}{\lambda}=\frac{340}{1}=340 Hz[/tex]
The frequency of the sound wave with a wavelength of 1 meter in room temperature air would be approximately 343 hertz (Hz).
To find the frequency of a sound wave when given its wavelength, we can use the formula for the speed of sound in a medium, which is given by:
[tex]\[ v = f \times \lambda \][/tex]
where [tex]\( v \)[/tex] is the speed of sound in the medium, [tex]\( f \)[/tex] is the frequency of the sound wave, and[tex]\( \lambda \)[/tex] is the wavelength of the sound wave.
We know that the speed of sound in room temperature air (which is approximately 20°C or 68°F) is about 343 meters per second (m/s). The wavelength [tex]\( \lambda \)[/tex] given in the question is 1 meter.
Rearranging the formula to solve for frequency[tex]\( f \)[/tex], we get:
[tex]\[ f = \frac{v}{\lambda} \][/tex]
Substituting the known values into the equation:
[tex]\[ f = \frac{343 \text{ m/s}}{1 \text{ m}} \] \[ f = 343 \text{ Hz} \][/tex]
Therefore, the frequency of the sound wave with a wavelength of 1 meter in room temperature air is 343 Hz. This frequency corresponds to a pitch that is slightly higher than the B4 note on a musical scale, which is close to the upper limit of what most people can comfortably hear.
What is a scalar quantity? Vector quantity? How are these two different?
Answer: Scalar quantity has magnitude but no direction while a vector quantity has both magnitude and direction.
Explanation:
A scalar quantity is a physical quantity that has magnitude but no direction. Examples are
- temperature, measured in Kelvin
- distance, measured in metres
- speed, measured in metres per second
Vector quantity, on the other hand, is a physical quantity that have both magnitude and direction. Examples are:
- velocity, measured in metres per second (m/s)
- force, measured in newton
- displacement, measured in metres
A car travelling at 40 m/s comes to a halt in 8 seconds. What is the car’s acceleration and how far does it travel while it is stopping?
Answer: Acceleration = 5m/s^2; Distance traveled = 320 m
Explanation:
Velocity of car = 40m/s
Time taken = 8 seconds
Acceleration = ?
Distance traveled = ?
A) Since acceleration is the rate of change of velocity per unit time
i.e acceleration = velocity / time
acceleration = 40m/s / 8 seconds
Acceleration = 5m/s^2
B) To get how far the car traveled before stopping, obtain the distance from the formula:
velocity = distance traveled / time
40m/s = distance / 8 seconds
Distance = 40m/s x 8 seconds
Distance = 320 m
Thus, the car’s acceleration is 5m/s^2 while it traveled 320 metres before stopping.
Final answer:
Acceleration and distance traveled during car's stoppage are -5 m/s² and -160 meters respectively.
Explanation:
Acceleration: To find the car's acceleration, we use the formula: acceleration = (final velocity - initial velocity) / time taken. Substituting the values, we get acceleration = (0 - 40 m/s) / 8 s = -5 m/s².
Distance Traveled: To calculate the distance the car travels while stopping, we use the equation: distance = initial velocity * time + 0.5 * acceleration * time^2. Substituting the values, the car travels a distance of -160 meters while stopping.
A student adds 10 mL of hydrochloric acid to a 20 ml sodium hydroxide solution. What will most likely happen to the pH of the solution?
Answer: The pH decreases
Explanation:
- Hydrochloric acid, as an acid has a pH value below 7
- Sodium hydroxide, as an alkali has a pH value above 7.
The alkali neutralizes the acid to give a salt as in the equation:
HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l)
Hence, the aqeous sodium chloride, NaCl has a pH value of 7 (neutral) which is then a decrease from the above 7 pH value of the sodium hydroxide solution.
Thus, the pH decreases
HELP PLEASE!
Which of the following statements is a true statement about the use of nuclear energy as an alternative energy source?
A. Production of electricity from nuclear energy does not produce dangerous radioactive waste products.
B. Production of electricity from nuclear energy is a lot more expensive than production of energy from fossil fuels.
C. Production of electricity from nuclear energy does not produce greenhouse gases that contribute to global warming.
D. Uranium is a renewable resource
Answer: C
Production of electricity from nuclear energy does not produce greenhouse gases that contribute to global warming
Explanation: Nuclear energy is considered as non-renewable energy source. Although nuclear energy itself is a renewable energy source, the material used in nuclear power plants is not.
Nuclear power emits more greenhouse gases per kilowatt hour than all renewables, including biomass, hydroelectric, solar and wind. Reactors produce significantly less carbon dioxide than all fossil fuels. We can therefore conclude that Production of electricity from nuclear energy does not produce greenhouse gases that contribute to global warming.
The answer is C. Production of electricity from nuclear energy does not produce greenhouse gases that contribute to global warming. Sorry that this is super late, but I still wish you good luck with the rest of your work!
What is the dry adiabatic rate?
Answer:
Explanation:
he dry adiabatic rate is the rate at which dry air changes its temperature as a result of expansion or compression. The dry adiabatic rate is 1.0o C/100 meters. Air rises and cools at the dry adiabatic rate up to the level of condensation where dew point temperature is reached.
The dry adiabatic rate is the rate of temperature change in unsaturated air as it ascends or descends in the atmosphere, approximately 1 degree Celsius per 100 meters. This rate applies until the air becomes saturated, after which it cools at the wet adiabatic rate.
Explanation:The dry adiabatic rate, often used in meteorology, refers to the rate at which a parcel of dry or unsaturated air changes temperature as it moves vertically in the atmosphere. This rate is approximately 1 degree Celsius per 100 meters (or 10 degrees Celsius per kilometer) of ascent or descent. However, this rate holds true only for dry or unsaturated air; once air becomes saturated, it cools at a different rate known as the wet adiabatic rate.
To illustrate, imagine a balloon filled with air that's heated and starts to rise. As the balloon ascends, the pressure around it decreases. This causes the air in the balloon to expand and cool. This cooling process continues at the dry adiabatic rate until the air in the balloon becomes saturated.
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Electrons are transferred in the formation is blank bonds
Answer:Electrons are transferred in the formation is ionic bonds.
Explanation:Why is because ionic bonds are caused by electrons transferring from one atom to another.
Electrons are transferred in the formation of ionic bonds, leading to the creation of oppositely charged ions that attract each other due to electrostatic forces. This process differs from covalent bonding, which involves the sharing of electrons instead of a full transfer.
Electrons are transferred in the formation of ionic bonds. When an electron is transferred from one atom to another, it results in the creation of two oppositely charged ions: a cation, which is positively charged, and an anion, which is negatively charged. These ions are then attracted to each other due to their opposite charges, and this electrostatic attraction is what constitutes the ionic bond.
Unlike covalent bonds, where electrons are shared between atoms, ionic bonding involves a full transfer of electrons. Ionic compounds, such as sodium chloride (NaCl), are typical examples where the sodium atom donates an electron to the chlorine atom, leading to the formation of Na+ and Cl- ions.
Furthermore, ionic bonds are essential in creating compounds with stable electron configurations, often resulting in the formation of a crystalline lattice structure. The strength of the ionic bond is influenced by the charge and size of the ions. Highly charged and smaller ions will tend to form stronger ionic bonds due to the greater electrostatic forces at play.
Which 3 components must be used in order for a light bulb to light?
a. Battery
b. Fuse
c. Light Bulb
d. Switch
e. Wire
Answer:
a,e,d
Explanation:
i got it right when i was doing study island
The current in a lamp is 0.5 ampere when it is plugged into a standard wall outlet. What is the resistance of the lamp when it is plugged into a standard wall outlet?
The resistance of the lamp plugged in to a standard wall outlet with a current of 0.5 amps is 240 Ω (ohms)
Explanation:
In the United States Of America the standard voltage is 120 v and their frequency is 60 Hz
Standard wall outlet voltage is 120 V
The current in the lamp is 0.5 ampere
Resistance (R) = V/ I
= 120/0.5
= 240Ω (ohms)
Thus the resistance of the lamp plugged in to a standard wall outlet with a current of 0.5 amps is 240 Ω (ohms).
The resistance of the lamp when it is plugged into a standard wall outlet is 240 Ohms.
Given the following data:
Current = 0.5 AmpereNote: In the United States of America, a standard wall outlet supplies a voltage of 120 Volts.
To determine the resistance of the lamp when it is plugged into a standard wall outlet, we would apply Ohm's law:
Ohm's law states that at constant temperature, the current flowing through an electrical circuit is directly proportional to the voltage (potential difference) applied across its terminals and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex]V=IR[/tex]
Where;
V is the voltage measured in Volts.I is the current measured in Ampere.R is the resistance measured in Ohms.Making R the subject of formula, we have:
[tex]R=\frac{V}{I}[/tex]
Substituting the given parameters into the formula, we have;
[tex]R=\frac{120}{0.5}[/tex]
Resistance, R = 240 Ohms
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The molecular compound that has a ratio of two oxygen atoms
to one carbon atom is named
Carbon dioxide
MoleculesA molecule is a chemically bound collection of two or more atoms that are electrically neutral. The absence of an electrical charge distinguishes molecules from ions. A molecule is a group of two or more atoms of the same or distinct elements that are chemically linked together.The chemical molecule with a two-to-one oxygen-to-carbon atom ratio is known as carbon dioxide.Find out more information about the carbon dioxide:
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Using the periodic table, predict the formulas of stable ionic compounds. Select THREE that are correct.
Bas, barium sulfide
MgCl2, magnesium chloride
KO, potassium oxide
LiBr2, lithium bromide
Na20, sodium oxide
The formulas of stable ionic compounds are:
MgCl₂, magnesium chloride
LiBr₂, lithium bromide
Na₂O, sodium oxide
What are Ionic compounds?They are neutral compounds made up of positively charged ions called cations and negatively charged ions called anions.
The stable ionic compounds out of the given option are:
MgCl₂, magnesium chloride
LiBr₂, lithium bromide
Na₂O, sodium oxide
They are formed when a cation and anion reacts to form a stable compound. It is based on the valency or the charge of the particular ion.
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Please help!
SELECT ALL THAT APPLY
The following diagram shows the path of a planet around the Sun. Kepler discovered that ____.
1. area A = area C.
2. the distance from P2 to P3 equals the distance from P5 to position P6
3. the speed in the interval from P4 to be P5 equals the speed in the intervals from P6 to P1
4. the speed on the interval from P4 to P5 is greater than the speed in the interval from P1 to P2
SELECT ALL THAT APPLY
Answer:
I think the answer is 3 and 4
Answer:3 and 4
Explanation:
Social loafing is most likely to occur _____.
when no one wants to volunteer to help
when no single person in a group is being watched
during a team sporting event
when people realize they must work alone
Answer:
Answer is when no single person in a group is being watched.
Refer below.
Explanation:
Social loafing is most likely to occur:
when no single person in a group is being watched.
Social loafing is most likely to occur when people realize they must work alone.
Thus, Social media refers to methods of communication where individuals produce, share, and/or exchange knowledge and concepts in online groups and networks.
For schools, departments, and offices wishing to establish or maintain an existing social media presence, we provide a variety of tools, including individualized consultations where we review social media goals and strategy and provide insights and ideas.
You must fill out the Account Request Form before opening any social media accounts. If your school has any rules or branding requirements, be sure to ask the communications office about them.
Thus, Social loafing is most likely to occur when people realize they must work alone.
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ANSWER PLS THIS WILL BRING MY GRADE REALLY HIGH UP Which of the following is not a compound
Question 7 options:
H2
CH4
C2 + H3 + O2 = C2H3O2
H2O
What is the current in a 160V circuit if the resistance is 2Ω? V= I= R =
Answer:
80 amperes
Explanation:
Current in the circuit = ?
Voltage in the circuit = 160 Volts
Resistance = 2 Ω
Voltage = Current x Resistance
V = IR
160V = I x 2 Ω
I = 160V / 2 Ω
I = 80 Amperes
Therefore the current in the circuit is 80 amperes :)
The current through the 160V circuit with a resistance is 2Ω is 80 Ampere.
What is the current flowing through the circuit?From Ohm's law, the relationship between voltage (V), current (I), and resistance (R) can be expressed as:
V = I × R
Given the parameter:
Voltage V = 160 V
Resistance R = 2 ohms
Current I = ?
Plug the given value into the equation and solve for the current I:
V = I × R
160 = I × 2
I = 160/2
I = 80 Ampere
Therefore, the current I is 80 Ampere.
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Help ASAP, will give brainliest!!!
Which type of nuclear reaction produces a neutron, energy, and one large nuclei?
A. nuclear fission
B. nuclear fusion
C. thermodynamic reaction
D. combustion
Answer:
A
Explanation:
I think it is Nuclear fission because it can release a large amount of energy.i hope this helps☺️
compare water(H20) to a single atom of oxygen(O) . is each an element or a compound explain
Answer:
compound
Explanation:
A compound is composed of two or more different elements combined together. Water is made up of 2 atoms of hydrogen and one atom of oxygen combined together. Water is therefore made up of two separate elements, which makes it a compound.
Water (H₂O) is a compound made of hydrogen and oxygen in a fixed ratio, while a single atom of oxygen (O) is an element.
Elements consist of only one type of atom, while compounds are made of multiple types of atoms.
16. Compared to your weight and mass on Earth, if you were on the moon: *
A. your weight and mass would be less.
B. your weight would be less but your mass would remain the same.
C. your weight would remain the same, but your mass would be less.
D. your weight would increase, but your mass would remain the same.
Answer:
The answer is D.
Explanation:
There is no gravity in Space so that means that it will decrease your weight but not your mass.
Please give BrainiestYour mass would remain the same on the Moon or any other celestial body because it is a constant measure of the matter within you. However, your weight would be less on the Moon due to its weaker gravitational pull compared to Earth. The correct answer, therefore, is B - your weight would be less but your mass would remain the same.
Explanation:When considering the comparison of weight and mass on the Moon versus the Earth, it's important to clarify the difference between the two concepts. Mass is a measure of the amount of matter in an object, and it remains constant regardless of location. On the other hand, weight is the force exerted on an object due to gravity and varies depending on the gravitational pull of the celestial body you're on.
The acceleration due to gravity on the Moon is approximately 1.625 m/s², significantly less than the Earth's gravitational acceleration of 9.80 m/s². So, if you were to move from Earth to the Moon, your mass would remain the same because the quantity of matter you consist of does not change. However, because the Moon's gravity is weaker, you would weigh less. This decrease in weight is attributed to the lower gravitational pull, not to a loss of mass.
The correct answer to the question posed is: B. your weight would be less but your mass would remain the same. This reflects the understanding that while the gravitational force acting on you decreases, the actual matter that you are made of does not change.
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Which of the following is NOT a
state of matter?
A. gas
B. light
C. liquid
D. solid
Answer:B
Explanation:
Answer:
b
Explanation:
Because light is not a state of matter