Answer:
Explanation:
Let us calculate the average velocity .
Average velocity = total distance / total time
Time taken to drive first 15 mi
= 15 / 60 = .25 h
Time taken to drive next 15 mi
= 15 / 30 = .5 h
Total time = .25 + .5 = .75 h
Total distance = 30 mi
average speed = 30 / .75
= 40 mi / h
So average speed is 40 mph which is less than given velocity of 45 mph .
Hence if she travels at 45 mph , she will take less time .
solve this to get a 4 digit code.
Answer:
4321
Explanation:
A:4
B:3
C:2
D:1
Does the Sun actually turn dark during a total solar eclipse? Why or why not?
Answer:
No
Explanation:
The moon is just casting a shadow on the earth
Answer:
The sun does not turn dark during a solar eclipse because during a solar eclipse the moon covers the sun.
Explanation:
How is an electromagnetic field produced? Please I need answers
Answer:
by potential difference and electron gun
Explanation:
a magnetic field is produced whenever an electrical charge is in motion. The spinning and orbiting of the nucleus of an atom produces a magnetic field as does electrical current flowing through a wire. The direction of the spin and orbit determine the direction of the magnetic field.
Answer:
Electromagnetic field can be produced by the superposition of electric field and magnetic field.
Explanation:
What is superposition ?When two or waves propagate in a medium without affecting each other , then at any instant the displacement of a particle will be equal to the vectorial sum of the displacements due to the waves.
Electromagnetic field can be produced by electric arc.It cab be produced by LC Circuits.Hence Electromagnetic field can be produced by L-C CIRCUITS.
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6th grade science I mark as brainliest (can someone answer my other question like this?)
Answer:A: July
B: July and august
C:true
Explanation:
Explain what happens with the 0.25 days each year
Answer:
leap year
Explanation:
Fracture zones are cracks on the ocean floor that horizontally offset mid-ocean ridges, Fracture zones typically run perpendicular to mid-ocean ridges.
The diagram below shows two tectonic plates moving apart
. One plate is dark blue, and the other is light blue. Several fracture zones are shown at
places where parts of the same tectonic plate are moving in the same direction but at different speeds.
ridge
fault
fracture
zone
fracture
zone
Plate Motion
mid-oceani
ridge
Plate Motion
fault
fracture
zone
fracture
zone
+
ridge
The study of the location of fracture zones has provided evidence to support the theory of plate tectonics because
fracture zones indicate the locations of once-active underwater faults.
A.
Answer: fracture zones indicate the locations of once-active underwater faults
Explanation:
WILL GIVE BRAINLIEST
Lucas is carrying his rock collection into class. He carries 30 pounds of rare rocks 15 feet into Classroom 6. It takes him
3 minutes to get them into the classroom What is Lucas's speed and level of work? Be sure to show your work with
equations as part of your answer.
Answer:
10 and 5
Explanation:
Answer:
It is given that,
Force, F = 30 pounds = 133.4 N
Distance, d = 15 feet = 4.572 m
Time taken, t = 3 minutes = 180 seconds
Lucas's speed is given by the ratio of total displacement divided by total time taken. It is given by :
s = 0.0254 m/s
So, her speed is 0.0254 m/s.
Work done, W = F . d
W = 133.4 N × 4.572 m
W = 609.90 J
or
W = 610 J
Hence, this is the required solution.
Which of the following will induce an electric current in a wire?
a. Moving a magnet into a coil of wire
b. Moving a wire between the poles of a magnet
c. Turning a loop of wire between the poles of a magnet.
d. All of the above
Similarities between football and badminton ?
Answer:
Explanation:
Football and badminton enquire you use your lems and you would need equipment
Football and badminton enquire you use your legs and you would need equipment.
What are the similarities between badminton and tennis?Similarities of Tennis & Badminton both are racket sports. both video games consist of a net in which the ball/shuttlecock needs to be hit over the internet to the opponent's court which will win the point. Both video games have guys singles, guys doubles, girls singles, girls doubles, and combined doubles categories.
Each game and sports activities have hard and fast policies, which ensure honest opposition. they may involve teams or individual competitions. Human beings play video games and sports for activity and amusement, but in addition, they benefit from numerous skills and understanding via video games and sports activities.
While soccer is played through feet, handball is a game played by using hand. Both sports have some similarities which consist of the function of the goalkeeper who can play with ft and arms in the strive of saving the ball from attaining the purpose.
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how you use physics in your
everyday life.
Answer:
Explanation:
Physics gets involved in your daily life right from you wake up in the morning. The buzzing sound of an alarm clock helps you wake up in the morning as per your schedule. The sound is something that you can't see, but hear or experience. Physics studies the origin, propagation, and properties of sound
Compare and contrast the SI and the English systems of measurement.
Answer:
The international system of units otherwisely known as SI is widely used and accepted all over the globe while English system of measurement is only used by the British this limits their usage as it is applied in few part of the world which is Britain.
Both units are form of measurement being used for evaluating measurement
Explanation:
Answer:Both systems are used to numerically describe measurement. The SI system is based on the number 10 as well as multiples and products of 10. This makes it much easier to use, and so it has been the accepted system in scientific and technical applications
Explanation:The English system is more complicated as relationships between units of the same quantity aren’t uniform.
A light source emits light with dominant wavelengths in the range of 650 to 690 nm. what is the principle color of light emitted by the source?
Answer:
Please see below as the answer is self-explanatory.
Explanation:
The visible range extends roughly from 400 nm (violet) to 700 nm (red).Below the violet is the ultra-violet spectrum (with higher energy) and above red, we have the infra-red spectrum.The wavelengths in the range of 650 to 690 nm have red as the dominant color.A model depicts two balloons of the same size with identical negative charges being moved toward one another at the same speed. How will the balloons interact with each other?
A.) They will repel, moving in opposite directions at the same speed.
B.) They will repel, moving in the same direction at different speeds.
C.) They will attract, moving in the same direction at the same speed.
D.) They will attract, moving in opposite directions at different speeds.
Answer:
A.) They will repel, moving in opposite directions at the same speed.
Explanation:
The correct option is - A.) They will repel, moving in opposite directions at the same speed.
As because the two balloons have identical charge and moving towards each other , so they repel each other (as we know like charges repel each other)
Option A is correct. (A.) They will repel, moving in opposite directions at the same speed. Because the megnitude and nature of the charge are same.
What is Columb's law?The force of attraction between two charges, according to Coulomb's law, is directly proportional to the product of the charges and inversely proportional to the square of the distance between them.
Charges that are similar repel each other, whereas charges that are diametrically opposed attract each other.
They will repel, moving in opposite directions at the same speed. Because the megnitude and nature of the charge are same.
Hence option A is correct. (A.) They will repel, moving in opposite directions at the same speed.
To learn more about Columb's law refer to the link;
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what is a likely consequence of continued human population growth
Answer:
Rapid human population growth has a number of consequences. Population grows fastest in the world's poorest countries. High fertility rates have historically had a strong relation with poverty, and high childhood mortality rates
Explanation:
i got it from goo.gle but i hope that helps:)
have a good day bro
Help ASAP please eheesj
1. What is the equivalent resistance in this circuit?
2. What is the current in this circuit?
1. The equivalent resistance in a series circuit, like the one shown, is given by the general equation
[tex]R_{S} = R_1 + R_2 + R_3 + . . . + R_{N-1} + R_N = \sum_{i=1}^N R_i[/tex]
where N is the number of resistors in series. Here, there are four resistors in series. Using our equation with N = 4, we obtain
[tex]R_{S} &= R_1 + R_2 + R_3 + R_4 \\ R_{S} = 2.0 \, \Omega + 3.0 \, \Omega + 4.0 \, \Omega + 6.0 \, \Omega \\ R_{S} = 15.0 \, \Omega.[/tex]
2. The current in this series circuit is equal to the voltage divided by the equivalent resistance (a relationship you can derive from Ohm's law):
[tex]I = \frac{V}{R_{S}} = \frac{45 \, V}{15.0 \, \Omega} = 3.0 \, A. \nonumber[/tex]
In your community, there are lots of cats that are roaming around. What can
you do to take good care of these animals?
What factor that influence science research?
Answer:
The general norms of science;
The nature of particular scientific disciplines and the traditions of organizing a specific body of scientific knowledge;
The Role of Individual Scientists and Research Teams
institutional Policies
Social Attitudes and Expectations
Explanation:
14. Convert 22 degrees celsius to fahrenheit.
Please show your work
Answer:71.6 F
Explanation:
(22 x 9/5) + 32
proof that the kinetic energy of a moving body is half mv square
Answer:
1
Explanation:
image.
A concave lens always produces a(n)
A. inverted
o
B. real
C. virtual
D. magnified
Answer:
Explanation:
Its Virtual, how would you describe the image formed by a convex mirrior? virtual upright, smaller
Describe how the boiling point of water on top of a mountain would be different from its boiling point at sea level.
Answer:
At elevated altitudes, any cooking that involves boiling or steaming generally requires compensation for lower temperatures because the boiling point of water is lower at higher altitudes due to the decreased atmospheric pressure.
Explanation:
Answer:
The Lower the air pressure the lower the boiling point.
The density of water is 1.0g/cm3. How many kilograms of water does a submerged 120-cm3 block displace? Recall that 1.0 kg weighs 9.8 N on Earth. What is the buoyant force on the block?
Answer:
The mass of the liquid displaced is 0.12 kgThe buoyant force on the block is 1.176 N.Explanation:
Given;
density of water, ρ = 1.0 g/cm³
volume of the submerged block, V = 120 cm³
Applying Archimedes principle;
The mass of the liquid displaced is calculated as;
m = ρV
m = 1.0 g/cm³ x 120 cm³
m = 120 g
m = 0.12 kg
The buoyant force on the block is calculated as;
F = mg
F = 0.12 x 9.8
F = 1.176 N
Therefore, the buoyant force on the block is 1.176 N.
Which of the following Laws deal with speeding up and increasing velocity?
inertia, reaction, acceleration.
Newtons first law of motion
Indicate the substance that is NOT an element.
A)iron
B)oxygen
C)water
D)carbon
E)hydrogen
Water pollution can come from the _______ of dead organic matter or animal waste in waterways.
Water pollution can come from the remains of dead organic matter or animal waste in waterways
Answer:
Water pollution can come from the remains of dead organic matter or animal waste in waterways.
A 25N force is applied to a bar that can pivot around its end. The force is r=0.75 m away from the end of an angle at 0= 45. what is the torque on the bar?
a. What is the direction of the torque.
b. what is the sign of the direction of the figure.
Answer:
The answer is B. I had a question like this last week in my physics practice exam. dont have alot of time so I cant explain right now
Explanation:
The torque on the bar will be - 13.26 Nm. And the sign of the direction of the figure will be inside the plane.
What is the torque?Torque is the rotating counterpart of force in physics and mechanics. The instant of force is another name for it. It illustrates how a force can cause a change in the body's rotational movement.
Let 'F' be the force and 'r' be the distance.
The torque is the vector product of the force and radius which is given as,
T = r x F
T = r · F · sin θ
A 25N power is applied to a bar that can turn around its end. The power is r = 0.75 m away from the finish of a point at θ = 45°.
Then the torque is calculated as,
T = - 0.75 x 25 x sin 45°
T = - 13.26 Nm
The sign of the direction of the figure will be inside the plane.
More about the torque link is given below.
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When the thinnest string is pressed down at the fret closest to the bridge (d = 20.0 cm) and the string plucked near the midpoint, the vibrating string produces a sound with a frequency of 2,380 Hz. If the guitarist moves to the next fret (second-closest to the bridge), the sound produced has a frequency of 2,237 Hz. Determine the distance (in cm) between the frets. (Assume the given frequencies are fundamental frequencies.)
Answer:
The answer is "1.278498"
Explanation:
Given formula:
[tex]f = (\frac{1}{2L}) \sqrt{(\frac{T}{m})}[/tex]
[tex]f ( \ at\ L = 20.0) \ = 2380\\\\for \ L + x ,\\\\ f = 2237\ H_zso,[/tex]
[tex]\to \frac{2380}{2237} = \frac{(L + x)}{L}\\\\\to \frac{2380}{2237} = 1 + (\frac{x}{L})\\\\\to 1.0639249=1+(\frac{x}{L})\\\\\to 1.0639249 -1=(\frac{x}{L})\\\\\to \frac{x}{L}= 0.0639249\\\\ \to x= 0.0639249\times 20.0 \\\\ \to x= 1.278498[/tex]
A boy starts from point A and walks 3 meters toward the north, then turns around and walks 6 meters toward the south.
What was the distance traveled by the boy?
Answer:
Total distance traveled = 9 m
Explanation:
Given:
Distance travel towards north = 3 meter
Distance travel towards south = 6 meter
Find:
Total distance traveled
Computation:
Total distance traveled = Sum of total distance
Total distance traveled = Distance travel towards north + Distance travel towards south
Total distance traveled = 3 m + 6 m
Total distance traveled = 9 m
If a 400 watt motor is left on for 10 minutes, assuming no energy is lost to friction, how fast could a 100 kg cart be moving?
Answer:
69.28 m/s
Explanation:
From the question given above, the following data were obtained:
Power = 400 Watt
Time (t) = 10 minutes
Mass (m) = 100 Kg
Velocity (v) =?
Next, we shall convert 10 mins to seconds (s). This can be obtained as follow:
1 min = 60 s
Therefore,
10 mins = 10 × 60
10 mins = 600 s
Next, we shall determine the energy. This can be obtained as follow:
Power = 400 Watt
Time (t) = 600 s
Energy (E) =?
E = Pt
E = 400 × 600
E = 240000 J
Finally, we shall determine how fast the cart is moving. This can be obtained as illustrated below:
Mass (m) = 100 Kg
Energy (E) = Kinetic energy (KE) = 240000 J
Velocity (v) =?
KE = ½mv²
240000 = ½ × 100 × v²
240000 = 50 × v²
Divide both side by 50
v² = 240000 / 50
v² = 4800
Take the square root of both side
v = √4800
v = 69.28 m/s
Thus, the cart is moving with a speed of 69.28 m/s