Answer:
(below)Explanation:
A force is any action that tends to alter the state of rest or uniform motion motion of a body. This is essentially Newton's first Law of motion. Energy is a property of a system that is a measure of the capacity to do work. for example Potential, kinetic
Hope this helps!
A toy car of mass 2-kg travels along a horizontal surface with negligible friction at a speed of 1.0 m/s. The car then collides with a vertical wall. The wall applies a force of magnitude 20 N for 0.2 s on the toy car. Which of the following predicts the motion of the toy care immediately after the collision?
A: The speed of the car will increase, and the car will travel in the opposite direction.
B: The speed of the car will decrease, and the car will travel in the opposite direction.
C: The speed of the car will remain the same, and the car will travel in the opposite direction.
D: The car will stop and remain motionless.
Please show your work in finding the direction of motion - ie. please don't use common sense but rather show the applicable physics principles along with formulas to find the direction of motion.
Answer:
An experiment is conducted in which a cart travels across a horizontal surface and collides with a wall. Data collected from the experiment are used to create the graph of the cart's velocity as a function of time. All frictional forces are considered to be negligible. Which data from the graph should the student use to determine the direction of the net force exerted on the cart and the direction of the change in momentum of the cart from the time intervals of A to B?
Explanation:
As we know that
Force=dp/dt(Change in momentum/time)So
20N=dp/2dp=10N/sHence the speed of car will remain the same it won't affect the speedAs momentum from wall is more the ball will travel in opposite directionOption C is correct
What are the Fundamental units involved in pressure
Answer:
density and volume
Explanation:
density and volume
What is the relationship between amplitude and frequency of a wave?.
Answer:
Inversely proportional
Explanation:
The amplitude and frequency of a wave have an inverse connection, with the amplitude being inversely proportional to the frequency. As the frequency rises, the amplitude falls. As the frequency decreases, the amplitude increases.
How can an electrical current produce a magnetic field, and how can a magnetic field produce an electrical current?.
Answer:
As Ampere suggested, 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.
Explanation:
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Poisoner's Handbook Video
Questions
1. What are some symptoms of cyanide poisoning?
2. Describe the state of death investigation in the New York Medical Examiner's office/police department prior to the
hiring of Dr. Norris?
3. What famous hospital became the home of Norris lab?
Bellevue Hospital
4. In what ways did the local government officials (mayor, etc.) try to discourage Norris?
5. Morris believed that Prohibition had become a plague? Why did he refer to Prohibition as a "national experiment in
extermination'?
6. Why was the Standard Oil manufacturing plant referred to as the looney bin?
7. What is illuminating gas? Why was it responsible for more deaths in New York than measles and tuberculosis?
8. Radium was used in painting clock and watch faces because it glowed and make the numbers and hands illuminate
at night. These were worn by servicemen during the war. Women worked in the factories painting these time
pieces during war time. They were known as the radium girls. What effects did these girls experience as a results of
their exposure to radium?
9. What mineral does radium mimic? What effect does this have on the body?
10. Describe New York when the depression hit?
11. What did Prohibition promise that did not happen?
12. Who is Mike the Durable? How did he get this nickname?
Dizziness, Headache, Nausea, vomiting, rapid breathing, rapid heart rate, Restlessness and Weakness are the symptoms that shows poisoning of cyanide.
What are some symptoms of cyanide poisoning?Dizziness, Headache, Nausea and vomiting, Rapid breathing, Rapid heart rate, Restlessness and Weakness are the some of the symptoms of cyanide poisoning. Cynaide is a very dangerous and fast acting poison that leads to death if not treated on time.
So we can conclude that all above are the symptoms caused by cyanide poisoning.
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amplitude of superposition of two waves y1 = 5sinwt and y2 = 5coswt is
(2 Points)
a) 0
b) 5
c) 52
d) 10
along with explanation
Answer:
correct answer is a
Explanation:
For this exercise we must add the two oscillations
y_total = y₁ + y₂
y_total = 5 sin wt + 5 cos wt
y _total = 5 (sin t wt + cos wt)
the sine and cosine functions are related
cos (a +90) = cos a cos 90 - sin 90 sin a = - sin a
let's call
a= wt
let's substitute
y_total = 5 (-cos (wt +90) + cos wt)
the cosine function has the same value for +θ and -θ
cos θ = cos (-θ)
Thus
y_total = 0
correct answer is a
A Ford is traveling with a velocity of 15m/s, east, and is 200 m ahead of a Chevy traveling in the same direction at 20 m/s. How far will the Chevy travel before catching up to the Ford? Edit: nvm lol I found it
Answer:
Distance covered by Chevy before catching up to the Ford = 800 meters
Explanation:
From the graph attached,
A Ford starts with a velocity = 15 meter per second
Therefore, slope of the line representing the relation between the distance and time = [tex]\frac{\triangle s}{\triangle t}[/tex] = Velocity
Let the equation of the blue line,
y = m₁t + b
Where m₁ = slope of the blue line = speed of a Chevy
= 20 meter per second
b = y-intercept
y = 20t + 0 [Since, Chevy starts from the origin, b = 0]
y = 20t
Let quation of the red line,
y = m₂t + b
Where m₂ = Slope of the red line = 15 meter per sec
b = y-intercept = 200 m [Since Ford is 200 meters ahead of Chevy]
y = 15t + 200
Point where these lines will meet or the point where both the cars meet.
20t = 15t + 200
5t = 200
t = 40 seconds
Distance traveled by Chevy in 40 seconds = Velocity × Time
= 20 × 40
= 800 meters per seconds
A 1000 kg mass car moved in a straight, horizontal motion, with a speed of 20m / s, when it was involved in an accident. It was subjected for 0.1s to an intense force, coming to rest after that time interval, any time. is the mean value of the modulus of this resulting force?
Answer:
average value of the resulting force
Explanation:
The average module value of this resulting force is equivalent to 2.0. 10⁵ N.
The impulse of a force can be calculated by the product of the intensity of the force applied by the time interval in which it is applied -
I = F.Δt
Where,
F = Strength in Newtons
Δt = time interval in seconds
I = Impulse in N.s
The impulse of a force is equivalent to the variation of the amount of movement it causes in the body.
I = ΔQ
The amount of movement is a vector quantity that results from the multiplication of the mass of a body by its speed. Its direction and direction are the same as the velocity vector of the body.
Q = m-V
As the car goes to rest after the application of force, the amount of final movement of the car is equivalent to zero.
I = 0 - mV
F. Δt = - mV
F. 0,1 = - 1000. 20
F = - 20000/0,1
F = 200,000 N
F = 2,0. 10⁵ N
What is the relationship between amplitude and frequency of a wave?.
Answer:
The relationship between the wave's amplitude and frequency is such that it is inversely proportional to the frequency. The amplitude decreases as the frequency increases. The amplitude increases as the frequency decreases. The higher the energy of a wave, the higher the amplitude. The lower the energy, the lower the amplitude. Energy has no effect on wavelength, speed, or frequency, only the amplitude.
Explanation:
What body systems work together whenever you get a cut on your finger?
A. Reproductive and skeletal system
B. Circulatory system and immune system
C. Circulatory system and digestive system
D. Digestive system and nervous system
If two objects are the
different sizes and the
same temperature, which
object will have more
thermal energy?
Answer:
I would say the smaller object.
Explanation:
In any case, thermal energy can be spread throughout the object easier, and quicker, rather than the bigger object.
For example: You are boiling two pots of water, let's suppose Pot A has twice as much as Pot B:
|--------------------- | | |
| | |----------------------- |
|_____________| |______________|
Pot A Pot B
If you boil them at both the same time, temperature, and continue that for sometime, your results will be that Pot B will have risen in temperature alot faster than Pot A
The comparison:
Pot A and Pot B's Amount of water - Supposed to be the different size of the objects
Stove/Boiling: Would be if thermal heat were to enter the objects at the same temperatures.
why does heat flows from hot body to cold body?
Answer:
The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermal equilibrium, the atoms of higher kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.
Explanation:
Explanation:The atoms in the hot bodies have higher kinetic energy than those of the cold bodies. Thus to maintain thermaler kinetic energy tries to move and collide with the atoms of low kinetic energy. Thus heat transfers from a hot body to a cold body.
How many energy levels do elements in Period 6 have?
Answer:
food
Explanation:
Define heat capacity of a substance.
Write the S.I unit of heat capacity.
Define heat capacity of a substance:
The heat capacity of a substance can be defined as the amount of heat required to change its temperature by one degree.Write the S.I unit of heat capacity:
Joule per Kelvin[tex] \: \: \: [/tex]
Joule per Celsius[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
[tex] \: \: \: [/tex]
-,-
Flashcards should focus on a. Key points c. Both of these b. Bits of information d. None of these Please select the best answer from the choices provided A B C D.
Answer:
c
Explanation:
1. Charges acquired by rubbing is called_____
2.A ______ can save building from lightning stroke.
Answer:
static electricity and then lightning rod
1. friction
2. Lightning rod/conductor
Love, which can’t be observed or measured directly, is an example of a psychological construct.
Please select the best answer from the choices provided
T
F
Name the three types of musical instruments. How is sound produced in each type?
Answer:
keyboard , guitar and violin
An object of mass 4.0kg is situated at a point where there is gravitational field strength of 9.0N/kg. What is the weight of the object
Answer:
Explanation: mASS = 4 KG
G.F = 9 N/KG
SO
W = 9 X 4
W = 36 N
Rows on the periodic table are known as
Columns
O Families
O Rows
O Periods
Answer:
periods
Explanation:
The answer is periods i googled it
challenge
3. A car accelerates at a constant rate from 15 m's to 25 m/s while it
travels a distance of 125 m. How long does it take to achieve the final speed?
Answer:
6.25 second
Explanation:
we know that
s= (u+v)/2*T
125=20t
t=6.25 second
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What is the relationship of gas pressure to it temperature?
Explanation:
By Gay-Lussac's law
Pressure is directly proportional to its temperature at given volume.
When the temperature of a system goes up, the pressure also goes up, and vice versa.
Answer:
So, as pressure increases, temperature will increase as well or vice- versa
Explanation:
The Ideal Gas Equation is PV = nRT, where :-
P = Pressure
V = Volume
n = number of moles
R = Molar Gas Constant
T = Temperature
In this, P ∝ T
=> So, as pressure increases, temperature will increase as well or vice- versa
What is the gravitational potential energy of the tennis ball at position A?
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15 PLEASE HELP
Nora rides a bicycle for 5 min on a curvy road
at a constant speed of 10 m/s. Describe Nora's
ride in terms of position, velocity, and
acceleration. Compare the distance she rides
and her displacement.
Answer:
Ok, her position changed over time since the road is curved.
The velocity changed since the direction is changing
AccelerTion: theres a change in velocity since the direction changes
Direction: changed over time
Displacement : difference between 1st and final position
Explanation:
Displacement : difference between 1st and final position
What is Displacement?Displacement is defined as the change in position of an object. It is a vector quantity and has a direction and magnitude.
Ok, her position changed over time since the road is curved.
Accelertion: theres a change in velocity since the direction changes
Nora's ride in terms of position is 10*5*60 = 3000 meter is position
Displacement : difference between 1st and final position.
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A 5. 3 ft -ft-tall girl stands on level ground. The sun is 30 ∘ above the horizon. How long is her shadow?
The length of the girl's shadow is approximately 9.18 ft. The length of the shadow of a 5.3 ft-tall girl standing on level ground with the sun 30 degrees above the horizon, we can use the shadow length formula:
L = H / tan(a)
where L is the length of the shadow, H is the height of the object (in this case, the girl), and a is the angle to the source of light (in this case, the sun).
we can see that the formula for calculating the length of a shadow is given in. We can also see that the height of the girl is 5.3 ft and the angle to the source of light (the sun) is 30 degrees, as given in.
Plugging these values into the formula, we get:
L = 5.3 / tan(30)
L = 5.3 / 0.5774
L = 9.18 ft (rounded to two decimal places)
Therefore, the length of the girl's shadow is approximately 9.18 ft.
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could any of u help me with these question. Its 8th grade science i need help with it
A yacht sailing to the east at a constant velocity took 0.7hours to sail 70kilometers. What was the yacht's velocity?
Answer:
v = 100 [km/h]
Explanation:
To solve this problem we must identify that the movement is at constant speed, that is, there is no acceleration, therefore we must use the following expression for Speed, which relates is displacement with time.
v = d/t
where:
v = velocity [km/h]
d = displacement = 70 [km]
t = time = 0.7 [h]
v = 70/0.7 = 100 [km/h]
What is the strength of the electric field 0.020 m from a 12 µc charge? (use k=) 5.4 × 106 n/c 2.7 × 108 n/c 5.4 × 1012 n/c 2.7 × 1014 n/c
The strength of the electric field will be 2.7 x 108 N/C.
What is the strength of the electric field?The strength of the electric field is the ratio of electric force per unit charge. Its unit is NC⁻¹.
The given data in the problem is;
E is the strength of the electric field =?
d is the distance = 0.020 m
q is the charge= 12 µc =12 ×10⁻⁶C
The electric field strength is given by;
[tex]E = \frac{Kq}{d^2} \\\\E = \frac{9 \times 10^9\times 12 \times 10^{-6}}{(0.020)^2} \\\\E = 2.7 \times 10^8 N/C[/tex]
Hence the strength of the electric field will be 2.7 x 108 N/C.
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Answer B is right or 2.7 × 108 N/C
Explanation:
what has the ability do when a force is applied to an object over distance
Hello friend! Hope you find this response helpful! :)
If you apply a force over a given distance - you have done work. Work = Change in Energy. If an object's kinetic energy or gravitational potential energy changes, then work is done. The force can act in the same direction of motion. Or, the force can act against the motion.
What happens within the motor when an electric current flows through the loop of a wire
Answer: I think its B: The loop becomes electromagnetic, which causes the loop to flip and produce mechanical energy.
Explanation:
Which of the following surface offers minimum friction ?
Sand
Water
Ice
Grass
Answer:
it is Ice, of course
Explanation:
some text to answer