Answer:
c
Explanation:
Answer:
C
Explanation:
got it right on edge
if a certain car, going with speed v1, rounds a level curve with a radius r1, it is just on the verge of skidding. if its speed is now doubled, the radius of the tightest curve on the same road that it can round without skidding is:
Answer:
The correct answer is 4R1
Explanation:
According to the given scenario ,the radius of the tightest curve on the same road without skidding is as follows:
As we know that
Centeripetal Acceleration is
= v^2 ÷ r
In the case when velocity becomes 2 times so the r would be 4 times
So, the radius of the tightest curve on the same road without skidding is 4R1
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In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as a skateboarder rides a halfpipe or a pendulum moves, why did the bar for the total energy remain constant?Question 1 options:
A. Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved
B. Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model
C. all answers given are correct
D. This is because no energy is being created or destroyed in this system
Answer:
Answer:B
Explanation:
Because it all stayed consistant
Suppose you are told that acceleratioon A with of particle moving with uniform sleep v in a circle of radius R is proportional to same power of r(r) and same power of V. Determine the radius of A in and write the Simple form of equation for the acceleratioon
The equation for centripetal acceleration is:
[tex]A = \frac{V^{2} }{R}[/tex]
Centripetal acceleration is the rate at which a body moves through a circle. Due to the fact that velocity is a vector quantity (i.e., it has both a magnitude, the speed, and a direction), when a body travels in a circle, its direction is continually changing, which causes a change in velocity, which results in an acceleration.
The equation for centripetal acceleration is:
[tex]A = \frac{V^{2} }{R}[/tex]
therefore, the centripetal acceleration, denoted by the symbol A, has a magnitude equal to the square of the body's velocity along the curve divided by the radius of the circle, denoted by the symbol r. Units for centripetal acceleration are metres per second squared.
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Convert 90 mph into meter seconds and feer seconds 1 mile equals 1600 m 1 m equals 3.3 feet one hour equals 3600 seconds
The speed of 90 mph converted into meter per seconds and feet per seconds is 40 m/s and 132 ft/s respectively.
Hw can the speed of 90 mph be converted into meter per seconds and feet per seconds?The speed of an object or body is the distance covered per unit time.
Speed = distance/timeThe given speed is in miles per hour.
To convert miles per hour to meter per second, the following steps are followed;
1 mile = 1600 m
90 miles = 90 * 1600 = 144000 m
1 hour = 3600 s
90 mph in m/s = 144000/3600
90 mph in m/s = 40 m/s
To convert meter per second to feet per second, the following steps are followed;
1 m = 3.3 ft
144000 m = 3.3 * 144000 = 475200 ft
1 hour = 3600 s
90 mph in ft/s = 475200/3600
90 mph in ft/s = 132 ft/s
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What is the volume of a rock with a density of 45 g/mL and a mass of 855 g?
The volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.
The volume of the rock can be calculated as
[tex]density = \frac{mass}{volume}[/tex]
Density is the measurement of how tightly a material is packed
together.
by using the above formula of density we can find volume as
[tex]volume = \frac{mass}{density }[/tex]
v = m/ρ
where v = volume
m = mass
ρ = density
density of a rock = 45 g/mL
mass of rock = 855g.
The volume of the rock can be calculated as follows:
Volume = 855g /45g/mL
Volume = 19mL
Therefore, the volume of a rock with a density of 45 g/mL and a mass of 855g is 19mL.
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How much work is done on a 3.0 kg book that is pushed across the top of a table to the other side until it stops? Its initial speed is 1.4 m's.
Answer:
Work down = 2.94 N
Explanation:
Given:
Mass of book m = 3 kg
Initial speed v = 1.4 m/s
Find:
Work down w
Computation:
Work down = Kinetic energy
SO,
Work down = 1/2(m)(v)²
Work down = 1/2(3)(1.4)²
Work down = 2.94 N
Four forces act upon a particle in the following manner: 50 N at 20° above the positive -
axis, 80 N at 40° to the left of the positive y-axis, 120 N at 35 below the negative
and 40 N at 25° to the right of the negative y-axis. Determine the magnitude and direction
of the resultant force.
axis
The magnitude of the resultant force is 89.88 N and the direction of the resultant force is 17.22°
We know that,
Vector of a force F = ( F cos θ, F sin θ )
Magnitude of a force F = √ ( x² + y² )
Angle of a force, θ = [tex]tan^{-1}[/tex] ( y / x )
Given that,
[tex]F_{1}[/tex] = 50 N, θ[tex]_{1}[/tex] = 20°
[tex]F_{2}[/tex] = 80 N, θ[tex]_{2}[/tex] = 130°
[tex]F_{3}[/tex] = 120 N, θ[tex]_{3}[/tex] = 215°
[tex]F_{4}[/tex] = 40 N, θ[tex]_{4}[/tex] = 295°
Vector of Resultant force, [tex]F_{R}[/tex] = ( [tex]F_{1}[/tex] cos θ[tex]_{1}[/tex], [tex]F_{1}[/tex] sin θ[tex]_{1}[/tex] ) + ( [tex]F_{2}[/tex] cos θ[tex]_{2}[/tex], [tex]F_{2}[/tex] sin θ[tex]_{2}[/tex] ) + ( [tex]F_{3}[/tex] cos θ[tex]_{3}[/tex], [tex]F_{3}[/tex] sin θ[tex]_{3}[/tex] ) + ( [tex]F_{4}[/tex] cos θ[tex]_{4}[/tex], [tex]F_{4}[/tex] sin θ[tex]_{4}[/tex] )
[tex]F_{R}[/tex] = ( 50 cos 20°, 50 sin 20° ) + ( 80 cos 130°, 80 sin 130° ) + ( 120 cos 215°, 120 sin 215° ) + ( 40 cos 295°, 40 sin 295° )
[tex]F_{R}[/tex] = ( - 85.83, - 26.69 )
Magnitude of Resultant force, [tex]F_{R}[/tex] = √ ( - 85.83 )² + ( - 26.69 )²
[tex]F_{R}[/tex] = √ 7366.79 + 712.36 = √ 8079.15
[tex]F_{R}[/tex] = 89.88 N
θ = [tex]tan^{-1}[/tex] ( - 26.69 / - 85.83 ) = [tex]tan^{-1}[/tex] ( 0.31 )
θ = 17.22°
Therefore,
Magnitude of the resultant force = 89.88 N Direction of the resultant force = 17.22°To know more about resultant forces
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1. The distance between New York City and Dallas is about 1500 miles. Assume you drive to New York City at an average velocity of 80 miles per hour - how many hours will it take to reach New York City?
Answer: 22 hours 15 minutes
Explanation: The calculated flying distance from New York City to Dallas is equal to 1371 miles which is equal to 2206 km. If you want to go by car, the driving distance between New York City and Dallas is 2492.32 km. If you ride your car with an average speed of 112 kilometers/hour (70 miles/h), travel time will be 22 hours 15 minutes.
Energy Transformation
A car with a mass of 2000 kg is traveling down the highway at a constant 20 m/s. How much kinetic energy does it have?
100 J
50 J
400.000 J
40.000 J
Answer:
K =400000 J
Explanation:
Kinetic Energy
Is the energy an object has due to its state of motion. It's proportional to the square of the speed.
The equation for the kinetic energy is:
[tex]\displaystyle K=\frac{1}{2}mv^2[/tex]
Where:
m = mass of the object
v = speed at which the object moves
The kinetic energy is expressed in Joules (J)
The car has a mass of m=2000 Kg and travels at v=20 m/s. Calculating the kinetic energy:
[tex]\displaystyle K=\frac{1}{2}2000*20^2[/tex]
Calculating:
K =400000 J
A series circuit has a 12-volt power source and two resistors of 1 ohm and 2 ohms respectively. How many amps will flow when
the circuit is closed?
Answer:
ayoooooooo
Explanation:
A 5.0-m-diameter merry-go-round is turning with a 3.7 s period. Part A What is the speed of a child on the rim
Answer:
Speed of a child on the rim is 4.25 m/s.
Explanation:
Given;
diameter of the merry-go-round, d = 5.0 m
period of the motion, t = 3.7 s
one complete rotation of the merry-go-round = πd
one complete rotation of the merry-go-round = π(5) = 15.71 m
Speed is given as distance / time
speed of a child on the rim = 15.71 / 3.7
speed of a child on the rim = 4.25 m/s
Therefore, speed of a child on the rim is 4.25 m/s.
in both a dry cell and a wet cell battery, what causes the production of an electrical current.
a. chemical reaction

b.a step down substation transformer
c. magnets
d. generators at a power plant
Answer:
a. chemical reaction
Explanation:
In both a dry and wet cell battery, electric currents are produced through chemical reactions.
Both cells are together called electrochemical cells.
In these cells, chemical reactions produce an electric current. They are devices that converts chemical energy into electrical energyThe reactions here are spontaneous redox reactions. This causes the current to flow on their own in the circuit.What is the frequency of a pendulum that is moving at 30
m/s with a wavelength of 0.32 m?
Answer:
85.7Hz
Explanation:
v=f*λ
f = frequency
λ = wavelength
The frequency of the pendulum which is moving with a velocity of 30 m/s with a wavelength of 0.32 m is 93.75 Hz.
What is Frequency?The term frequency refers to the number of waves which are passing a fixed point in the unit time. Frequency also describes the number of cycles or the vibrations which are undergone during one unit of time through an object or a body in periodic motion. The SI unit of frequency is Hertz (Hz).
Wavelength = Velocity/ Frequency
Frequency = Velocity/ Wavelength
Frequency = 30/ 0.32
Frequency = 93.75 Hz
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A monatomic ideal gas with volume 0.230 L is rapidly compressed, so the process can be considered adiabatic. If the gas is initially at 1.01 105 Pa and 3.00 102 K and the final temperature is 489 K, find the work done by the gas on the environment, Wenv.
Answer:
The value is [tex]W = - 17.53 \ J[/tex]
Explanation:
From the question we are told that
The volume is [tex]V = 0.230 \ L = 0.230 *10^{-3} \ m^{-3}[/tex]
The initial pressure is [tex]P_1 = 1.01105 \ Pa[/tex]
The initial temperature is [tex]T_1 = 3.00*10^2 \ K[/tex]
The final temperature is [tex]T_2 = 489 \ K[/tex]
Generally for an adiabatic process the workdone is mathematically represented as
[tex]W = - \Delta U[/tex]
Here [tex]\Delta U[/tex] is the internal energy of the system which is mathematically represented as
[tex]\Delta U = \frac{3}{2} * nR \Delta T[/tex]
So
[tex]W = - \frac{3}{2} * nR \Delta T[/tex]
Generally from ideal gas equation we have that
[tex]n = \frac{P_1V }{ RT_1 }[/tex]
Here R is the gas constant with value [tex]R = 8.314 J/mol\cdot K[/tex]
So
[tex]n = \frac{1.01 *0^{5} * 0.230 *10^{-3}}{ 8.314 * 3.0*10^2 }[/tex]
=> [tex]n = 0.009313 \ mol[/tex]
So
[tex]W = - \frac{3}{2} * 0.009313 * 8.314 * (451 - 3.00*10^2)[/tex]
=> [tex]W = - 17.53 \ J[/tex]
A delusion is best characterized as
Answer:
This is the most common form of delusional disorder. In this form, the affected person fears they are being stalked, spied upon, obstructed, poisoned, conspired against or harassed by other individuals or an organization.
Explanation:
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pick me as the brainliest
Show that the force of gravity is 3.5 * 1022 N between Earth and the Sun
(Sun’s mass = 2.0 x 1030 kg; average Earth–Sun distance = 1.5 x 1011 m).
The force of gravity between the sun and the earth is determined as 3.54 x 10²² N.
What is force of gravity?This is the force of gravity is the force exerted between two objects in the universe.
According to Newton's law of universal gravitation, two bodies in space pull on each other with a force proportional to the product of their masses and the inversely proportional to the square of the distance between them.
F = Gm1m2/r²
where;
m1 is mass of the sunm2 is mass of the earthr is the distance between the two bodiesF = (6.67 x 10⁻¹¹ x 2 x 10³⁰ x 5.97 x 10²⁴) / (1.5 x 10¹¹)²
F = 3.54 x 10²² N
Thus, the force of gravity between the sun and the earth is determined as 3.54 x 10²² N.
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What causes the magnetic field around the wire?
Magnetic field
O A. An electric current
O B. An electric field
PREVIOUS
An electric current causes the magnetic field around the wire. The correct answer is A.
The magnetic field around a wire is caused by the flow of electric current through the wire. When an electric current passes through a wire, it generates a magnetic field that forms circular lines of magnetic flux around the wire. This phenomenon is described by Ampere's law, which states that a magnetic field is produced by an electric current and its strength is directly proportional to the magnitude of the current.
The relationship between the electric current and the magnetic field can be understood using the right-hand rule. If you wrap your right hand around the wire with your thumb pointing in the direction of the current, the curled fingers indicate the direction of the magnetic field lines.
Therefore, an electric field is generated by an electric charge, not by an electric current. While an electric field can exist around a wire if there is a potential difference (voltage) applied across it, it is the flow of electric current that primarily generates the magnetic field.
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You are testing a water heater design. One criterion is that the water heater heat water to a temperature of 180 °F. During testing, you find that the water in the water heater reaches a temperature of 200 °F. What would you do next?
Answer:
Explanation:
If the required max temperature needs to be 180 °F but the water temperature is hitting 200 °F then it is surpassing the desired temp and therefore failing to complete its purpose. Therefore, the next step would be to adjust the design and add a thermometer sensor to stop the water heater once the water temperature reaches the desired 180 °F. This would make the water heater serve its purpose as intended.
A bicyclist was moving at a rate of 3 m/s, and then sped up to 4 m/s. If the cyclist has a mass of 100 kg, how much work was needed to increase his velocity? (Hint: Use the work-kinetic energy theorem.) O A. 1250 J B. 450 J O c. 350 j D. 800 J
Answer:
i got b but urs is a little different tell me if right
Explanation:
i go 100 on my test
A student adds two vectors of magnitudes 48 m and 22 m. What are the maximum and minimum possible values for the resultant of these two vectors.
Answer:
Maximum=70 m
Minimum=26 m
Explanation:
Vector Addition
Since vectors have magnitude and direction, adding them takes into consideration not only the magnitudes but also their respective directions. Two vectors can be totally collaborative, i.e., point to the same direction, or be totally opposite. In the first case, the magnitude of the sum is at maximum. Otherwise, it's at a minimum.
Thus, the maximum magnitude of the sum is 48+22 = 70 m and the minimum magnitude of the sum is 48-22= 26 m
What is the final velocity of an object that starts from rest and accelerates uniformly at 4
m/s2 over a distance of 8 m?
Answer:
8m/s
Explanation:
Given parameters:
Initial velocity = 0m/s
Acceleration = 4m/s²
Distance = 8m
Unknown:
Final velocity = ?
Solution:
To solve this problem, we use the right motion equation and find the unknown.
The right motion equation to solve this problem is given as :
v² = u² + 2aS
v is the final velocity
u is the initial velocity
a is the unknown acceleration
S is the distance
Now insert the parameters and solve;
v² = 0² + 2 (4) (8)
v² = 64
v = 8m/s
Why does a stop sign appear red?
Answer:
because it’s suppose to be red like a stop light.
Explanation:
So it tells you to stop
Forces that cancel each other are called_ forces \
Answer:
balanced forces
As the temperature of a blackbody increases, what happens to the peak wavelength of the light it radiates
Answer:
The peak wavelength of the light it irradiates decreases
Explanation:
As the temperature of a blackbody increase, the peak wavelength of the light it radiates decreases, this follows Wien's Law.
A blackbody is an ideal substance that emits all frequencies of light and also has the ability to absorb them as well.
Wiens displacement law, explains that the position of the peak wavelength of the thermal radiation emitted by bodies can change with temperature, and as the temperature increases beyond a certain point, the wavelength begins to reduce. This often changes the colour of the light emitted from heated objects.
Answer:
The peak wavelength increases.
Explanation:
I just took the test this is correct.
Girl runs 40m due south in 40 seconds,he then return to North,20m in 10 seconds,, calculate
1. average speed
2.average velocity
3.change in velocity
4.acceleration
Help me please
For a velocity versus time graph how do you know what the velocity is at a certain
time? How do you know the acceleration at a certain time? How do you know the
Displacement at a certain time?
Answer:
For a velocity versus time graph how do you know what the velocity is at a certain time?
Ans: By drawing a line parallel to the y axis (Velocity axis) and perpendicular to the co-ordinate of the Time on the x axis (Time Axis). The point on the slope of the graph where this line intersects, will be the desired velocity at the certain time.
_____________________________________________________
How do you know the acceleration at a certain time?
[tex]Ans: We\ know\ that\ acceleration = \frac{Final\ velocity-Initial\ Velocity}{Time\ taken}[/tex]
Hence,
By dividing the difference of the Final and Initial Velocity by the Time Taken, we could find the acceleration.
_________________________________________________________
How do you know the Displacement at a certain time?
Ans: As Displacement equals to the area enclosed by the slope of the Velocity-Time Graph, By finding the area under the slope till the perpendicular at the desired time, we find the Displacement.
_________________________________________________________
Starting at rest, A car accelerated to 20m/s in 4s. How far did the car travel as it sped up. Assume constant acceleration?
Answer:
40 m
Explanation:
displacement = 1/2 a t^2
= 1/2 ( 20/4) (4^2)
40 m
Arvin, the ant, is on a picnic table. He travels 30 cm eastward, then 25 cm northward, and finally 15 cm westward. What is total distance traveled by Arvin?
Answer:
The total distance traveled by Arvin is 70 cm.
Explanation:
Distance and Displacement
A moving object constantly travels for some distance at defined periods of time. The total distance moved is the sum of each individual distance the object traveled. It can be written as:
dtotal=d1+d2+d3+...+dn
This sum is obtained independently of the direction the object moves.
The displacement only takes into consideration the initial and final points of the path defined by the object while it's moving. The displacement, unlike distance, is a vectorial magnitude and can be even zero if the object starts and ends the movement at the same point.
Arvin, the ant, moves 30 cm eastward, then 25 cm northward, and finally 15 cm westward. The total distance traveled is 30 cm+25 cm + 15 cm = 70 cm.
The total distance traveled by Arvin is 70 cm.
A cup of water plugged by a brown cork is insulated by a second styrofoam cup. A black rod and a thermometer are inserted through the cork into the water. The thermometer is A, the water is B, the outer cup is C. This part insulates the reaction chamber from the transfer of heat to or from the surrounding environment. This part contains a known amount of water, which is placed there before the experiment starts. This part is where the metal is placed at the beginning of the experiment. This part is used for measuring the initial and final temperatures of the water.
The part that insulates the reaction chamber from the transfer of heat to or from the surrounding environment is (C).
How to illustrate the information?It should be noted that the cup of water plugged by a brown cork is insulated by a second styrofoam cup.
In this case, the black rod and a thermometer are inserted through the cork into the water.
This part that contains a known amount of water, which is placed there before the experiment starts is (B).
This part is where the metal is placed at the beginning of the experiment is (B).
This part that is used for measuring the initial and final temperatures of the water is (A).
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Answer:
Explanation:
C
B
B
A
Edge 2022
A car with an initial speed of 6.50 m/s accelerates at a uniform rate of 0.920 m/s2 for
3.60 s. Find the final velocity.
Answer:
v = 9.812 m/s
Explanation:
Given that,
The initia speed of a car, u = 6.5 m/s
Acceleration of the car, a = 0.92 m/s²
Time, t = 3.6 s
We need to find the final velocity of the car. Let the final velocity be v. Using equation of motion to find it as follows :
v = u +at
Putting all the values,
v = 6.5+(0.92)(3.6)
v = 9.812 m/s
So, the final velocity of the car is 9.812 m/s.