Answer:
4:10
Explanation:
2. A hammer hits a nail with a force of 50 N into some wood. The area of the point of the nail is 0.02 cm2. What is the pressure the nail puts on the wood?
What is the pressure the nail puts on the wood?
Answer:
hmmdndbdjjdjdhdjejjejdjdhdudududjhdhdhdhd
I hope this helps.......
Apart from physical factors, what other environmental factors are in your environment?
Answer:
Explanation:
Factors which affects and impacts our environment may include water, sunlight, buildings and so many other. The factors which can touched are called the physical factors. The physical factirs include buildings, humans and so on. Other factirs which aren't physical inckide the the effects posed to the environment t by biological and chemical factirs which may include, the impacts in sunlight and Rainfall, the pH and so on.
The smallest bird is the Cuban bee hummingbird, which has a mass of only 1.7 g. If this bird did 8.8 10 –4J of work by exerting an upward force of 3.4 10 –4 N, how far did it fly?
Answer:
The distance the bird flew is approximately 2.59 meters
Explanation:
We list out the parameters in the question, and the required measurement as follows;
The mass of the Cuban bee hummingbird, m = 1.7 g = 0.0017 kg
The amount of work the bird does, W = 8.8 × 10⁻⁴ J
The amount of upward force the bird exerts, F = 3.4 × 10⁻⁴ N
Let 'd' represent the distance flown by the bird
(The downward force, [tex]F_g[/tex] = The weight of the bird, W
W = The mass of the bird, m × The acceleration due to gravity, g
The acceleration due to gravity, g ≈ 9.81 × 10 m/s²
∴ [tex]F_g[/tex] ≈ 0.0017 kg × 9.81 m/s² = 0.016677 N > F)
Given that the weight of the bird is larger than 'F', we assume that the force exerted by the bird is the net force, [tex]F_{NET}[/tex] = F
Therefore;
Work done, W = Net Force, [tex]F_{NET}[/tex] × Distance, d
∴ W = [tex]F_{NET}[/tex] × d
d = W/[tex]F_{NET}[/tex] = 8.8 × 10⁻⁴ J/(3.4 × 10⁻⁴ N) = 2.58823529 meters
The distance the bird flew, d ≈ 2.59 m.
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (40pts)
Answer:
Ok
Explanation:
Speed
A 40 kg shell is flying at a speed of 72 km/h. It explodes into two
pieces and one piece with a mass of 15 kg stops. The velocity of the
other piece will be 32 m/s.
true or false?
Answer: This is true
Explanation: v2=800/25= 32m/s
What is the cause of the falling surface temperatures of the Pacific Ocean?
Answer:
The primary cause of rising SST levels worldwide is climate warming due to excessive amounts of greenhouse gases being released into the atmosphere. Heat from the warming atmosphere raises the temperature of the sea surface. ... Water expands as it warms and the increased volume causes sea level rise.
Explanation:
I think so, sorry if wrong
20 POINTS PLSSS!!!!!! I WILL MARK YOU AS BRAINLIEST!!!!
1: When given a motion graph, how can you tell if it’s a speed graph or acceleration graph?
2: A plane takes 8 hours to fly 5000 km. What is its speed?
QUICK WILL GIVE BRAINLIEST EDG 2021
What is the best prediction for what will happen when all of the hydrogen in the sun has undergone fusion?
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Helium nuclei will split to form hydrogen and the sun will continue to release energy.
Helium nuclei will fuse to create heavier elements but the sun will no longer release energy.
Helium nuclei will fuse to crazy heavier elements and the sun will confuse to release energy.
Answer:
Helium nuclei will split to form hydrogen and the sun will no longer release energy.
Explanation:
:)
When all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
What is nuclear fusion?The term nuclear fusion has to do with the combination of two or more nuclei to obtain a larger nuclei with the emission of a tremendous amount of energy.
Hence, when all the hydrogen in the sun has gone for fusion, helium nuclei will split to form hydrogen and the sun will continue to release energy.
Learn more about fusion:https://brainly.com/question/12701636
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Which parts of the electric circuit considered as fuse
Answer:
Rewirable or Kit – Kat Type Fuses are a type of Low Voltage (LV) Fuses. They are most commonly used in house wiring, small industries and other small current applications. Rewirable Fuses consists of two main parts: a Fuse Base, which contains the in and out terminal, and a Fuse Carrier, which holds the Fuse Element.
https://youtu.be/f_kgUUaMZlw
High energy waves have what
Answer:
It means that the frequency will be a lot higher with a shorter wave.
1. What is the kinetic energy of a 94 kg basketball player running at 7.3 m/s?
2. What is the velocity of a truck that has a mass of 2288 kg and 432,000 J of kinetic energy?
Help greatly appreciated.
Use the links to answer the question.(I mean, you don't HAVE to if you prefer not to if you have already found the answer or would prefer to look it up yourself).
#1: http://www.seasky.org/space-exploration/astronomers-isaac-newton.html
#2: https://www.space.com/newtons-laws-of-motion-explained.html
#3: https://www.universetoday.com/91785/isaac-newton/
Write a short 6 sentence summary answering this: How did Newton alter the Solar System model proposed by Kepler and what other contributions did he make to Astronomy?
Thank you all for helping me! you saved my grade by a lot!
Answer:
If Kepler’s laws define the motion of the planets, Newton’s laws define motion. Thinking on Kepler’s laws, Newton realized that all motion, whether it was the orbit of the Moon around the Earth or an apple falling from a tree, followed the same basic principles. “To the same natural effects,” he wrote, “we must, as far as possible, assign the same causes.” Previous Aristotelian thinking, physicist Stephen Hawking has written, assigned different causes to different types of motion. By unifying all motion, Newton shifted the scientific perspective to a search for large, unifying patterns in nature. Newton outlined his laws in Philosophiae Naturalis Principia Mathematica (“Mathematical Principles of Natural Philosophy,”) published in 1687.
Law I. Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed theron.
In essence, a moving object won’t change speed or direction, nor will a still object start moving, unless some outside force acts on it. The law is regularly summed up in one word: inertia.
Law II. The alteration of motion is ever proportional to the motive force impressed; and is made in the direction of the right line in which that force is impressed.
Newton’s second law is most recognizable in its mathematical form, the iconic equation: F=ma. The strength of the force (F) is defined by how much it changes the motion (acceleration, a) of an object with some mass (m).
Law III. To every action there is always opposed an equal reaction: or the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.
As Newton himself described: “If you press a stone with your finger, the finger is also pressed by the stone.”
Explanation:
Hope this helps I cant say what I wrote is 100% correct so use at your own risk.
A wave with a frequency of 10 Hz and wavelength of 12m has what velocity?
The equations you will need:
v = λ x f λ=v/f f=v/λ
Answer:
120
Explanation:
lambda = 12
f=10
10×12=120
In a head on collision, if you aren’t wearing your seatbelt you could go through the window. What Law is being applied?
Answer:
inertia
..............
Answer:law of inertia
Explanation:
6. A guitar has six strings of the same length. The thickness or mass of the strings is different and each string has a different pitch and frequency. Explain why the mass of the string affects the frequency of the wave. (Hint: Think about how force, mass, and acceleration are related.)
a bit confused on this last question...
You can download answer here
tinyurl.com/wtjfavyw
An unknown element has 5 protons, 5 electrons, and 6 neutrons what is the atomic mass of this element
Answer:
Atomic mass 5
Explanation:
No. protons=Atomic mass
An object has a velocity of 9 m's and a mass of 20 kg. What is the kinetic energy of the object? A 90 J C. 810 J B 180 J D. 1,620 )
Answer:
K=1/2mv^2=(20x81)/2=810J
what causes mechanical waves?
A bus as speed of 20m/s begin to slow at constant acceleration of 8.00m/s2 along a straight line find the average speed for the 5al.S interval
Answer:
the final velocity of the bus is -20 m/s.
Explanation:
Given;
initial velocity of the bus, u = 20 m/s
deceleration of the bus, -a = 8 m/s²
time of motion, t = 5 s
The final velocity of the bus is calculated as;
v = u + at
v = 20 + (-8 x 5)
v = 20 - 40
v = -20 m/s.
Therefore, the final velocity of the bus is -20 m/s.
Which object has the most thermal energy?
A. A 10 kg rock at 10°C
B. A 6 kg rock at 15°C
C. A 10 kg rock at 15°C
D. A 6 kg rock at 10°C
Answer:
10 kg rock at 15 degrees
Explanation:
did test
Hurry need help ASAP
Answer:
last one
Explanation:
How does a parallel circuit change when a branch is added? The total resistance increases, so the current in the circuit decreases. The total resistance decreases, so the current in the circuit increases. The total resistance increases, so bulbs shine at a lower brightness. The total resistance decreases, so bulbs shine at a higher brightness.
Answer:
i know i'm way late. i'm so sorry but the answer is b not c. i just took the test and got 90% this one is wrong. it's B
Explanation:
just took the test.
hope this helps!
have a good day/ night
When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.
What is meant by a parallel circuit ?A parallel circuit is defined as the type of circuit in which the resistors are connected in parallel such that the current flowing through each of them is different.
Here,
The given circuit is connected in parallel combination of resistors. The current has different pathways to flow through. The voltage applied across each resistors will be the same.
Consider a parallel resistance circuit having a combination of n number of resistors with resistance R. The effective resistance of the parallel circuit can be given as,
1/Reff = 1/R₁ + 1/R₂ + 1/R₃ +....1/Rₙ
Since, the resistance is same on all resistors, we can write,
Reff = R/n
So, when adding a branch, the number of resistors, n increases. As a result, the effective resistance of the circuit decreases.
According to Ohm's law, as the resistance of a circuit decreases, the flow of current through the circuit increases.
Hence,
When a branch is added to a parallel circuit, the total resistance decreases, so the current in the circuit increases.
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Which is not a step in the scientific method?
a. Problem or question
b. Ask other people for their opinion
O c. Formulate a hypothesis
O d. Arrive At a conclusion
HURRY PLEASE
Answer:
Umm I'm pretty sure is all of the above
PLEASE HELP!!! GIVING BRAINLIEST!! ill also answer questions that you have posted if you answer these correctly!!!! (77pts)
Answer:
Ex.
1. When we try cycling when we push the padel cycle starts but if we do not push the padels the cycle will stop on one position........
1.Two materials that can be scratched by an iron mail are ___, ___
2.What is the substance that can be scratched by an iron nail but not a penny?
Please answer
Answer:
1. Two materials that can be scratched by an iron nail are zinc and aluminum
2. A substance that can be scratched by an iron nail but not a penny is;
Nickel
Explanation:
The hardness of a material can be defined as its ability to resist being plastically deformed at a location due to mechanical scratching, abrasion or indentation
The Mohs hardness scale provides a ranking of materials in the order of hardness with a material having a higher Mohs hardness number being able to scratch other materials which have a lower Mohs hardness number
1. From the Mohs scale of hardness, iron which has an harness number of 4.5 can scratch zinc which has an harness number of 2.5, and iron can also scratch aluminum which has an hardness number of 2.5 to 3
2. A penny is made from copper plated material and will have an outer layer hardness of copper which has an hardness number of 3 on the Mohs scale
Therefore, a penny cannot scratch a material mode of nickel which has an hardness number of 4, while iron which has an hardness of 4.5 will scratch a nickel material
(1) Zinc and aluminum can be scratched by an iron nail.
(2) Nickel can be scratched by an iron nail but not a penny.
Hardness and deformation:The hardness of a material is defined as its ability to resist deformation due to mechanical scratching, abrasion, or indentation.
According to the Mohs hardness scale, a material having a higher Mohs hardness number is able to scratch other materials which have a lower Mohs hardness number.
From the Mohs scale of hardness, iron has a hardness number of 4.5, zinc has a hardness number of 2.5, and aluminum which has a hardness number between 2.5 to 3. So, iron can scratch both, Zinc and Aluminium.
A penny is made from copper-plated material copper has a hardness number of 3 on the Mohs scale. Whereas Nickel has a hardness number of 4. Therefore, a penny cannot scratch a material made of Nickel.
Learn more about hardness:
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What is the magnitude and direction (right or left) of the
net force acting on the box?
______ N to the _______
Answer:
12 N to the Right
Explanation:
12 N is the answer for the first box and right is the answer for the second box
What is a disadvantage of using biomass as an energy resource?
A. Biomass produces a less efficient fuel
B. Biomass is available almost everywhere
C. Biomass is a renewable energy resource
D. Biomass releases less harmful emission gases
Answer:
hope this helps i think the answer is C
Answer:
it is A) biomass produces a less efficent fuel
Explanation:
the rest are advantages
A person whose mass is 80 kg has a surface area on one foot of 0.05 m2. What pressure does the person exert on the ground if standing on both legs?
P=F/A
A=foot1+foot2
A=0.05m2+0.05m2 because it says by two foot
A=0.10m2
>>F=mg=80kg*9.81m/s2=784.8N
P=784.8N/0.10m2
P=7848Pa
A roller skater of 47kg moving with a velocity of 12 m/s to the east picks up a bag of 6.0 kg. What is the final velocity of the person traveling with the basket? show your work HINT: Use the law of conservation of momentum in the perfectly inelastic collision m1v1i + m2v2i = (m1+m2) vf
plz guys i have exam now answer her quikly
Answer:
v_f = 10.85 m/s
Explanation:
We will apply the law of conservation of momentum here:
[tex]m_{1}v_{1i} + m_{2}v_{2i} = m_{1}v_{1f}+m_{2}v_{2f}\\[/tex]
where,
m₁ = mass of roller skater = 47 kg
m₂ = mass of bag = 6 kg
v_1i = initial speed of roller skater = 12 m/s
v_2i = initial speed of the bag = 0 m/s
v_1f = final speed of the roller skater = ?
v_2f = final speed of the bag = ?
Both the bag and the skater will have same speed at the end because kater is carrying the bag:
v_1f = v_2f = v_f
Therefore, the equation will become:
[tex](47\ kg)(12\ m/s)+(6\ kg)(0\ m/s)=(47\ kg)(v_{f})+(5\ kg)(v_{f})\\564\ N.s = (47\ kg+5\ kg)(v_{f})\\v_{f} = \frac{564\ N.s}{52\ kg}\\[/tex]
v_f = 10.85 m/s
why is the sun considered as the prime source of heat energy ?
Answer:
The Sun is the Ultimate Source of Energy. Every morning the sun rises, bringing light and heat to the earth, and every evening it sets. ... Plants convert light energy from the sun into chemical energy (food) by the process of photosynthesis. Animals eat plants and use that same chemical energy for all their activities.