Answer:
The atomic mass of an atom that has 5 protons and 7 neutrons would be 12.
Explanation:
In all cases, the number of protons added to the number of neutrons equate to the mass of an atom. Electrons do have mass, but it's so miniscule and insignificant that it doesn't contribute to the overall mass of the atom, so there's no need to count them.
Bonus Information:
DO NOT CONFUSE MASS WITH CHARGE! Protons and neutrons are the only particles that contribute to the mass of an atom. Meanwhile, protons (+) and electrons (-) are the only particles that have a charge. As it says in its name, neutrons are neutral or have no charge.
Remember:
C = p - e
M = p + n
C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons
I hope this helps!
Which statement best describes scientific laws? (2 points)
O Scientific laws are scientists' opinions of why events occur.
Scientific laws are facts that describe observed reoccurring natural events.
Scientific laws explain why natural events occur.
Scientific laws were theories that have been proven to be true.
Answer:
Scientific laws are facts that describe observed reoccurring natural events.
Explanation:
Scientific laws are explanations for the behavior of the natural world. Scientific theories are explanations for scientific laws.
PLEASE HELP 100 POINTS!!!!!
Study this image of the process of photosynthesis. What’s wrong with the image?
A. Sun rays are shown on the right side of the image.
B. Carbon dioxide is shown as an input.
C. Oxygen is shown as an input.
D. Water is shown as an input.
Answer:
C
Explanation:
Carbon dioxide should be the input, and oxygen should be the output.
Answer:
c
Explanation:
i got it right :D
Which object is most efficient?
a. A heat engine that produces 30 J of work for 60 J of input energy.
b. A heat engine that produces 15 J of work for 30 J of input energy.
c. A heat engine that produces 20 J of work for 60 J of input energy.
d. A heat engine that produces 40 J of work for 50 J of input energy.
Answer:
It is b
Explanation:
A rock is thrown horizontally from a building at 15 m/s. It hits the ground 45 m from the base of the building. How high was the building?
Answer:
Explanation:
hope this helps!
An owl has a mass of 4.00 kg. It dives to catch a mouse, losing 800.00 J of its GPE. What was the starting height of the owl, in meters?
Answer:
height =20m
Explanation:
gpe=mgh
800=4×10×x
40x=800
x=20
4. A car, initially traveling east with a speed of
5.0 m/s, is accelerated uniformly at 2.0 m/s2 east for
10 s along a straight line. During this 10 s
interval the car travels a total distance of
A. 50 m
B. 60 m
C. 100 m
✓ D. 150 m
Answer:
150 m
Explanation:
Given,
u=5m/s
a=2m/s2
t=10s
v=?
s=?
Now,
v=u+at
=5+2×10
=5+20
=25m/s
So,
s=u+v/2×t
=5+25/2×10
=30/2×10
=15×10
=150m
A bus approaches red traffic light, and slows down from a speed of 15
m/s to rest in 3 seconds. What is the average acceleration (in m/s)?
Answer:
-5
Explanation:
-15/3
Put them in order to smallest to largest: centimeter, femtometer, kilometer, light year, meter, nanometer
A spacecraft orbiting Earth is both moving forward and
a. at terminal velocity
b. experiencing resistance
c. weightless
d. towards earth
Answer: (A) At terminal velocity ...
Explanation:
Please explain the different ways offense can score and how many points each way is worth? Answer in complete sentences.
Answer:
what sport bruh
Explanation:
Answer:
in wat sport exactly
Explanation:
in eat sport
Best Answer gets Brainiest
Draw the (Quantitative) velocity vs time graphs for an object whose motion produced the position vs time graphs in the graphs below. Show your work.
Answer:
yoo yoo
24
Explanation:
HELLO PLEASE HELPPP!! WILL GIVE BRAINIEST
Answer: Wavelength
Explanation:
Answer:
C) wavelength
Explanation:
I hope this is right, have a nice day!
A map of earthquakes and volcanoes on Earth shows that they do not occur in evenly distributed areas, but they also do not occur randomly over Earth's surface. Describe what GPS measurements show about the distribution of locations where earthquakes and volcanoes occur.
Distinguish between average speed and average
velocity
Answer:
The average speed of an object is defined as the distance traveled divided by the time elapsed. Velocity is a vector quantity, and average velocity can be defined as the displacement divided by the time.
Which of the following is strenuous?
Atraining for an athletic competition
Bsharing a candy bar with a friend
Creading an exciting mystery
Dforgetting to complete your homework
Answer:
I think it c
Explanation:
Answer:
Atraining for an athletic competition
What can affect the properties of a substance?
A. Only the arrangement of atoms
B. Only the types of atoms
C. Neither the arrangement nor the types of atoms
D. The arrangement and types of atoms
I have been trying to do number 2 and I just don’t know what the answer is if you can help me thank you so mush
Answer:
Strong Positive Linear Line Correlation
Explanation:
According to the diagram, there is a strong positive linear line correlation between velocity and distance of galaxies. Hubble showed that galaxies are receding away from people with a velocity that is proportional to their distance from people more distant galaxies recede faster than nearby galaxies.
About the diagram: Velocity is the distance relation among extra-galactic nebulae. Radial velocities is corrected for solar motion, are plotted against distances estimated from involved stars and mean luminosities of nebulae in a cluster. The black discs and full line represent the solution for solar motion by using the nebulae individually; the circles and broken line represent the solution combining the nebulae into groups; the cross represents the mean velocity corresponding to the mean distance of 22 nebulae whose distances could not be estimated individually.
a compass needle acts as a(n)
Explanation:
A compass needle acts as a Magnet
Two pieces of evidence for plate tectonics?
Explanation:
fossil and glaciers is the to pieces of evidence
Choose the answer to fill in the blank, which best completes the sentence.
Choice of medium allows the artist to ________________
a.
convey different messages.
b.
experiment with combining materials to create new media.
c.
reconnect with old forms of art.
d.
improve realism in art, particularly with portraits.
Answer:
A on edge 2020
Explanation:
Answer:
a. convey different messages.
Explanation:
Got it on edge just took the test.
Which list places the layers of the sun in the correct order from innermost to outermost?
Corona, photosphere, chromosphere
Photosphere, convective zone, radiative zone
Convective zone, chromosphere, corona
Radiative zone, corona, convective zone
Answer: The answer is A, Corona, Photosphere, Chromoshpere
Explanation:
Just took the test
The Photosphere, Chromosphere, Transition Region, and Corona are the outer layers. Option A is correct.
What are the layer of sun?Corona, photosphere, chromosphere are the layers of the sun in the correct order from innermost to outermost.
The distance is measured from the sun's core for the inner layers and from the sun's surface for the outer layers. The Core and Convection Zone, are the inner layers.
The Photosphere, Chromosphere, Transition Region, and Corona are the outer layers.
Hence, option A is correct.
To learn more about the layer of sun, refer to the link;
https://brainly.com/question/16202855
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Phich instrument can be used to give a direct measurement of the mass of a rock on moon
Answer:
you can use a balance
Explanation:
when you tend to measure something you are using your brain so why dont you use your brain dimwitt
The input work done on a machine is 9.63 × 103 joules, and the output work is 3.0 × 103 joules. What is the percentage efficiency of the machine?
Answer:
31.15%
Explanation:
The formula used was
((Work output)/(Work input))×100
Answer:
C. 31.1 percent
How long does it take for light to travel 1m? and a 1mm?
Answer:
Hi. U should do like this
Answer:
3.335641 nanoseconds for meters
An 856 kg drag race car accelerates from rest to 105 km/h in .934s. What change in momentum does the force produce? Answer in units of kg • m/s
Part 2: what average force is exerted on the car? Answer in N
Hello!
Topic: Dinamic
Value to calculate: Force
First, we have to calculate the aceleration, for that, lets aplicate the formula:
[tex]\boxed{a=\frac{V-Vi}{t} }[/tex]
How the final velocity is in km/h, we have to convert it on m/s, so:
m/s = km/h / 3,6
m/s = 105 / 3,6
m/s = 29,16
Then, lets replace formula according problem information:
[tex]a = \dfrac{29,16m/s-0m/s}{0,934s}[/tex]
[tex]a =31,22\ m/s^{2}[/tex]
Now, how we have the aceleration, lets applicate second law of newton for calculate the force produced:
[tex]\boxed{F=ma}[/tex]
Replace and resolve it:
F = 856 kg * 31,22 m/s^2
F = 26724,32 kg * m/s^2
Then the force is of 26724,32 kg * m/s^2
But how we know an 1 kg * m/s^2 = 1 N
Then the average of the force is of 26724,32 N
(1) The change in momentum of race car is 89880 kg-km/h.
(2) The average force exerted on the car is of 96231.26 N.
Given data:
The mass of race car is, m = 856 kg.
The initial speed of car is, u = 0 km/h.
The final speed of car is, v = 105 km/h.
The time interval is, t = 0.934 s.
1)
The change in the impact due to average force is known as momentum change. The expression for the change in momentum is given as follows,
[tex]\Delta P = m(v-u)[/tex]
Solving as,
[tex]\Delta P = 856 \times (105-0)\\\\\Delta P = 89880 \;\rm kg.km/h[/tex]
Thus, we can conclude that the change in momentum of race car is 89880 kg-km/h.
2)
Now, use the concept of impulse-momentum which says that the impulse is equal to change in momentum. Which means,
[tex]I = \Delta P[/tex]
And impulse is,
[tex]F \times t = \Delta P\\\\F = \dfrac{\Delta P}{t}[/tex]
Solving as,
[tex]F = \dfrac{89880}{0.934}\\\\F = 96231.26 \;\rm N[/tex]
Thus, we can conclude that the average force exerted on the car is of 96231.26 N.
Learn more about the impulse-momentum theorem here:
https://brainly.com/question/14121529
The block in the drawing has dimensions L0×2L0×3L0,where L0 =0.5 m. The block has a thermal conductivity of 300 J/(s·m·C˚). In drawings A, B, and C, heat is conducted through the block in three different directions; in each case the temperature of the warmer surface is 37 ˚C and that of the cooler surface is 8 ˚C Determine the heat that flows in 3 s for each case.
The drawing showing the block is missing, so i have attached it.
Answer:
Q_p = 19575 J
Q_o = 8700 J
Q_g = 78300 J
Explanation:
We are given L0 = 0.5 m
From the image, we can see that;
Length; L = 3L0 = 3 × 0.5 = 1.5 m
Width; W = L0 = 0.5 m
Height; H = 2L0 = 2 × 0.5 = 1 m
Temperature of warmer surface; T_h = 37 ˚C
Temperature of cooler surface; T_l = 8 ˚C
thermal conductivity; k = 300 J/(s·m·C˚)
Time for which the heat flows; t = 3 s
Now, from Fourier's law of conduction, the rate of heat flow is given by;
Q/t = kA(dT/dx)
Where;
A is area
dt is change in temperature = 37 - 8 = 29°C
dx is perpendicular distance
Now, for the amount heat flow perpendicular to the pink surface, from the image dx will be the height 1 m.
Thus;
Q_p/3 = 300 × (1.5 × 0.5) × (29/1)
Q_p/3 = 6525
Q_p = 3 × 6525
Q_p = 19575 J
for the amount heat flow perpendicular to the orange surface, from the image dx will be the length 1.5 m.
Thus;
Q_o/3 = 300 × (1 × 0.5) × (29/1.5)
Q_o/3 = 2900
Q_o = 2900 × 3
Q_o = 8700 J
for the amount heat flow perpendicular to the green surface, from the image dx will be the width 0.5 m.
Thus;
Q_g/3 = 300 × (1 × 1.5) × (29/0.5)
Q_g/3 = 26100
Q_g = 26100 × 3
Q_g = 78300 J
This player along with the point guard, are considered the leaders of the team.
basketball
Answer:
Shooting guard I think
Explanation:
Answer:
the center
Explanation:
i had it on my test
An object is dropped into a beaker containing liquid the object drops to the bottom of the beaker therefore
An object is dropped into a beaker containing liquid the object drops to the bottom of the beaker therefore the density of the object is greater than that of liquid inside the beaker.
What is density?The density of a substance indicates how dense it is in a given area. Mass per unit volume is the definition of a material's density. In essence, density is a measurement of how closely stuff is packed. It is a particular physical characteristic of a specific thing.
The Greek scientist Archimedes made the discovery of the density principle. The letter D can also be used to signify density instead of the symbol ρ .
According to Archimedes principle, if an object is dropped into a beaker containing liquid the object drops to the bottom of the beaker, the density of the object is greater than that of the liquid inside the beaker.
Learn more about density here:
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Litmus paper strips were dipped in two different unknown liquids. The table below shows the pH of the two liquids: Litmus Test for Unknown Liquids Litmus Paper Strip pH of Liquid X 9 Y 4 What will happen to the litmus strips?
Answer:
Both will turn red
Both will turn blue
X will turn red and Y will turn blue
X will turn blue and Y will turn red
Answer:
X will turn blue and y will turn red
Explanation:
Since X has a pH of 9, it will turn blue because anything with a pH higher than 7 turns blue. Since Y has a pH of 4, it will turn red because anything with a pH lower than 7 turns red.
Who could explain the phenomenom of interference of light?
Answer:
When the waves reflected from the inner and outer surface combine they will interfere with each other, removing or reinforcing some parts of white light by destructive or constructive interference. ... This results in color.
Explanation:
this is what we studied
so basically there is like a surface
and 2 different waves coming out of the same source
they will combine and start removing parts of the white light (which originally consists of 6 to 7 colors)
results in showing these colors