Answer:
v_avg = 4 m/s
Explanation:
The average velocity of the car is given by the distance traveled by the car, in a specific time.
The total distance is 20m, because the car moved to the reference point (10m), and then moves to 10m to the south. THe total distance is 20m.
Then, you use the following formula:
[tex]v_{avg}=\frac{x_t}{t}[/tex]
x_t: total distance traveled by the car = 20m
t: time in which the car made the trajectory = 5s
You replace the values of x_t and t:
[tex]v_{avg}=\frac{20m}{5s}=4\frac{m}{s}[/tex]
hence, the average velocity is 4m/s
The pressure of a gas is affected by what two things?
a. Quantity and Temperature
b. Pressure and Temperature
c. Quantity and Pressure.
d. Pressure and Height
Answer:
the correct answer is,
a. Quantity and Temperature
Answer:
B
Explanation:
pressure because, if the volume increases the pressure decreases.
Temperature because, if its hot molecules will be farther apart and if its cold molecules wil be tightly together
pls mark me brainliest
two current carrying wires are placed next to each other. Their currents are moving in the same direction. Suggest why each wire experiences a force
When there are two currents flowing in opposite direction the magnetic field are moving in the same directions. When the currents flow in the same direction the magnetic field will be opposite, causing the wires to attract.
The gravitational field strength on Mars is 3.7 N/kg. Kai has a mass of 55 kg. What would Kai weigh on Mars? Give your answer to 1 decimal place.
Kai weight on mars will be 203.5 N.
What is weight?It is the force of gravity on the object.The unit of weight is newton (N).Weight can be find out by multiplying the mass with gravitational field strength.How to solve this question?
Gravitational field strength on Mars = 3.7 N/kg. (Given)
Mass = 55 kg. (Given)
Weight = Mass × Gravitational field strength
Weight = 55 kg × 3.7 N/kg
Weight = 203.5 N
Thus, we can conclude that Weight is the Gravitational force between the object and the planet.
Learn more about Weight here:
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An object has a kinetic energy of 35j and a mass of 24j kg,how fast is the object moving?
Answer:
v = 1.7 m/s
Explanation:
We have,
The kinetic energy of the object is 35 J
Mass of the object is 24 kg
It is required to find the speed of the object. If v is the velocity, then kinetic energy is given by :
[tex]E=\dfrac{1}{2}mv^2[/tex]
or
[tex]v=\sqrt{\dfrac{2E}{m}} \\\\v=\sqrt{\dfrac{2\times 35}{24}} \\\\v=1.7\ m/s[/tex]
So, the speed of the object is 1.7 m/s.
a bike travels 4 miles in half an hour, what is its speed?
Answer:
8 mph
Explanation:
4 miles in half hour so you add 4 more for the second half
An 80 kg skateboarder moving at 3 m/s pushes off with her back foot to move faster. If her velocity increases to 5 m/s, what is her change in kinetic energy as a result? J How much work did she perform? J
Answer:
640 J
Explanation:
ΔKE = KE − KE₀
ΔKE = ½ mv² − ½ mv₀²
ΔKE = ½ m (v² − v₀²)
ΔKE = ½ (80 kg) ((5 m/s)² − (3 m/s)²)
ΔKE = 640 J
Her kinetic energy increases by 640 J, so she does 640 J of work.
It's 640 for both answers. :)
Find the prime factorization of 168.
Answer:
2 x 2 x 2 x 3 x 7 = 168
Explanation:
Prime factors of 168: 2, 3 and 7
These are the factors of 168: 1,2,3,4,6,7,8,12,14,21,24,28,42,56,84,168. Only 2, 3 and 7 are prime numbers meaning that they are only divisible by themselves and 1. Therefore they are the prime factors.
Answer:
Prime factors of 168: 2, 3 and 7
what is frictional force?
Answer:
Frictional force refers to the force generated by two surfaces that contacts and slide against each other.
~Hope this helps~ T^T
A periodic transverse wave that has a frequency of 10 Hz travels along a string. The distance between a crest and either adjacent trough is 2.5 m. What is the wavelength?
Answer:
5m
Explanation:
The wavelength of a wave is the distance between successive trough or crest ;
Meaning that distance between successive trough is distance between trough and crest plus distance between crest and trough
Which is 2 times distance between trough and crest;
2×2.5= 5m
Jalen combines two substances in science class. Once combined, only one of the two substances
is visible. When he placed this combination into a filter, substance 1 stayed in the filter while
substance 2 went through it. Which of the following claims regarding Jalen's combination is the
most accurate?
a. This combination is not a mixture because he cannot see one of the substances.
b. The combination is a mixture because the substances can be separated.
c. The combination is not a mixture because the substances can be separated.
d. The combination is a mixture only because he cannot see one of the substances,
Answer: b. The combination is a mixture because the substances can be separated
Explanation: Based on the facts presented above, the combination of both both substances can be referred to as a mixture due to the following:
A mixture is obtained when two or more substances or materials are combined without a chemical reaction. This is observed when Jalen combined substance 1 and 2 with only one of the substances becoming visible after the combination.
The other reason is that, a mixture can be separated back into its original constituent, this is evident when the combination was filtered with only substance 2 going through the filter and substance 1 remaining in the filter
ANSWER ASAP!!!If a wave machine produces 10 waves in 2 seconds, what is the frequency of the machine in Hertz?
Answer:
5Hz
Explanation:
Frequency = No. of waves per second
10 waves are produced in 2 seconds
in one second 10/2 waves are produced
(ie) 5 waves are produced in 1 second
Therefore the frequency of wave is 5 Hz
what is meant by tyndall effect? in point wise with example.
Answer:
scattering of light
Explanation:
is the scattering of light as a light beam passes through a colloid. The individual suspension particles scatter and reflect light, making the beam visible. ...
A 20 cm
B 15 cm
C 10 cm
D 5 cm
E 0 cm
If potential energy at point A is 12 joules, what is the potential energy at C?
Answer:
4.8.
Explanation
Covalent bonds are formed between .....
non-metal and non-metal
two or more nonmetals
metals and metals
Answer:
Non metal and nonmetal
Explanation:
Covalent bonds are formed between non-metal and non-metal
Hope this helps...
Please help do not guess
50 points
What is the range of time of the Devonian time period?
What is the name of the EON we are in now?
During what period saw the earliest amphibians?
From what time period is the cooksonia fossil from?
How many million years ago saw the extinction of dinosaurs?
What range of time did trilobites exist on earth?
During what time period saw the last advance and retreat of continental ice sheets?
Looking at the inferred position of the continents, what direction did North America move in the last 232 million years>
Judging by your answer to question 9, what has happened to the climate of North America during the last 232 million years? Explain your answer.
Answer:
358.9 (+/- 0.4) million years ago
Holocene Epoch, of the Quaternary Period
Devonian period
66 million years ago (prox)
521 million years ago
110,000 years ago
NW
North america became more cold when it moved NW
Explanation:
I really need help so heres the question: "A 100 watt lightbulb is on for 2 hours a day" What is the energy in watt-hour (Wh) it consumes per day?
Answer:
Explanation:
You have to assume the lightbulb consumes 100 watts of power. If it gives off 100 watts equivalent of light, you cannot solve the problem.
W = 100 watts
T = 2 hours
Energy = W * h
Energy = 100 * 2
Energy = 200 watt*hours
Sa se calculeze caldura degajata de un fier de calcat dace este alimentat la 220v si este parcurs de un curent electric de 100 a. Se stie ca acesta functioneaza 25 de min
Answer
33,000,000 joules or 33MJ
Explanation:
The formula for calculating the heat released by a substance is expressed as shown below;
where;
Q is the amount of heat released
p is the power expended
t is the time it takes
[tex]Since P = current * voltage\\P = IV[/tex]
Then;
[tex]Q = IVt[/tex]
Given the current I = 100A, supply voltage V = 220V and required time t = 25mins
t = 25 * 60 = 1500 seconds
Substituting these values in the formula that we have;
[tex]Q = 100 * 220 * 1500\\Q = 22000*1500\\Q = 33,000,000Joules\ or\ 33MJ[/tex]
an object is moving in a straight line with constant acceleration a)its acceleration start increasing at some rate than b)
velocity will start decreasing c) its velocity will keep on increasing d)its velocity will remain constant or objective is suddenly come to a stop
Answer:
C
Explanation:
Velocity = velocity (initial) + acceleration*time.
More time - higher velocity.
help......,.........................
Answer:
Explanation:
R1= (1/6 + 1/6)rised to -1 = 3 ohm
R total = R1 + 6 = 3+ 6 = 9 ohm
The law of conservation of energy states
A large container of water is sitting on a balance. The weight of the container plus the water is 10 newtons. An object the weight of 7 newtons hanging from a forcemeter is lowered towards the surface of the water . what reading on the force meter would you expect?
Answer:
3N
Explanation:
Note that when an object is immersed in water it weighs less.
This means the weight seen is the apparent weight.
Now in water there is upthrust and is a counter force acting on the object and this force is opposite to the weight of the fluid alongside the container 10N
The apparent weight is the real weight - the upthrust
7N-10 = -3N
The essence of the negative sign is to show that this force is acting in opposite direction to the weight.
Note: the upthrust is 10N and it's opposite to the weight of the fluid and the tube on which the object on the force meter is subjected to.
Carlotta makes a graphic organizer about the steps of the Sun’s hydrogen fusion process. A venn diagram of 3 intersecting circles with one circle labeled step 1, a second circle labeled step 2 and the third labeled step 3. There is a V in the step 1 circle. There is a Z in the step 3 circle. There is a W in the intersecting circle between step 1 and step 2. There is a Y in the intersecting section between step 2 and step 3. There is an X in the intersecting area of all 3 circles. She wants to add three labels. Label 1: is a reactant. Label 2: Energy is released. Label 3: Helium is produced. What is the best placement of the labels? Label 1 in region V. Label 2 in region X. Label 3 in region Z. Label 1 in region W. Label 2 in region Y. Label 3 in region Z. Label 1 in region W. Label 2 in region X. Label 3 in region Y. Label 1 in region V. Label 2 in region Z. Label 3 in region Y.
Answer:
label 1:w
label 2: x
label 3:y
Explanation:
you should add me on sp annabell_aaaa
Answer:
w,x,y
Explanation:
i did it on edg
You are sitting on a merry-go-round at a distance of 2m from its center. It spins 15 times in 3 min. What distance do you move as you make one revolution? What is your angular speed in RPM? What is your linear speed in meters per SECOND?
Answer:
A) 12.57 m
B) 5 RPM
C) 3.142 m/s
Explanation:
A) Distance covered in 1 Revolution:
The formula that gives the relationship between the arc length or distance covered during circular motion to the angle subtended or the revolutions, is given as follows:
s = rθ
where,
s = distance covered = ?
r = radius of circle = 2 m
θ = Angle = 2π radians (For 1 complete Revolution)
Therefore,
s = (2 m)(2π radians)
s = 12.57 m
B) Angular Speed:
The formula for angular speed is given as:
ω = θ/t
where,
ω = angular speed = ?
θ = angular distance covered = 15 revolutions
t = time taken = 3 min
Therefore,
ω = 15 rev/3 min
ω = 5 RPM
C) Linear Speed:
The formula that gives the the linear speed of an object moving in a circular path is given as:
v = rω
where,
v = linear speed = ?
r = radius = 2 m
ω = Angular Speed in rad/s = (15 rev/min)(2π rad/1 rev)(1 min/60 s) = 1.571 rad/s
Therefore,
v = (2 m)(1.571 rad/s)
v = 3.142 m/s
If a sound travels 343m/s through air and has a frequency of 800Hz, what would the wavelength be of the same sound traveling through water 500m/s with the same frequency?
Answer:
0.625m
Explanation:
Now Velocity of a wave ,V = frequency × wavelength
Wavelength =velocity /frequency
=500/800 =0.625m
um.. i need help ⚆ _ ⚆
What information can you infer from the Lewis structure diagram shown below?
A. Boron has six valence electrons.
B. Oxygen has six valence electrons.
C. Boron has five valence electrons.
D. Oxygen has five valence electrons.
Answer:
D.Oxygen has five valence electrons
A solenoid is 2.50 cm in diameter and 30.0 cm long. It has 300 turns and carries 12 A. (a) Calculate the magnetic field inside the solenoid. (b) Calculate the magnetic flux through the surface of a circle of radius 1.00 cm, which is positioned perpendicular to and centered on the axis of the solenoid. (c) The perimeter of this circle is made of conducting material. The current in the solenoid uniformly goes from 12 A to 10 A in 0.001 seconds. What e.M.F. Is generated in the conducting material? (d) Now, inside the solenoid we put a bar of steel, a ferromagnetic material. Steel has got a magnetic permeability μm = 4000μ0 . If the current in the solenoid is 12 A, what's the total magnetic field in the steel bar?
Answer:
a) B = 0.0151 T
b) [tex] \theta = 4.737 * 10^-^6 Tm^2 [/tex]
c) [tex] E = 7.896*10^-^4 [/tex]
d) [tex] = 60.4 T [/tex]
Explanation:
Given:
Diameter, d = 2.5 cm convert to meters = 0.025 m
Length, L = 30.0 cm convert to meters = 0.3 m
Number of turns, N = 300
Current, I = 12 A
a) Let's use the formula below to find the magnetic field.
[tex] B = \frac{u_0 N I}{L} [/tex]
[tex] B = \frac{4\pi * 10^-^7 * 300 * 12}{0.3} [/tex]
[tex] B = \frac{0.004524}{0.3} [/tex]
B = 0.0151 T
b) Given a radius, r = 1.00 cm, let's convert it to meters = 0.01 m
Let's use the formula below to find magnetic flux.
[tex] \theta = BA [/tex]
where [tex] A = \pi r^2 [/tex]
Therefore,
[tex] \theta = B \pi r^2 [/tex]
[tex] = 0.0151 \pi * (0.01)^2 [/tex]
[tex] \theta = 4.737 * 10^-^6 Tm^2 [/tex]
c) Given that the current in the solenoid uniformly goes from 12 A to 10 A in 0.001 seconds, the EMF generated will be:
[tex]E = \frac{- change in \theta}{change in t} = \frac{-u_0 N}{L} * \pi r^2 * \frac{change in I}{change in t}[/tex]
[tex] E = \frac{-4\pi * 10^-^7 * 300}{0.3} * \pi *(0.01)^2 * \frac{10 - 12}{0.001} [/tex]
[tex] -0.00125663 * \pi *(0.01)^2 * -2000[/tex]
[tex] E = 7.896*10^-^4 [/tex]
d) Let's use the formula:
[tex] \frac{u_m N I}{L} = 4000 \frac{u_0 NI}{L} [/tex]
[tex] 4000 * 0.0151 [/tex]
[tex] = 60.4 T [/tex]
The differences between microwaves and infrared radiation are due to differences in their _____.
A 25 V battery is connected into a circuit with two resistors in series. One resistor has resistance 5.0 Ω and the other has resistance 7.5 Ω. What is the voltage drop across the 7.5 Ω resistor?
Answer:
15 V
Explanation:
From the question,
For series connection: (i) Both resistor have a common current flowing through the (ii) The combined resistance = R1+R2
Rt = R1+R2.................. Equation 1
Given: R1 = 5 ohms, R2 = 7.5 ohms.
Rt = 5+7.5 = 12.5 ohms.
Applying Ohm's law,
V = IRt................... Equation 2
Where V = Voltage, I = current.
make I The subject of the equation
I = V/Rt.............. Equation 3
Given: V = 25 V, Rt = 12.5 ohms.
Substitute into equation 3
I = 25/12.5
I = 2 A.
Now,
Voltage drop across the 7.5 ohms resistor = R2×I
Voltage drop across the 7.5 ohms resistor = 7.5×2
Voltage drop across the 7.5 ohms resistor = 15 V
The velocity of a particle moving along the x axis is given for 1> 0 by v: = (32.0t - 2.00t^3) m/s,
where t is in s. What is the acceleration of the particle when (after t = 0) it achieves its maximum
displacement in the positive x direction?
The acceleration of the particle when it achieves its maximum displacement in the positive x-direction is 32 m/s²
To calculate the acceleration of the particle, we need to differentiate the expression for the velocity.
Given:
v = 32t-2t³differentiate v with respect to t
dv/dt = a = 32+2(3)t²dv/dt = 32+6t²................... Equation 1When the particle achieves its maximum displacement,
t = 0 sSubstitute these value of t into equation 1
dv/dt = 32+6(0²)dv/dt = 32 m/s²Hence The acceleration of the particle when it achieves its maximum displacement in the positive x-direction is 32 m/s²
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name the planet which is nearest to sun
Answer:
So, Mercury is the closest planet to the Sun.
Explanation:
find the value of currents through each branch
Answer:
the branch currents are as follows:
top left: I2 = 0.625 A
middle left: I1 = 2.500 A
bottom left: I1-I2 = 1.875 A
top center: I2+I3 = 2.500 A
bottom center: I2+I3-I1 = 0 A
right: I3 = 1.875 A
Explanation:
You can write the KVL equations:
Top left loop:
I2(4) +(I2 +I3)(2) +I1(1) = 10
Bottom left loop:
(I1-I2)(4) +(I1-I2-I3)(2) +I1(1) = 10
Right loop:
(I2+I3)(2) +(I2+I3-I1)(2) = 5
In matrix form, the equations are ...
[tex]\left[\begin{array}{ccc}1&6&2\\7&-6&-2\\-2&4&4\end{array}\right]\cdot\left[\begin{array}{c}I_1\\I_2\\I_3\end{array}\right] =\left[\begin{array}{c}10\\10\\5\end{array}\right][/tex]
These equations have the solution ...
[tex]\left[\begin{array}{c}I_1\\I_2\\I_3\end{array}\right] =\left[\begin{array}{c}2.500\\0.625\\1.875\end{array}\right][/tex]
This means the branch currents are as follows:
top left: I2 = 0.625 A
middle left: I1 = 2.500 A
bottom left: I1-I2 = 1.875 A
top center: I2+I3 = 2.500 A
bottom center: I2+I3-I1 = 0 A
right: I3 = 1.875 A
_____
This can be worked almost in your head by using the superposition theorem. When the 5V source is shorted, the 10V source is supplying (I1) to a circuit that is the 4 Ω and 2 Ω resistors in parallel with their counterparts, and that 2+1 Ω combination in series with 1 Ω for a total of a 4Ω load on the 10 V source. That is, I1 due to the 10V source is 2.5 A, and it is nominally split in half through the upper and lower branches of the circuit. There is no current flowing through the (shorted) 5 V source branch.
When the 10V source is shorted, the 5V source is supplying a 4 +4 Ω branch in parallel with a 2 +2 Ω branch, a total load of 8/3 Ω. This makes the current from that source (I3) be 5/(8/3) = 15/8 = 1.875 A. There is zero current from this source through the 1 Ω resistor.
Nominally, the current from the 5V source splits 2/3 through the 2 Ω branch and 1/3 through the 4 Ω branch.
Using superposition, I2 = I1/2 -I3/3 = (2.5 A/2) -(1/3)(15/8 A) = 0.625 A. This is the same answer as above, without any matrix math.
(I1, I2, I3) = (2.5 A, 0.625 A, 1.875 A)
__
It helps to be familiar with the formulas for resistors in series and parallel.
