Answer:
27.39 m/s
Explanation:
From the question given above, the following data were obtained:
Deceleration (a) = –3 m/s²
Distance (s) = 125 m
Final velocity (v) = 0 m/s
Initial velocity (u) =?
The initial velocity (u) of the car can be obtained as follow:
v² = u² + 2as
0² = u² + (2 × –3 × 125)
0 = u² + (– 750)
0 = u² – 750
Collect like terms
0 + 750 = u²
750 = u²
Take the square root of both side
u = √750
u = 27.39 m/s
Thus, the initial velocity of the car was 27.39 m/s
The density of iron is 7.87 g/cm3. If an iron cannonball has a volume of 105 cm3
what is the mass of the ball?
the answer is 0.284 lb/in3
In a typical golf swing the club is in contact with the ball for about 0.0010 s. If the .045 kg ball experiences a force of 4000 N, what is the final velocity of the golf ball?
Answer:
v = 88.89 [m/s]
Explanation:
To solve this problem we must use the principle of conservation of momentum which tells us that the initial momentum of a body plus the momentum added to that body will be equal to the final momentum of the body.
We must make up the following equation:
[tex]F*t = m*v[/tex]
where:
F = force applied = 4000 [N]
t = time = 0.001 [s]
m = mass = 0.045 [kg]
v = velocity [m/s]
[tex]4000*0.001=0.045*v\\v=88.89[m/s][/tex]
There are two types of photons (particles of light) used in this simulation, Visible and Infrared. Select the visible photon first.
Explanation:
if this is wrong sorry but I think it is Infrared
answer:
earth’s surface absorbs the sunlight photons and reflects infrared photons
explanation:
this is edmentum's exact answer :)
As Earth revolves around the sun, what is this balance point that marks the actual center of revolution between two orbiting celestial bodies
Answer:
center of mass
Explanation:
newton's law of gravitation is measured from the center of the mass, not the surface. so you will measure the radius from the center of the sun to the center of the earth.
A body initially moving with a speed of 20m/s covers a distance of 150m after 5 sec .What is the acceleration of the body?
Answer:
a=4m/s2
Explanation:
Vi= 20m/s
S=150 m
t= 5 sec
a=?
using 2nd equation of motion;
S= Vit+0.5at^{2}
putting values
150= (20)(5)+0.5(a)([tex]5^{2}[/tex])
150-100= 12.5a
50/12.5 =a
4m/s2=a
How would you find the horizontal net force for the free body diagram below
Subtract Fn from Fa
Add Ff from Fa
Subtract Ff from Fa
Add Fa and Fg
Answer:
Add Ff from Fa
Explanation:
Fnet = sum of all force
horizontal net force = Ff + Fa
A circuit contains two 1.5 volt battery and a bulb with a resistance of 3 ohms. Calculate the current
Answer:
The current is 1 A
Explanation:
Current in a Series Connection
When two or more elements are connected in series, all of them have the same current, and the sum of their individual voltages is the total voltage applied to the circuit.
According to Ohm's law:
V=R.I
Where V is the voltage, R is the resistance and I is the current of a circuit.
We have a voltage of V=1.5 V + 1.5 V = 3 V and a resistance of R=3 ohms.
We can calculate the current by solving for I:
[tex]\displaystyle I=\frac{V}{R}=\frac{3}{3}=1\ A[/tex]
The current is 1 A
...
please halp
Please answer the following 3 questions with a 1 paragraph response:
Why is defense important in the game of basketball? What two ways can you play defense in basketball? What are the differences between the 2 different ways you can choose to play defense?
The two basic defenses in basketball are man-to-man, sometimes referred to as person-to-person in respect for the rise of women's basketball, and zone. Each basic defense has a number of variations.
if a 12 V battery is connected to a 6 Ohm resistor, what is the current through the resistor?
plz help it's due in 5 days ;w;
Answer:
From the ohms law, V=IR
Where V is Voltage
I is current
R is Resistance
:. I=V/R
I=12/6
I=2A
The current will be 2A
Explanation:the flow of charges per unit time is inversely proportional to the resistance, when resistance increase, the current flow decreases to appreciate the change.
In this graph, the slope of the curve is
increasing. Explain this in terms of velocity
and acceleration.
Answer:
The slope of an x vs. t graph represents instantaneous velocity. As we can see, the slope of this graph is not constant- it is changing. This means that the instantaneous velocity is also changing. Therefore, the object is accelerating.
Explanation:
Juan y Pedro transportan una caja que pesa 120,00 Lb sobre una tabla uniforme de 12 pies de largo y peso de 44,5 Lb. El peso de 120 Lb está a 4,9 pies de Pedro. ¿Cuál es el módulo de la fuerza en Lb que debe ejercer Pedro por el extremo derecho de la tabla horizontal para sostener este peso?
Answer:
F = 93.25 lb
Explanation:
To solve this problem let's use the rotational equilibrium condition
Σ τ = 0
let's fix a reference system located at the end of the table, the position of Juan and assume the counterclockwise turns as positive
F_jhon 0 - w l / 2 - W (l-4.9) + F l = 0
F = w l / 2 + W (l -4.9) / l
where w is the weight of the table and W the weight of the box
let's calculate
F = (44.5 12/2 + 120 (12- 4.9)) / 12
F = 93.25 lb
What can chemical formulas represent?
A.) mixtures
B.) elements
C.) compounds
D.) atoms
Answer:
A chemical formula identifies each constituent element by its chemical symbol and indicates the proportionate number of atoms of each element. In empirical formulae, these proportions begin with a key element and then assign numbers of atoms of the other elements in the compound, by ratios to the key element.
hope this helps you
Convert 9600 nm to pm:
Answer:
hsjdjdht
Explanation:
Characteristics we use to tell the difference between kinds of matter are called___ properties
Answer:
I believe it's called qualitative
Explanation:
A 2.25kg solid sphere has a rotational inertia about its center
• of gravity of 1.52kg.m2. What is the radius of the sphere?
Answer:
r = 1.3m
Explanation:
The moment of inertia of a solid sphere can be expressed using the formula;
I = ⅖ mr²
Where;
I = moment (kgm²)
m = mass of the sphere (kg)
r = rotational radius of the sphere (m)
Based on the provided information in this question, I = 1.52 kgm², m = 2.25 kg, r = ?
1.52 = ⅖ × 2.25 × r²
1.52 = 0.4 × 2.25 × r²
1.52 = 0.9 × r²
1.52 = 0.9r²
r² = 1.52/0.9
r² = 1.688
r² = 1.69
r = √1.69
r = 1.3m
9. A soft drink distibutor drove west 11 km from Minnehaha to Nut Plains. She then turned around and drove back east for 209 km to Dover
What distance did the soft drink dibutor travel
Distance
Answer:
220km
Explanation:
Given parameters:
Distance traveled from Minnehaha to Nut Plains = 11km
Distance traveled to Dover = 209km
Unknown:
The distance the soft drink distributor traveled = ?
Solution:
To solve this problem, we must understand that distance is the total length of path covered in a journey.
So;
Distance = 209km + 11km = 220km
The soft drink distributor covered 220km
A physical property is a characteristic of a substance is one that _____.
A.) can be observed by changing it into a different substance
B.) is seen after changing it into a different substance
C.) can be observed without changing it into a different substance
D.) does not involve freezing or boiling the substance
Which of the following is true for sound waves?
They require a medium
They are unrelated to vibrations.
They can travel in a vacuum
They cannot travel through liquids
None of the above
Explanation:
Answer
λ α
f
1
Wave velocity = Wavelength × Frequency
Thus, we can say that wavelength is inversely proportional to the frequency.
FALSE - Only electromagnetic waves can travel through a vacuum; mechanical waves such as sound waves require a particle-interaction to transport their energy. There are no particles in a vacuum.
Electrical energy is widely used among the various sources of energy...Justify
Answer:
Electricity is both a basic part of nature and one of the most widely used forms of energy. The electricity that we use is a secondary energy source because it is produced by converting primary sources of energy such as coal, natural gas, nuclear energy, solar energy, and wind energy, into electrical power.
20 points please helppp me I’m begging u this is due soon please come on ????? Anyone
Answer:
Gases are element .We can change the state of matter by the process of melting,evaporation,sublimation,freezing,condensation.
For maximum benefit, you should exercise 5-7 times a week for 60 minutes and your heart rate should be between _____________ of your max heart rate.
Answer:
60 to 80%
Explanation:
For maximum benefit, the heart rates during exercise regimes should be between 60 to 80% of an individual's maximum heart rate.
The maximum heart rate varies from individuals to individuals and largely depends on age. It is calculated by subtracting one's age from 220. For example, a person that is 40 years old would have a maximum heart rate of;
220 - 40 = 180 beats per minute.
Such a person's heart rates during exercises should be between 108 and 144 beats per minute for maximum benefits.
A man walks 2.6 miles east, then turns and walks 6.7 miles north. What is his resultant
vector from start to finish?
Answer:
Yes cause he walks 6.7 miles
The displacement vector of the man is equal to 17.41 miles in the Northeast direction.
What is displacement?The displacement of an object can be defined as the shortest distance between two points. The displacement can be described as a vector quantity because contains both direction and magnitude. The displacement can be positive (+ve), negative, or zero and can change with time.
The distance is the total path traveled and is a scalar quantity as it has only magnitude, and no direction. The distance is always positive (+ve), it can never be equal to zero.
Given, a man moves 2.6 miles along AB in the East and then 6.7 miles North along BC.
The displacement (AC) of the man can be calculated by using Pythagoras' theorem:
AC² = AB² + BC²
AC² = (2.6)² + (6.7)²
AC² = 6.76 +44.89
AC = 17.41 miles
Therefore, the displacement vector of the man is 17.41 miles.
Learn more about displacement, here:
brainly.com/question/3243551
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8.
What quantities are needed to describe the position of a water fountain relative to where you are standing?
Answer:
D. the distance and direction to the water fountain
Explanation:
To describe the position of a water fountain relative to where one is standing, the distance and direction to the water fountain must be known.
This quantity is known as the displacement.
Displacement is a vector quantity with both magnitude and direction. To specify the magnitude of a displacement, we use the length of path and in this case the height or sometimes the distance. The direction attribute distinguishes distance from displacement The perfect quantity to solve this problem is the displacement and it specifies the distance of the path and the direction traveled.whos the best character in assassination classroom
Answer:
Its a tie between Karma, Korosensei, and nagisa
Explanation:
Personally Karma
Help plz i’ll mark branliest
Answer:
please give me BRAINLIEST Answer
Explanation:
10.0 210.0 ms2
5.0 25.0 ms2
15.0 215.0 ms2
Which of the following actions will always decrease voltage?
A. Decreasing resistance and increasing current
B. Increasing resistance and decreasing current
C. Decreasing resistance and keeping current constant
D. Increasing resistance and keeping current constant
Answer:
D. Increasing resistance and keeping current from A P E X :))
Explanation:
The decreasing resistance and keeping current constant leads decreasing in voltage option (C) is correct.
What is voltage?Voltage is the force applied by the power source to charged electrons in a conducting loop, allowing them to perform tasks such as igniting light.
As we know according to the ohm's law:
V = IR
Where 'V' is the volatge,
'I' is the current.
'R' is the resistance.
If we assume 'I' is constant
Then V∝R
As the resistance increases the voltage increases and vice versa.
Thus, the decreasing resistance and keeping current constant leads decreasing in voltage option (C) is correct.
Learn more about the voltage here:
https://brainly.com/question/13521443
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How are electromagnetic waves different than all other waves?
Answer:
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate. This means that electromagnetic waves can travel not only through air and solid materials, but also through the vacuum of space. ... This proved that radio waves were a form of light
Answer:
They travel through space
Explanation:
2021 edge
If a runner exerts 350 J of work to make 125 W of power, then how long did it take the runner to do the work?
Explanation:
p=w/t
t=w/p
=350/125
t=2.8s
Which two types of potential energies would be types of mechanical energies? electrical and kinetic nuclear and chemical radiant and thermal elastic and gravitational
The two types of potential energies that would be types of mechanical energies are:
thermal elastic energy and gravitational energy.What is potential energy?The term potential energy is the energy possessed by a body by virtue of its position. It is different from kinetic energy which is due to the state of motion of a body.
The two types of potential energies that would be types of mechanical energies are;
thermal elastic and gravitational energy.Learn more about mechanical energy: https://brainly.com/question/1932868
Answer: D - elastic and gravitational
Explanation: Edge 2023
behavioral addaptions of a flamingp
Answer:Webbed feet support them on soft mud. Flamingos frequently stand on one leg. Being ableto curl the leg under the body, American flamingo keeps the foot warm andconserves body heat. Flamingo stand on one leg in both cool and warmenvironments.
Explanation: