Answer:
Stress = 4.67 * 10^-7 N/m²
Explanation:
Young's modulus of the material = Stress/Strain
Given
Young's modulus = 228 x 10^9 Pa
Stress = 106,483 Pa
Required
Strain
From the formula;
Strain = Stress/Young modulus
Strain = 106,483 /228 x 10^9
Stress = 4.67 * 10^-7 N/m²
A ball having a mass of 0.20 kilograms is placed at a height of 3.25 meters. If it is dropped from this height, what will be the kinetic energy of the ball when it reaches 1.5 meters above the ground?
A.
1.2 joules
B.
2.2 joules
C.
3.4 joules
D.
3.6 joules
E.
4.3 joules
Answer:
C.
3.4 joules
Explanation:
Answer for Plato and edmentum
Two persons (each on a skateboard) are initially standing still and facing each other before pushing off of each other. One person (50 kg) moves backwards at 1.1 m/s. Calculate the velocity of the second person (65 kg).
Answer:
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
Explanation:
Law Of Conservation Of Linear Momentum
The total momentum of a system of bodies is conserved unless an external force is applied. The formula for the momentum of a body with mass m and velocity v is:
P=mv.
If we have a system of bodies, then the total momentum is the sum of them all
[tex]P=m_1v_1+m_2v_2+...+m_nv_n[/tex]
If a collision occurs, the velocities change to v' and the final momentum is:
[tex]P'=m_1v'_1+m_2v'_2+...+m_nv'_n[/tex]
In a system of two masses, the law of conservation of linear momentum is:
[tex]m_1v_1+m_2v_2=m_1v'_1+m_2v'_2[/tex]
According to the conditions of the problem, two persons standing on a frictionless surface are initially at rest (v1=0, v2=0). Their masses are m1=50 Kg and m2=65 Kg. After the push, one person (say m1) moves backward at v1'=-1.1 m/s. We can calculate the speed of the other person by solving for v2':
[tex]\displaystyle v'_2=\frac{m_1v_1+m_2v_2-m_1v'_1}{m_2)[/tex]
Substituting:
[tex]\displaystyle v'_2=\frac{50*0+65*0-50(-1.1)}{65)[/tex]
[tex]\displaystyle v'_2=\frac{55}{65}[/tex]
[tex]v'_2=0.85 \ m/s[/tex]
The second person will have a velocity of 0.85 m/s in the opposite direction of the first person.
State the meaning of specific heat capacity of copper is 380 J/kg°C.
Answer:
Specific heat capacity means that in order to raise copper by 1C per kg, it needs 380J of heat energy.
The moon is significantly smaller than the sun. Why is the moon able to fully block the sun from our view on
Earth?
Answer:
The moon is 400x smaller but it's also 400x closer so it looks the same size even though it's not
Explanation:
To solve this we must be knowing each and every concept related to moon. Therefore, the moon is able to fully block the sun from our view on earth as it is 400 times.
What is moon?Any celestial object that revolves around a planet, such as the eight main planets, dwarf planets, or minor planets, is referred to as a moon. In order to distinguish the moon from other celestial bodies that circle other bodies, the term "natural satellite" may also be used to describe the moon.
The Galilean moons orbiting Jupiter, called after astronomer as well as discoverer Galileo Galilei, were the first moons found outside of the moon of Earth. The moon is significantly smaller than the sun. The moon is able to fully block the sun from our view on earth as the moon appears the same size despite the fact that it's 400 times smaller because it is 400 times closer and hence smaller.
Therefore, the moon is able to fully block the sun from our view on earth as it is 400 times.
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why do students in uganda need to study physics
Answer:
1.To acquire problem solving skills like simple repairs at home,simple instruction etc. 2. To acquire skills of operating and using equipments.Explanation:
I hope l helped you ❤❤❤Answer:
1. Ability of problem solving.
2. Physics gives u a job.
3. Physicists can become engineers.
4. Physics puts your math to use.
5. Physics is versatile.
6. Physics makes things possible.
When we dissolve a substance in water, a -------- is formed
Answer:
solution
Explanation:
Answer:
When a substance dissolves in water, you can’t see it anymore, it’s still there, but has mixed with the water to make a transparent liquid called a solution. The bonds in salt compounds are called ionic because they both have an electrical charge—the chloride ion is negatively charged and the sodium ion is positively charged.
Explanation:
__________ skids occur when you suddenly press too hard on the accelerator and the drive wheels lose traction.
Answer:
Power Skids
Explanation:
Power Skid like the question suggested, is a skid that occurs when you suddenly press too hard on the accelerator and the drive wheels lose traction. Power Skid is one of the 4 types of Skids. The other 3 includes;
Cornering skid
Blowout skid and
Braking skid.
Power skid occurs mostly as a result of insanely high speed and or acceleration,when the accelerator is pressed on too suddenly causing the vehicle to be driven beyond its capabilities, and then to skid, ultimately.
Which of the following will change the strength of a magnetic field?
1.increase speed
2.change the amount of electric current
3.remove atoms
4.it is always the same
2. change the amount of electric current
What happens if all the heat energy contained in a body is removed? and what will be it's temperature?Explain
Answer:
If all the heat energy contained in a body is removed and changes in its temperature is described below in detail.
Explanation:
It moves from a body at a greater temperature to a body at a cheaper temperature. All element survives as solids, liquids, or gases. The material can transfer from one station to another if warmed or cooled. When heat is provided to a body its heat increases: When a physical body, hard, liquid. When heat is provided is stopped to a body its temperature decline.
Boo help me please!!!!!!!
Answer:
??
Explanation:
A force of 0.8 newton causes a spring to extend by 4 cm. What is the spring constant?
20 N per meter
56 N per meter
32 N per meter
40 N per meter
Answer:
20 N per meter
Explanation:
k = Fe
f = 0.8N
e = 4cm change to m = 4 ÷ 100 = 0.04
0.8 ÷ 0.04 = 20 N per meter
Calculate the magnitude of the gravitational force between Goku with a mass of 62 kg and King Kai’s planet with a mass of 1.458x1015 kg if the distance between their centers of mass is 31 m.
Answer:
6227.866 N
Explanation:
F = G . m(goku) . m(planet) / d²
F = 6.674 x 10-¹¹ x 62 x 1.458 . 10¹⁵ / 31²
F = 6227.866 N
What is the velocity of a toy car that rolls 350 cm towards a wall in 4.8 seconds?
A. 0.73 cm/s towards the wall
B. 1,680 cm/s towards the wall
C. 354.8 cm/s towards the wal
l D. 72.9 cm/s towards the wall
Answer:
D. 72.9 cm/s towards the wall
Atoms have no electric charge because they
A. Have an equal number of charged and non charged particles.
B. Have neutrons in their nuclei.
C. Have an equal number of electrons and protons
D. Have an equal number of neutrons and protons
Atoms have no electric charge because they have an equal number of electrons and protons.
Explanation:
Atom is the smallest unit of matter.It is comprised of three subatomic particles: protons, electrons, and neutrons.Electrons are found outside the nucleus of an atom and are negatively charged.Protons are found inside the nucleus of an atom and are positively charged.Neutrons are found inside the nucleus of an atom and have no charge.They are electrically neutral because they have an equal number of protons and electrons.So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.
Learn more about atoms here:
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4. During which three months is the difference the same between average high temperature and average low temperature?
Answer:
1 Inch and 20 F
Explanation:
the diagram shows a force being applied to a lever to lift a heavy weight. What change would enable the heavy weight to be lifted with a smaller force
Move the force to the right.
Pollen is one celled, or unicellular. It is used for reproduction in many types of plants. The bee is collecting nectar and, while doing that, is transferring the very tiny pollen grains The bee and the flowering plant are multicellular organisms, but they both have many things in common with the unicellular pollen What is one feature NOT shared by all three! All are made of one or more cells. The cells of each contain genetic material The cells of each contain exactly the same parts A cell membrane controls what goes in and out of the cells 9 Hierarchical Organisation SA PREP ITEST PREP PAX 1-877.816-0808 PHONE 1-877.377.953 Read Our Blog Meet Our Teachers Privacy Policy O USA Testprep LC 2030 A Rights Reserved
Answer:
This question is unclear, however, the answer to the initial clear part is:
The cells of each contain exactly the same parts
Explanation:
Thee three organims/structures mentioned in this question are: bees, flowering plants and pollen. Based on the information provided in the question, they all contain one (unicellular) or more (multicellular) cells.
However, considering the fact that bees are made up of animal cells while pollen and flowering plants are made up of plant cells, the cells of each will not contain exactly the same parts. For example, bees do not have chloroplasts in their cells while flowering plants do.
1. A limiting factor for using nuclear energy is the
produced
O A. flooding
O B. pollution
O C. waste
O D. heat
Answer:
waste
Explanation:
took da test. nhgvgg
Two sound waves (wave X and wave Y) are moving through a medium at the same speed. If wave X has a greater frequency than wave Y, then wave X
Answer:
Wave X has a shorter wavelength.
Explanation:
The relation between the speed of a wave, its wavelength and frequency is given by :
[tex]v=f\lambda[/tex]
It can be seen that the relationship between the frequency and wavelength is inverse.
In this problem, it is mentioned that two sound waves (wave X and wave Y) are moving through a medium at the same speed. The frequency of wave X is greater than wave Y. Then it would mean that wave X have shorter wavelength than wave Y (due to inverse relation).
When you're super tired and you lose energy, what energy are you actually losing?
I said Physics class, but it's really for Science class.
Answer:
it is chemical energy
Explanation:
that is the energy used by our body, so it is the one that we will loose. and the energy that we gain is also chemical energy
how much kinetic energy does an object at rest have ?
Answer:
None
Explanation:
Because an object only has kinetic energy when in motion.
Answer:
0
Explanation
If its at rest there is no kinetic energy
HELP PLEASE!!!
a crane lifts a 3,000 kg beam of concrete from the ground to a height of 50 m. what work is being done on the concrete?
Answer:
1,470,000Joules
Explanation:
Work done = Force * distance moves in the direction of the force
Given
mass = 3000kg
distance = 20m
Get the force
F = mg
F = 3000(9.8)
F = 29400N
Get the work done
Work done = 29400 * 50
Work done = 1,470,000Joules
Hence 1,470,000Joules work has been done on the concrete
How do labels protect us at the grocery store? Will gove Brainliest to RIGHT answer :)
to guide us on where stuff are or what the stuff are called and used for
An elevator car has a mass of 750 kg, and its three passengers have a combined mass of 135 kg. If the elevator and its passengers ride to the ground floor, 20.7 m below, find the change in gravitational potential energy of the car and its passengers. Show all your work.
Answer:
The change in gravitational potential energy is -1.80x10⁵ J.
Explanation:
The change in gravitational potential energy is given by:
[tex] \Delta E_{p} = E_{p_{f}} - E_{p_{i}} [/tex]
[tex] \Delta E_{p} = mgh_{f} - mgh_{i} [/tex]
Where:
"i" is for final and "f" for final
m: is the mass
g: is the gravity = 9.81 m/s²
h: is the height
For the car and the passengers we have:
[tex] \Delta E_{p} = m_{T}g(h_{f} - h_{i}) = (750 kg + 135 kg)9.81 m/s^{2}(0 - 20.7 m) = -1.80 \cdot 10^{5} J [/tex]
The minus sign is because when the elevator car and the passengers are up they have a bigger gravitational potential energy than when they are in the ground.
Therefore, the change in gravitational potential energy is -1.80x10⁵ J.
I hope it helps you!
A. about 1.8
B. about 9.1
C. about 18.1
D. about 28.3
Please help me
Answer:(b)
Explanation:
Given
GK=16 units
KH=y units
using Sine rule
[tex]\frac{\sin G}{y}=\frac{\sin H}{16}\\\frac{\sin 30^{\circ}}{y}=\frac{\sin 62^{\circ}}{16}\\y=16\times \frac{\sin 30^{\circ}}{\sin 62^{\circ}}\\\\y=16\times \frac{0.5}{0.883}\\y=9.06\ \approx \ 9.1\ units[/tex]
write the chemical name and chemical formula for four hydrogens and two nitrogen
Answer:
2 moles of H2Nsuperscript(-) or NHsubscript2 , amide group!
I hope it will be useful.
A 4.0 kg object will have a weight of approximately 14.8 N on Mars. What is the gravitational field strength on M
Answer:
Gravitational field strength =weight/mass
Explanation:
14.8N/4.0kg
3.7N/kg
Two tougboats are toeing a ship each exerts a force of 6000N and the angle between the two ropes is 60 calculate the resultant force on the ship
Answer:
10392.30N
Explanation:
We proceed by computing the individual force exerted by the boats
For the first boat
The angle is 30 degree to the vertical
Hence
Force = F cos θ
F=6000 cos 30
F=6000*0.866
F=5196.15 N
Since the boats are two and also at the same angle and also exerting the same force
The Net force = 2*5196.15
Net force=10392.30N
A square tile having 50cm side is made to withstand a pressure of 200N/m^2 find out if a force of 45N can be applied on the tile
Explanation:
Given that,
Side of a square tile, a = 50 cm = 0.5 m
Pressure withstand by it, P = 200 Pa
We know that,
Pressure = force/area
[tex]F=P\times A\\\\=200\times (0.5)^2\\\\=50\ N[/tex]
It is the force that tile withstand is 50 N. The force applied upon the time is 45 N. As 45 N can be applied on the tile because 45 N < 50 N.
why is an inflated balloon likely to burst if you leave it near a window with the sun streaming in it?
Answer:
Because the plastic of the balloon will eventually get to such I heat the radiation from the sun would cause it to pop
Explanation:
that is my answer
Answer:
because the heat melts the rubber and when it does it pops when it gets to hot
Explanation: