Answer:
2.86 m/s
Explanation:
Speed= distance/time
speed= 100m / 35s
100/35= 2.86 (simplified)
2.86m/s= 100m / 35s
Zeta's speed is 2.86 m/s.
To determine Zeta's speed, we need to use the formula for speed:
Speed = Distance / Time
In this case, Zeta runs across a football field that is close to 100 meters long in 35 seconds. Therefore, the speed calculation will be:
Speed = 100 meters / 35 seconds = 2.86 meters per second (m/s)
Therefore, Zeta's speed is approximately 2.86 m/s.
Which of the following planets has a diameter that is larger than the diameter of the Earth? A. Mars B. Venus C. Neptune D. Mercury
Answer:
Neptune.
Explanation:
Earth has a diameter of 7,915 miles. I know that both Mars, Venus, and Mercury have a smaller size than earth so they must have a smaller diameter. Neptune, with a diameter of 30,599 miles, is the only one bigger than earth.
hope this helps!
What is an acid-base reaction also called?
A. Antacid reaction
B. Neutralization reaction
C. Salt-water reaction
D. Single-displacement reaction
Answer:
B. Neutralization reaction.
Explanation:
Acid base reaction is called neutralization reaction because the product of this reaction are neutral substances.(i.e. salt and water which are neutral in nature as their PH value is 7).
For example...
HCl + NaOH -----> NaCl + H2O
Here, acid(HCl) reacts with base(NaOH) to give nutral substances salt(NaCl) and water(H2O).
Select the correct comparison between science and technology.
A. Science influences technology, but technology does not influence science.
B. Science does not influence technology, but technology influences science.
C.Science and technology both influence each other
D. There is no relationship between science and technology.
Answer:
c
Explanation:
Science influences society through its knowledge and world view. ... Technology influences society through its products and processes
Answer: c
Explanation:
if an object was dropped from an airplane and took 14.2s to fall to the earth , what was the height of the plane
Answer:
1008.2m
Explanation:
H = 1/2gt^2
g is acceleration due to gravity 10m/s^2
= 1/2 x 10 (14.2)^2
= 1/2 x 10 x 201.64
= 1008.2m
Forces that are equal in magnitude but opposite in direction are
A. universal forces.
B.unbalanced forces.
C.unstoppable forces.
D.balanced forces.
Answer:
unstoppable forces
hope this helps u
Explanation:
A ball is dropped off the side of a bridge. after falling 1.55 s, what is its velocity?
Answer:
-15.19 m/s
Explanation:
The 1D kinematic equation for velocity is the v = v0 * at.
In this case, v is the final velocity (what we're after), v0 is the initial velocity, a is the acceleration, and t is the time elapsed.
v0 is 0 because at 0 seconds we are just releasing the ball.
a is the acceleration due to gravity as no other factors are specified.
t is the change in time.
v = 0 * -9.8 m/s^2 * 1.55 = -15.19 m/s.
Answer:
-15.19
Explanation:
A construction worker uses an electrical device to attract fallen nails and sharp objects from a construction site. What is causing the attraction of the metal objects?
An electrical wave oscillating perpendicular to the electrical device.
An electrical charge radiating perpendicular to the wire
A magnetic wave radiating perpendicular to an electrical device
A magnetic wave and electrical current moving in opposite directions
A magnetic wave radiating perpendicular to an electrical device which causes the attraction of the metal objects. Therefore, the correct option is C.
A power tool used by a construction worker probably uses an electromagnet, which produces a magnetic field when an electric current flows through it. Metal objects, including nails and other sharp objects, from the construction site are drawn by this magnetic field. Metal objects are attracted to the device as a result of the interaction of the magnetic field with their magnetic characteristics.
Therefore, the correct option is C.
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Final answer:
The attraction of metal objects by an electrical device at a construction site is caused by a magnetic field created by electromagnets, which use electric current to generate magnetic fields capable of attracting ferromagnetic materials.
Explanation:
The attraction of metal objects, like fallen nails and sharp objects, at a construction site by an electrical device is caused by the creation of a magnetic field through the use of electric current. This process involves electromagnets, which are devices that use electric current to generate magnetic fields, and can attract or repel other metallic objects based on the principles of electromagnetism.
Electromagnetic waves are produced by accelerating charges, such as those in an alternating current. However, in the context of attracting metal objects, what we are observing is not the propagation of electromagnetic waves as a form of radiation, but rather the direct magnetic effect of electric currents flowing through wires or coils. When an electric current runs through a coil, the resulting magnetic field is capable of attracting ferromagnetic materials like iron, commonly found in nails and other construction material.
The correct explanation for the attraction of metal objects with an electrical device in a construction site is the magnetic field generated by an electric current, as described by the discovery of Hans Christian Oersted. His observation that a compass needle was deflected by a current-carrying wire led to the concept of electromagnetism and the use of electromagnets.
In the nucleus of an atom, two protons are separated by a distance of 10^-13 m. What is the Coloumb force between them? The charge of a proton is + 1.602 x 10^-19 C.
Answer:
[tex]F=0.0231\ N[/tex]
Explanation:
Electrostatic Force
When two point charges [tex]q_1[/tex] and [tex]q_2[/tex] are placed at a distance d, they exert a force to each other whose magnitude can be computed by the Coulomb's formula
[tex]\displaystyle F=\frac{k\ q_1\ q_2}{d^2}[/tex]
Where k is the constant of proportionality
[tex]k=9.10^9\ Nw.m^2/c^2[/tex]
The information provided is
[tex]d=10^{-13}\ m[/tex]
[tex]q_1=q_2=+ 1.602 x 10^{-19}\ C[/tex]
Computing the Coloumb force between them
[tex]\displaystyle F=\frac{9x10^9\ 1.602 x 10^{-19} \ 1.602 x 10^{-19} }{(10^{-13})^2}[/tex]
[tex]\boxed{F=0.0231\ N}[/tex]
is the SI unit of work newton?
Answer:
No
Explanation:
The s.i. unit of work is Joules. Work is measured in Joules. It is the product of force and the distance moved in the direction of the force. Force is in Newton while distance is measured in metres.
Ship 1 has 4 times the mass of ship 2. They both have equal kinetic energy. How much faster( by what factor) is ship 2 moving?
2
Explanation:
Let us assume the mass of ship 2 = K
Mass of ship 1 = 4K
Condition:
Both ships have the same mass
The kinetic energy of a body is the energy due to the motion of it.
It is expressed as:
K.E = [tex]\frac{1}{2} m v^{2}[/tex]
m is the mass of the ship
v is the velocity;
Since both ships have equal velocity;
K.E of ship 1 = K.E of ship 2
\frac{1}{2} m v^{2} of ship 1 = \frac{1}{2} m v^{2} of ship 2
multiply through by 2;
[tex]m_{1} v_{1} ^{2} = m_{2} v_{2} ^{2}[/tex]
4k x [tex]v_{1} ^{2}[/tex] = k x [tex]v_{2}^{2}[/tex]
dividing by k;
4 v_{1} ^{2} = v_{2}^{2}
taking square root of both sides
V₂ = 2V₁
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3 m/s north is an example of a(n) ____.
It is velocity. Velocity is a vector quantity. Vector quantity has both magnitude and direction. 3 m/s north has 3 m/s as magnitude and north as direction.
Velocity is a vector quantity. The movement of an object 3 m/s north is an example of Velocity.
Velocity:
It is defined as the rate of change in the position of an object with time, respect to a frame of reference.
In simple word it is the speed of object in a particular direction.It is a vector quantity.Here, 3 m/s second is the speed of the object but the direction of movement is also given hence it is velocity.
Therefore, the movement of an object 3 m/s north is an example of Velocity.
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A 0.1 kg apple drops 2m hitting a spring. The spring deforms 0.1m.
What is the spring constant ?
Answer:
392 N/m
Explanation:
We know that the total mechancial enery will be conserved from when the apple drops to when it hit the spring. Therefore, we can set the potential energy of the apple equal to the elastic potential energy of the spring.
PE = mgh and SE = 1/2kx² — PE is the initial potential energy of the apple and SE is the elastic potential energy of the spring.
mgh = 1/2kx². (.1)(9.8)(2) = (1/2)(k)(.1²), solve for k. k = 392
HELP ASAP
Explain why someone driving a modern vehicle is more likely to survive a car accident than someone driving a classic car (50 years old or older). Assume the details of the crashes are the same other than the type of vehicle being driven.
Modern vehicles tend to have more safety measures, such as more efficient airbags and seatbelts, which can prevent some deadly injuries that come from car crashes. Older vehicles don't have as many safety features due to the lack of technology.
Answer: Its more better bc the modern car has more protection.
Explanation:Hope this helps.
What is the difference between accurate data and
reproducible data?
Answer:
Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.
OR
The data which is accurate means it can't be changed further is called accurate data. while, The data which is changed again and again is called reproducible data. Reproducible data is one component of the precision of a measurement or test method and accurate data is one of the components of data quality.
Answer:
Accuracy is a general concept while precision is more of a mathematical concept. On the whole though, the conceptual boundary between the use of the two words is kind of fuzzy. While accuracy means being correct and true in every detail, precision means being more exact and to the point in reference to a certain standard or method. For example, you can be accurate with your answer but you can be precise with the method of calculation.
Accuracy may also refer to the truthfulness of data and records. For example, you can have accurate demographic data of the people in a city. But, in this case precise would refer more to the inferences you have drawn from the accurate date in your possession about the demography of the city in question.
While accuracy refers more to the correctness of data, precision can also refer to greater detail in description of an object or concept. For example, accuracy can be kept in mind while collecting people’s opinion on the social system of marriage but precision will be required in detailing each case study and interpreting it.
Both accuracy and precision can also refer to results obtained from mechanical objects like a compass and watch. For example, if you have tuned or set your watch and compass accurately, it will be able to give you the current time and direction at any given moment with precision.
Explanation:
explain why solar eclipses do not occur every time the moon revolves around earth
Answer:
the moon, earth, and sun all must be in alignment ; not just the moon and earth
Final answer:
Eclipses occur when the Moon, Earth, and Sun align, but the Moon's orbit inclination causes eclipses to be rare occurrences due to the specific alignment needed for an eclipse to happen.
Explanation:
Eclipses occur when the Moon, Earth, and Sun are directly lined up in the full Moon (lunar eclipse) and new Moon (solar eclipse) positions. Eclipses do not occur every month because the Moon's orbit is inclined about 5 degrees so usually the Moon is little above or a little below the direct line of sight from the Sun.
The reason for the rarity of eclipses lies in the inclination of the Moon's orbit. This inclination causes the Moon to mostly be positioned either above or below the Earth during a new moon, preventing a solar eclipse every month.
While the Moon revolves around the Earth close to once a month, the specific alignment required for an eclipse to occur is met only occasionally due to the intricate orbital dynamics between the Earth, Moon, and Sun.
Which statement best describes the weather shown by the purple combination of semicircles and triangles on a line on a weather map? An occluded front can cause light to heavy precipitation that may last several days. A stationary front may produce rainy or snowy weather for several days. A warm front brings drizzly weather. A cold front can cause heavy rain, thunder, and lightning.
Answer: the answer is:
" An occluded front light to heavy precipitation that my last several days.''
Explanation: i got it right on my test
hope it helps
A warm front is the best description of the weather combinations that are seen in semi-circles and triangles on the weather map.
A warm front is a leading edge of an equator facing warm air mass. A warm front lies in place of low pressure. The front is usually followed by cooler air and gets lifted as a result of this light weight. The warm front is characterized by relatively stable and increasing rainfall.Hence the option C is correct.
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A bird flying at 8 km/h in a 6-km/h crosswind has a resultant speed of
The resultant speed of the bird flying at 8 km/h in a 6-km/h crosswind is 10 km/h.
Explanation:when an object moves against a crosswind, its resultant speed is the vector sum of its actual speed and the velocity of the crosswind. In this case, the bird is flying at 8 km/h while facing a 6 km/h crosswind. To find the resultant speed, we need to use vector addition.
We can represent the bird's speed as a vector going in the direction of its movement, and the crosswind's speed as a vector perpendicular to the bird's path. Using the Pythagorean theorem, we can determine the resultant speed:
Resultant speed = sqrt((speed of bird)^2 + (speed of crosswind)^2)
Resultant speed = sqrt((8 km/h)^2 + (6 km/h)^2)
Resultant speed = sqrt(64 km/h^2 + 36 km/h^2)
Resultant speed = sqrt(100 km/h^2)
Resultant speed = 10 km/h
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What are the 3 properties of magnetics
Answer:
they point north and south directionwhen suspende freely
the poles exist in pairs
they attract magnetic substance
!!MARKING BRAINLIST!! WORTH 30 | You are walking down the hallway and your mean little brother sticks his foot out to trip you. You don't notice and land- SPLAT! - sprawled out on the floor. Based on the laws of motion, why did you fall?
3rd Law: Action- brother sticks out his foot. Reaction- you fall.
1st Law: Your body was an object in motion and stayed in motion.
Since the force stopped only your feet, the rest of your body kept going and fell
2nd Law: You weigh more than your little brother, so you had more acceleration.
4th Law: Little brothers are always mean
Answer:
Since the force stopped only your feet, the rest of your body kept going and fell
Explanation:
Answer:
the answer is the 3rd Law: Action- Brother sticks out his foot. Reaction- you fall.
Hope it helps!
1600 AM broadcasts radio waves with wavelengths
of about 187.37 m. Convert this to miles.
Answer:
The wavelength in miles is 0.1165 miles.
Explanation:
Given:
Wavelength of the radio wave is 187.37 m.
Now, the wavelength is given in meters.
We need to convert the wavelength from meters to miles.
In order to convert meters to miles, we have to use their conversion factor.
We know that,
1 meter = [tex]\frac{1}{1609}\ miles[/tex]
Therefore, the conversion factor is given as:
[tex]CF=\frac{1}{1609}\ miles\ per\ meter[/tex]
So, the wavelength in miles is given as:
[tex]Wavelength=\textrm{Wavelength in meters}\times CF\\\\Wavelength=187.37\ m\times \frac{\frac{1}{1609}\ miles}{1\ m}\\\\Wavelength=\frac{187.37}{1609}\ miles\\\\Wavelength=0.1165\ miles[/tex]
Hence, the wavelength in miles is 0.1165 miles.
If you want to go to a community college and transfer to a four-year university, what classes are required to transfer? How many units are required to transfer?
Typically, most four-year institutions will require the following classes to transfer:
2 English composition courses.
1 Speech course.
1 Critical thinking course.
1 Physical science class.
1 Biological science class.
1 Health class.
2 Physical education courses.
Completion of college algebra
That's all I think
Final answer:
To transfer from a community college to a four-year university, students typically need to complete general education courses and any pre-major or major-specific courses required for their intended degree. The number of units required to transfer generally ranges from 60 to 70 semester units. Consulting with academic advisors and reviewing articulation agreements ensures a smooth transfer process.
Explanation:
If you are planning to transfer from a community college to a four-year university, the specific classes required for transfer can vary based on the university and your chosen major. Generally, you will need to complete a core curriculum that includes general education courses, such as English, mathematics, science, social science, and humanities. In addition to these general requirements, it's important to be aware of any pre-major or major-specific courses needed for your intended four-year degree program.
The number of units required to transfer typically ranges from 60 to 70 semester units, which is equivalent to about two years of full-time study. This allows students to achieve junior standing at the university upon transfer. However, some programs have more stringent requirements, including additional prerequisites or higher GPA standards.
It is crucial to consult with an academic advisor at the community college and to review the transfer agreements in place with the four-year universities you are interested in. These transfer agreements, sometimes called articulation agreements, provide detailed guidance on which courses will fulfill requirements at the university level and help ensure a smooth transition.
how many miles is in 7 blocks?
Answer:
Different street blocks are different lengths, so it won't be possible to answer this.
What is the escape velocity on the Venus ? Venus' mass 4.90*10^ 24 kg and radius is 6.86 * 10 ^ 6 * m
The escape velocity on Venus is 9761 m/s
Explanation:
The escape velocity from a planet is the speed that an object on the surface of that planet must have in order to completely escape the gravitational field of the planet.
Mathematically, it is calculated as
[tex]v=\sqrt{\frac{2GM}{R}}[/tex]
where
G is the gravitational constant
M is the mass of the planet
R is the radius of the planet
For Venus, we have:
[tex]M=4.90\cdot 10^{24}kg[/tex] is the mass
[tex]R=6.86\cdot 10^6 m[/tex] is the radius
Substituting, we find the escape velocity on Venus:
[tex]v=\sqrt{\frac{2(6.67\cdot 10^{-11})(4.90\cdot 10^{24})}{6.86\cdot 10^6}}=9761 m/s[/tex]
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What does M represent in the equation below?
m = M + 5 log(d/10)
A. luminosity
B. spectral class
C. absolute magnitude
D. apparent magnitude
Answer:
m represents apparent magnitude in the equation m = M + 5 log(d/10).
Explanation:
A 2000 kg car drives around a circular exit ramp with a radius of 30 meters. The car drives all the way around the ramp in 10 seconds. How fast is the car driving?"
Answer:
The car is driving at the speed of 18.85 meters per seconds.
Explanation:
Given:
The radius of the circular exit ramp = 30 meters
Mass of the car = 2000 kg
Time = 10 seconds
To Find :
The Speed of the car = ?
Solution:
We know that speed = [tex]\frac{distance}{time}[/tex]---------------(1)
Here the distance is the circumference of the circular exit ramp
Then circumference =[tex]2 \pi r[/tex]
where r is the radius
On substituting the values
Distance = [tex]2\pi(30)[/tex]
Distance = 188.5 meters------------------------(2)
Substituting (2) in (1)
speed =[tex]\frac{188.5}{10}[/tex] seconds
Speed = 18.85 meters per seconds
A mass on a spring with k=88.7 N/m oscillates 15 times in 9.24s. what is the objects mass? unit=kg?
The mass on the spring is 0.86 kg
Explanation:
The period of a mass-spring system is given by the equation
[tex]T=2\pi \sqrt{\frac{m}{k}}[/tex]
where
m is the mass
k is the spring constant
In this problem, we have:
k = 88.7 N/m is the spring constant
The system makes 15 oscillations in 9.24 s: therefore, the period of the system is
[tex]T=\frac{9.24}{15}=0.62 s[/tex]
Now we can re-arrange the first equation to solve for the mass:
[tex]m=k(\frac{T}{2\pi})^2=(88.7)(\frac{0.62}{2\pi})^2=0.86 kg[/tex]
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Answer:
0.86
Explanation:
Acellus
What projection angle produces the longest distance?
Answer:
The sine function reaches its largest output value.
Explanation:1 with an input angle of 90 degrees, so we can see that for the longest-range punts 2θ = 90 degrees and, therefore, θ = 45 degrees. A projectile, in other words, travels the farthest when it is launched at an angle of 45 degrees.
If gravity between the Sun and the Earth suddenly vanished, Earth would continue moving
A. in a curved path B. an outward spiral
C. an inward spiral path D. in a straight-line
Answer:
D, if the sun was removed, all the planets would go flying off into space.
Explanation:
If gravity between the Sun and the Earth disappeared, the Earth would continue moving in a straight line according to Newton's first law of motion or the law of inertia. This law states that an object in motion stays in motion unless acted upon by an external force. In absence of the Sun's gravitational force, Earth would just continue in the direction it was heading, essentially a straight line.
Explanation:If the gravity between the Sun and the Earth suddenly vanished, the Earth would continue moving in a straight line. This principle is based on Newton's first law of motion, also known as the law of inertia. This law states that an object in motion tends to stay in motion unless acted upon by an external force. In our solar system, that external force is primarily gravity from the Sun which keeps Earth in its elliptical orbit. Without this gravitational force, Earth would simply continue in the direction it was heading when the gravity disappeared, which is essentially a straight line.
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Ultraviolet radiation is dangerous because it has a high enough energy to damage skin cells. What is the BEST explanation of the relationship between wavelength and wave energy? A) Wave energy is related only to frequency, not wavelength. B) Longer wavelengths have lower frequencies but higher energy. C) The shorter the wavelength, the lower the frequency and the higher the energy. D) The shorter the wavelength, the higher the frequency and the higher the energy.
The answer is shorter the wavelength, higher the frequency and higher the energy.
Explanation:
The sun radiates UV energy in a wide range of wavelength, which are invisible to human eyes. The shorter the wavelength, the more energetic the radiation, and the greater the potential for harm.
The relationship between wavelength and wave energy is shorter the wavelength, higher the frequency and higher the energy.
It has a frequency ranges from 8 × 10^14 to 3 × 10^16 cycles per second, or hertz (Hz), and wavelengths id about 380 nanometers to about 10 nm.
Answer:
A
Explanation:
A car increases its speed from 4.20 m/s to 8.60 m/s over 3.20 seconds. What is the car’s acceleration?
Answer:1.375metre per second square
Explanation: acceleration=(final velocity-initial velocity)÷time
acceleration=(8.6-4.2)÷3.2
Acceleration=4.4÷3.2
Acceleration=1.375 metre per second square