Answer: 20.4 miles
Explanation:
Here we need to use the equation:
Velocity = Distance/Time.
Initially we have that he can travel 30 miles in 2 hours, so the velocity is:
V = 30mi/2h = 15mph
Now, we reduce the velocity by 3 mph, so the new velocity is 15mph - 3 mph = 12mph.
Now we want to know the distance traveled in 1.7 hours with this velocity, this is.
Velocity*Time = Distance
12mi/h*1.7h = 20.4 miles
Due very soon! 100 points please answer for all three diagrams!
The woman supports a 100 N load with the friction free pulley system shown below. Fill in the spring scale readings that show how much force she must exert.
Answer:
1. 100N 2. 50N 3. 50N
Explanation:
The spring scale reading that shows how much force she must exert is 1. 100N 2. 50N 3. 50N.
What is the spring scale?A simple and affordable way to determine mass is by using spring balances. The mass is suspended from the end of the spring, and the spring's deflection as a result of the mass's downward gravitational pull is measured in relation to a scale.
The word "force" has a specific meaning in science. At this level, calling a force a push or a pull is entirely appropriate. A force is not something an object "has in it" or that it "contains."
One thing experiences a force from another. There are both living things and non-living objects in the concept of a force.
Therefore, her required force is indicated by the spring scale readings of 1. 100N, 2. 50N, and 3. 50N.
To learn more about spring scale, refer to the link:
https://brainly.com/question/13949751
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After nuclear explosions animals and humans can continue to die due to ingestion of radioactive particles and nuclear ______________.
fallout
rainout
whiteout
how are magnetic field lines like electric field lines?
A. they always point away from the north pole
B. they never connect
C. they always point toward a negative pole
D. they never cross
Answer:
I think maybe D
Explanation:
A is wrong, it has to be reversed
B is wrong cause they connect at the poles
C is wrong cause they always point north (that's how compases work)
D is the only one that could be possible
Hope this helped! :D
Which of these forces pull or push upward, and which pull or push downward? Explain.
Answer:
A force is a push or pull that acts upon an object as a result of that objects interactions
Explanation:
Assemble the electromagnetic spectrum by dragging each piece to the correct place on the wavelength scale.
Answer:
long wave with a frequency of nos 10⁶ Hz, to radio waves
* order of 10⁸ Hz TV and FM
* in the 10⁹ to 10¹¹ Hz microwave range
* in the range of 10¹² to 10¹⁴ infrared waves, thermal energy
* in the range of 10¹⁴ visible light captured by humans
* for range 10¹⁵ to 10¹⁸ UV light
* in the range of 10¹⁶ to 10²⁰ X-rays
* for more than 10¹⁹ Hz cosmic rays
Explanation:
The electromagnetic spectrum is formed by transverse waves that are the oscillations of electric and magnetic fields
c = λ f
in general this spectrum is divided into range depending on the uses of the waves
from lower frequency to higher we have
* long wave with a frequency of nos 10⁶ Hz, corresponds to radio waves
* tv wave and modulated frequency, of the order of 10⁸ Hz, television and FM radio
* in the 10⁹ to 10¹¹ Hz microwave range
* in the range of 10¹² to 10¹⁴ infrared waves,
* in the range of 10¹⁴ visible light captured by humans
* for range 10¹⁵ to 10¹⁸ UV light
* in the range of 10¹⁶ to 10²⁰ X-rays
* for more than 10¹⁹ Hz cosmic rays
Answer:
long wave with a frequency of nos 10⁶ Hz, to radio waves
order of 10⁸ Hz TV and FM
in the 10⁹ to 10¹¹ Hz microwave range
in the range of 10¹² to 10¹⁴ infrared waves, thermal energy
in the range of 10¹⁴ visible light captured by humans
for range 10¹⁵ to 10¹⁸ UV light
in the range of 10¹⁶ to 10²⁰ X-rays
for more than 10¹⁹ Hz cosmic rays
Explanation:
ASAP pls answer Correctly and I will mark the brainliest
PLS I NEED THIS QUICK! WILL GIVE BRAINLIEST!
how is work related to potential and kinetic energy?
Which electromagnetic radiation can be seen with the human eye?
ultraviolet rays and visible light
infrared rays, visible light, and ultraviolet rays
visible light
visible light and X-rays
Answer:
Visible light
Explanation:
Answer:
C visible light
Explanation:
When an atom in a reactant loses electrons, what happens to its oxidation number?
A. Its oxidation number decreases
B. Its oxidation number doubles.
C.Its oxidation number increases.
D.Its oxidation number increases by one.
E. Its oxidation number stays the same.
The white disks in the petri plates are soaked in herbicide, which affects the roots, stalks, leaves, and cobs of a corn plant. If the transformed plants were grown in the presence of herbicide, which corn plant would result from the choices shown below?
A. Corn plant A.
B. Corn plant B.
C. Corn plant C.
D. Corn plant D.
Answer: Corn Plant C
HOPE THIS HELPS
STAY SAFE
-Carrie
P.S. It would mean a lot if you marked brainliest <3
Science question!! Please help
Answer:
It lasted two hours or 120 minutes, it would be smart to say that he was riding up it during the interval 20-60min and riding down it during the interval 60-80min. This is an assumption made because of his speed, when going up a hill our speed is slower while when riding down it, you gain a lot of speed.
An electric field around two charged objects is shown.
Two spheres next to each other. Vectors perpendicular to each surface spread out and go to the other charge. The vectors are from the charge on the left, labeled X, and to the other charge, labeled Y. The vectors on the opposite sides of the charges are not bent.
What are the charges of objects X and Y?
Answer: D
X: positive
Y: negative
Explanation:
It's either A or D and I chose A and got it wrong.
Answer:
D) Y and Z are opposite charges, but their identities cannot be determined.
Explanation:
i got it right
Fish are able to acquire the oxygen needed for respiration under water using gills. This is an example of which type of adaptation?
Answer:
Structural
Explanation:
Structural adaptations are a change to a organism's body, gills are part of the fish's body which would be why this is a structural adaptation!
Hope this helped! Stay safe have a good day or night!
What is the resistance for each resistor? What is the voltage of the battery?
Answer:
Each resistor has a resistance of 10.0 ohms. The battery has a voltage of 9.0 volts.
Explanation:
edmentum
Which of the following terms is NOT part of a major chord?
A) Tonic
B) Platonic
C) Dominant
Answer: Option B.
Explanation:
In the major chord, the tonic is the "rest" note, this is the root of the chord, for example, in E major, E is the tonic.
Dominant is the note with more "strength" in the chord, is the fifth degree in the chord, for example in the C major chord, the dominant will be G.
Then the correct option is B, platonic.
Scientists studying a region in southern Florida have noticed drastic changes in the availability of freshwater. Which of the following probably did NOT contribute to these changes? A. Several years of declining rainfall B. Decrease in the population of pond plants C. Building of new homes in the area D. Construction of a dam on the local river
Answer:
C. Building of new homes in the area
I'm not totally sure but I think this is the best answer.
A boy of 65 kg is skating around a circle with radius 3.8
meters. If he is moving at 4.25 m/s, what is his angular
momentum? (Round to the nearest hundredth).
A 1049.75 Nms
B 27.63 Nms
C 276.25 Nms
D 10.50 Nms
E 104.98 Nms
Answer:
A 1049.75
Explanation:
notice that a Nms is equal to a kg(m^2)/s which is what you get if multiply all three given values.
the formula is angular momentum = (mass)(velo)(radius)
therefore
65(3.8)(4.25) = the answer
= 1049.75
In a landfill, old biodegradable materials are breaking down while at the same time, new trash is being added daily. Which statement describes the relationship between a landfill and the mass of the Earth?
A.) The mass of the Earth increases and decreases depending on the amount of trash added to the landfill.
B.) The mass of the Earth decreases due to materials breaking down in the landfill.
C.) The mass of the Earth increases due to trash being added to the landfill.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
Answer:
Ok, first, what is trash?
Trash can be different things, like organic stuff (remains of fruit or wood) or not-organic (like plastic)
Naturally, those things come from Earth, meaning that that:
The fruit is on Earth.
Someone eats the fruit
the rest is trowed in the trash
the trash is returned to some location on the Earth.
So the mass of the fruit is always in the Earth, this means that the mass of the Earth does not change by this process.
Now in the process of materials breaking down, those materials are being "absorbed" by the land, so the mass remains on the planet, this process also does not change the mass of the Earth.
D.) The mass of the Earth remains the same regardless of the amount of trash in the landfill.
Based on the law of conservation of energy hiw can we reasonably improve a machines ability to do work
Two chickens are bred and produce the following numbers of offspring. What are the most likely appearances of the parents?
Table of offspring
A. Both parents have red/white feathers.
B. Both parents have white feathers.
C. One parent has white feathers, and one parent has red/white feathers.
D. One parent has white feathers, and one parent has red feathers.
Answer:
Well, Your best answer will be is C. One parent has white feathers, and one parent has red/white feathers.
GOOD LUCK!~
[tex]^{By[/tex][tex]^{Itsbrazts[/tex]
Answer:
c
Explanation:
25 POINTS !!!! PLS HELP
Answer:
G
Explanation
The acceleration of gravity is constant, and = 9.8 m/s² , no matter what mass of the object is. Initial speed for both objects = 0 m/s. So, after 2 sec the objects will have the same speed and the same distance.
Answer G: speed=v, distance =d.
What kind of friction is occurring between a pencil and desktop when you flick the pencil?
Rolling friction
Fluid friction
Static friction
Sliding friction
A car veers off course and runs straight into a brick wall. This is an example
of which of the following?
A. long time, large force
B. long time, small force
C. short time, small force
D. short time, large force
Answer:
Short time large force
The shock from an electric fence would be the least unpleasant if you were
standing
A. on dry, thick gravel
B. in tall grass
C. In wet grass
OD. near the livestock
Answer: on dry , thick gravel
Explanation:
which animal is prey to an owl in the food web pictured here?
Answer is D: mouse
explanation: not sure
Explanation: Usually in food webs there is an arrow going from the prey to its predator that shows the transfer of energy so that is how you know what the prey to the owl is
hope this helps
Answer:
MOUSE
Explanation:
A few Physics questions regarding circuits and electricity.
Answer:
7.series
Explanation:
in parallel is like if one bulb stops work all the others will stop too
in series it remains constant or it wont change throughout a series circuit
The diagram shows the field lines near the poles, X and Y, of two magnets.
At left a rectangular box with the long horizontal side labeled X. At right a rectangular box with the long horizontal side labeled Y. There is a gap between the boxes. Curved lines with arrowheads emerge from the right end of X and the left end of Y and point up and down.
Based on the field lines, what are the poles of the magnets?
X: north
Y: south
X: south
Y: north
X: north
Y: north
X: south
Y: south
Answer: I think it is C
Explanation: sorry if it wrong
Answer:
C
Explanation:
got it right on edge
Increase in greenhouse gases in the atmosphere leads to climate change because these gases have what property?
A. They absorb infrared radiation
B.They transit visible light
What will happen when the force on an object increase
The orbital radius of the Earth (from Earth to Sun) is 1.496 x 10^11 m.
Mercury's orbital radius is 5.79 x 10^10 m and Pluto's is 5.91 x 10^12 m.
Calculate the time required for light to travel from the Sun to each of the
three planets.
a. Sun-Earth:_______
b. Sun-Mercury:________
c. Sun-Pluto:________
Explanation:
The orbital radius of the Earth is [tex]r_1=1.496\times 10^{11}\ m[/tex]
The orbital radius of the Mercury is [tex]r_2=5.79 \times 10^{10}\ m[/tex]
The orbital radius of the Pluto is [tex]r_3=5.91 \times 10^{12}\ m[/tex]
We need to find the time required for light to travel from the Sun to each of the three planets.
(a) For Sun -Earth,
Kepler's third law :
[tex]T_1^2=\dfrac{4\pi ^2}{GM}r_1^3[/tex]
M is mass of sun, [tex]M=1.989\times 10^{30}\ kg[/tex]
So,
[tex]T_1^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 1.496\times 10^{11}\\\\T_1=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times1.496\times10^{11}}\\\\T_1=2\times 10^{-4}\ s[/tex]
(b) For Sun -Mercury,
[tex]T_2^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 5.79 \times 10^{10}\ m\\\\T_2=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times 5.79 \times 10^{10}}\ m\\\\T_2=1.31\times 10^{-4}\ s[/tex]
(c) For Sun-Pluto,
[tex]T_3^2=\dfrac{4\pi ^2}{6.67\times 10^{-11}\times 1.989\times 10^{30}}\times 5.91 \times 10^{12}\\\\T_3=\sqrt{\dfrac{4\pi^{2}}{6.67\times10^{-11}\times1.989\times10^{30}}\times 5.91 \times 10^{12}}\\\\T_3=1.32\times 10^{-3}\ s[/tex]
