Answer:
e)
Explanation:
Let's get first the values of the currents for the three cases.i)
The battery forms a series circuit with its internal resistance and the 1.4 Ω resistor. Since the current is the same at any point of the circuit, and the sum of all voltages along a closed circuit must be zero, we can apply Ohm's Law in each resistor, as follows:[tex]V = I*r_{i} + I*R_{1} (1)[/tex]
Replacing V, ri and R₁ by their values, we can solve for the current I as follows:[tex]I_{i} = \frac{V}{r_{int} + R_{i}} = \frac{1.5V}{0.1 \Omega + 1.4 \Omega} = 1.0 A (2)[/tex]
ii)
Since the voltage of the battery is 4.0 V (open circuit voltage), and it falls to 3.6 V when is connected to a 1.8Ω resistor, this means that the voltage through the resistor must be 3.6 V, due to the sum of all voltages along a closed circuit must be zero.So, we can find the current through the circuit, applying Ohm's Law to the 1.8Ω resistor, as follows:[tex]I_{ii} =\frac{V_{term} }{R_{ii} } =\frac{3.6V}{1.8 \Omega} = 2.0 A (3)[/tex]
iii)
Since the 12.0 V battery has a terminal voltage of 11.0 , this means that the voltage through the internal resistance of 0.2 Ω, must be 1.0 V.So we can find the current Iiii, applying Ohm's Law to the internal resistance value, as follows:[tex]I_{iii} =\frac{V-V_{term}}{r_{int} } =\frac{12.0 V- 11.0 V}{0.2 \Omega} =\frac{1.0V}{0.2\Omega} = 5.0 A (4)[/tex]
So, the highest current is the Iiii, followed by Iii and Ii, which is stated by e).A 34kg crate resting on a horizontal surface is pushed as shown. If the coefficient of static friction s between the surfaces is 0.25, what is the minimum force (Fs) required to start the motion?
1
a.
1332.80N
b.
83.30N
c.
8.50N
d.
136.00N
Heeelppp plzz
Answer:
D (not so sure, look in the explanation and judge yourself)
Explanation:
Assume that the acceleration due to gravity is 9.81 m/s^2 downwards
Minimum force required = 0.25 x 34 x 9.81
= 83.385 N
So technically the force need to be greater than 83.385 so the answer should be d, not really sure if it should be b though really depends on the acceleration due to gravity.
How much work is done by 15 kW engine during 3.5 min? Explain the answer if you can plz
Answer:
W = 3.15 · 10⁶ J
Explanation:
We know that power is calculated using the formula:
P = W/twhere P = power (W), W = work (J), and t = time (s)We can derive a formula for work using this formula by multiplying t to both sides of the equation.
W = PtLet's convert 15 kW to W.
15 kW → 15,000 WLet's convert 3.5 min to s.
3.5 min → 210 sSubstitute these values into the formula for work and solve for W.
W = Pt W = (15,000 W) · (210 s) W = 3,150,000 J W = 3.15 · 10⁶ JThis is the amount of work done by a 15 kW engine in 3.5 minutes.
Can someone answer this fast please
How much heat does it lose to change 126 g of water from 67°C to 37°C?
Explanation:
convert gram into kg q means amount of heat lost
Radio waves have a longer wavelength than microwaves. What else is true
about radio waves?
Assume that a person bouncing a ball represents a closed system. Which
statement best describes how the amounts of the ball's potential and kinetic
energy change?
O A. The ball's kinetic energy increases as it falls and its potential
energy decreases.
B. The ball's potential energy decreases as it rises and its kinetic
energy increases.
C. Both the kinetic and potential energy of the ball decrease.
D. Both the kinetic and potential energy of the ball increase
Answer:
I know that it is A
Explanation:
How do sociologists view the categories of race, class, and gender?
Multiple Choice
1. inherent and inevitable
2. socially constructed
3. unchangeable and perpetual
4. natural and biologically determined
Answer:
2. Socially constructed
Explanation:
Enter your passwor
Accounts
What happens when you move two
objects far apart from each other?
A. The force of gravity increases.
B. The force of gravity decreases.
C. Distance does not affect the force of gravity.
D. The friction between the two objects will increase.
Answer:
C. Distance does not affect the force of gravity.
The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm thick and completely fills the region between the plates. What is the dielectric constant of the dielectric?
Answer:
The square plates of a 3000-pF parallel-plate capacitor measure 40 mm by 40 mm and are separated by a dielectric that is 0.29 mm thick and completely fills teh region between the plates.
Explanation:
TOINETS
Assuming that distances are
equal, which of the following
objects would have the MOST
gravitational force with you?
A. Jupiter
NETTUNE
B. Earth
UNIVERSE
C. Sun
Answer:
The sun.
Explanation:
The sun has the most gravitational pull.
5j-Tj=6j+3 Tj
Determine the value of T from the given vector
1. An astronaut is getting ready to explore. If his mass is 60 kg, what is his weight
on Earth?
Answer:
The mass of an object is the same on Earth, in orbit, or on the surface of the Moon. ... 1N=1kg ⋅m/s2. 1 N = 1 kg · m/s 2 . ... The gravitational force on a mass is its weight. ...Explanation:
ILY:)Which is NOT true of electricity?
It allows us to see with candles and kerosene lamps.
Humans did not invent electricity.
It’s a form of energy.
Lightning and thunder are examples of electricity.
plsssssssssss answer correct plss i want correct answers only not in a meen way
Answer:
option A is correct answer of this question
Explanation:
=> it allows us to see with candles and kerosene lamps
hope it helps
The wavelength of radio waves sent out by an AM station is 600 meters (v = 3.0 x 10^8 m/s). At what frequency is the radio station broadcasting?
Answer:
500,000 hertz
Explanation:
Wavelength= 600 meters
Velocity(b) = 3 × 10^8
Frequency=?
Therefore the frequency can be calculated as follows
Velocity= frequency × wavelength
Frequency= 3 × 10^8/600
= 500,000 hertz
Hence the frequency is 500,000 hertz
3. A backpack weighs 8.2 N and has a mass of 5 kg on the moon. What is t
strength of gravity on the moon?
8.2 N
A baseball is traveling (+30m/s) and is hit by a bat. It leaves the bat traveling (−40m/s). What is the change in its velocity?
Unlike some others, this is any choice, so not just 4 choices!
Answer:
Explanation:
The change must be 30 - - 40 which means it came in a 30 meters / second and went out in the opposite direction at 40 meters / second
The change is 70 m/sec.
You could show it to be - 70 meters per second as well. That's done by making the outgoing direction minus.
Delta v = vf - vi.
Now it depends on which way you define vf and vi.
What is the expermintal example of Zeeman effect?
Answer:
When the spectral lines are absorption lines, the effect is called inverse Zeeman effect.
Which examples are ways that models can help scientists solve problems? Check all that apply.
Answer:
These are the 4 correct answers that should be on your test.
A. A model can represent something very large like the solar system.
B. A model can represent something very small like a single cell.
C. A model can represent something very complex like the flow of energy in an ecosystem.
D. A model can represent something that cannot be seen or touched.
Explanation:
The National Institute of Health is testing sensors which measure the energy felt by goalkeepers when blocking soccer balls coming at them and the velocity of soccer balls. One sensor measuring velocity is inside a 16 ounce soccer ball, which is kicked by a player at an initial velocity of 31 m/s. The ball bounces off the goalkeeper at a final velocity of 2.25 m/s. How much energy in Joules should the sensor say the goalkeeper absorbed, not accounting for wind and drag
Answer:
E = 216.76 J
Explanation:
The amount of energy absorbed by the goalkeeper will be equal to the difference between the initial and the final kinetic energy of the ball.
[tex]Energy\ Absorbed = Initial\ Kinetic\ Energy - Final\ Kinetic\ Energy\\Energy\ Absorbed = E = \frac{1}{2}mv_{i}^2 - \frac{1}{2}mv_{f}^2\\E = \frac{1}{2}m(v_{i}^2 - v_{f}^2)\\[/tex]
where,
m = mass of ball = (16 ounce)(0.0283495 kg/1 ounce) = 0.4535 kg
vf = final velocity = 2.25 m/s
vi = initial velocity = 31 m/s
Therefore,
[tex]E = \frac{1}{2}(0.4535\ kg)[(31\ m/s)^2 - (2.25\ m/s)^2][/tex]
E = 216.76 J
An automobile is traveling on a long, straight highway at a steady 80.0 mi/h when the driver sees a wreck 190 m ahead. At that instant, she applies the brakes (ignore reaction time). Between her and the wreck are two different surfaces. First there is 100 m of ice, where the deceleration is only 1.20 m/s2 . From then on, it is dry concrete, where the deceleration is a more normal 6.80 m/s2 .
a) What was the car’s speed just after leaving the icy portion of the road?
b)What is the total distance her car travels before it comes to a stop?
c)What is the total time it took the car to stop?
Answer:
a) The car’s speed just after leaving the icy portion of the road is the first part
Explanation:
Two football players collide head-on in midair while chasing a pass. The first player has a 110 kg mass and an initial velocity of 4.40 m/s in the positive x direction, while the second player has a 135 kg mass and initial velocity of 3.30 m/s in the negative x direction.
Required:
What is the x component of their velocity just after impact if they cling together?
Answer:
v = 0.16 m/s in the positive x direction.
Explanation:
Assuming no external forces acting during the collision, total momentum must be conserved.Initial momentum can be expressed as follows:[tex]p_{o} =m_{1} * v_{o1} + m_{2} * v_{o2} (1)[/tex]
Since both players move only horizontally, (1) can be expressed in terms of the velocities in the x- directions only, taking into account that player 1 moves in the positive x-direction, and player 2 in the opposite direction, and assuming that positive velocities are in the positive x-direction also:[tex]p_{o} =110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) (2)[/tex]
Since total momentum must be conserved, the final momentum must be equal to the initial one.We know that both players cling together after colliding, so the collision is totally inelastic.So, the final momentum can be expressed as follows:[tex]p_{f} =( m_{1} + m_{2} )* v_{f} (3)[/tex]
Replacing by the givens in (3), we get:[tex]p_{f} =( m_{1} + m_{2} )* v_{f} = (110 kg + 135 kg)* vf (4)[/tex]
Since (3) must be equal to (4) we can solve for vf, as follows:[tex]v_{f} = \frac {110 kg * 4.4 m/s + 135 kg * (-3.3 m/s) }{(110 kg + 135 kg)} = 0.16 m/s (5)[/tex]
Since the initial momentum has only component in the x-direction, the final one must have component in the x-direction only too.This means that vf is in the x-direction, and due to it is positive, it must aim in the positive x-direction.So, vfx = +0.16 m/sWILL MARK YOU BRAINLIEST
Describe the importance and reliability of systems that use digital signals to store information. (Include the advantages of storing information digitally, as opposed to physical copies.)
Describe three instances of digital transmission and storage in your everyday life. Be sure to explain how you know data transmission or storage is occurring in each instance.
Explain how radio waves and digital signals will store and transmit this assignment to your instructor.
Describe how wave behavior and interactions can affect the quality of a signal received by a mobile device.
A medical office is planning to convert to an electronic database to store patient information. What are the pros and cons to making changes in this form of storage of personal medical information instead of written physical files? Provide evidence based on your knowledge of digital storage to support your reasoning.
As seen in the lesson video, solar photovoltaic technologies help provide clean electrical energy. Using the video animation as a guide, diagram and label the absorption of photons and production of electrons (photoelectric effect) used in solar PV systems. Include a screen shot or picture of your diagram below.
Digital signals are a more reliable form of transmitting information because an error in the amplitude or frequency value would have to be very large in order to cause a jump to a different value. Signals are composed of infinite possible values. ... Sound signals can vary smoothly in volume and pitchAdvantages to using digital signals, including digital signal processing (DSP) and communication systems, include the following:
Digital signals can convey information with less noise, distortion, and interference.
Digital circuits can be reproduced easily in mass quantities at comparatively low costs.
Answer:
it is easy to change the data if you have the right computer programs
Explanation:
A water park rider (mass = 20.0 kg) starts from rest at the top of a 48.0-m tall
water slide (A). The height at B is 16.0 m. Assuming mechanical energy
conservation, determine the potential energy (PE) and kinetic energy (KE) values
at locations A, B and C. Use g = 10.0 N/kg.
This question involves the concept of the law of conservation of energy.
The potential energy at A,B,C is "9.6 J","3.2 KJ","0 KJ", respectively.
The kinetic energy at A,B,C is "0 KJ","6.4 KJ","9.6 KJ", respectively.
What is the law of conservation of energy?The law of conservation of energy states that total energy of the system at any instant must remain constant.
At point AAt point A, the rider is at rest at a height of 48 m on top of the slide. So the kinetic energy of the rider must be 0 KJ. And the potential energy will be given as follows:
[tex]P.E=mgh[/tex]
where,
P.E = potential energy = ?m = mass = 20 kgg = 10 m/s²h = height = 48 mTherefore,
[tex]P.E = (20\ kg)(10\ m/s^2)(48\ m)\\[/tex]
P.E = 9600 J = 9.6 KJ
At point B
The potential energy at point B will be:
[tex]P.E=mgh[/tex]
where,
P.E = potential energy = ?m = mass = 20 kgg = 10 m/s²h = height = 16 mTherefore,
[tex]P.E = (20\ kg)(10\ m/s^2)(16\ m)\\[/tex]
P.E = 3200 J = 3.2 KJ
According to the law of conservation of energy the rest of the total energy shall be converted to kinetic energy:
K.E = 9.6 KJ - 3.2 KJ
K.E = 6.4 KJ
At point CAt the lowest point C of the ride, the potential energy will become 0 KJ, and the whole energy shall be converted to kinetic energy, that is 9.6 KJ.
Learn more about the law of conservation of energy here:
https://brainly.com/question/12050604
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3.
A stone is thrown vertically upward at a velocity of 10 m-s-' from the top of a tower
of height 50 m. After some time the stone passes the edge of the tower and strikes
the ground below the tower. Ignore the effects of friction.
3.1 Calculate the time taken by the stone to reach its maximum height above the
ground
3.2 Calculate the maximum height the stone reaches above the tower.
3.3 Sketch the position time graph for the motion of the stone.
3.4 On its way down, the stone takes 0,1 s to pass a window of height 1,5 m, as shown
in the diagram above. Calculate the distance y, from the top of the window to the
ground
Answer:
1 one is answer when we throw
Explanation:
Becouse we got the 50 m
When a baseball hits a
baseball glove, what is the
reaction force?
A. The ball pushes onto the glove.
B. The glove pushes against the ball.
C. The ball falls to the ground.
at for every
reaction.
all at the
his glove.
why efficiency of electrons causes negative charge
Answer:
Since opposite charges attract each other, the negatively charged electrons are attracted to the positively charged protons. ... Together, all of the electrons of an atom create a negative chargethat balances the positive charge of the protons in the atomic nucleus.
Explanation:
which answer is correct.
Answer:
I would say B but I could be wrong
Explanation:
what will it be the critical angle if light is incident from glass n=1.5 in to the air n=1
Answer:
The formula, which is fairly easy to derive, is:
The sine of the critical angle = refractive index of the “refracting medium” divided by refractive index of the “incident medium”.
In this case the “refractive medium” is air and the “incident medium” is glass.
The refractive index of air is about 1 (almost exactly).
So, in this case, the sine of the critical angle is 1 divided by 1.5 = 0.6667.
You will find the answer, from sine tables, to be approximately 41.81 degrees.
Remember that the refractive index of air is slightly more than 1. Using a better value for refractive index of air, I get the critical angle to be about
As Carlos and Manual both push a 4 kg box to the right across a rough floor, the box speeds up at a rate of 2.0 m/s2.(Hint, this is the acceleration.) If you assume that Manual pushes with a force strength of 8.0 N and the friction force of the floor on the box is 5.0 N, then what is the strength of the force that Carlos pushes on the box
Answer: 5 N
Explanation:
Given
Mass of box [tex]m=4\ kg[/tex]
acceleration of box [tex]a=2\ m/s^2[/tex]
Force applied by Manual [tex]F_m=8\ N[/tex]
Friction force [tex]f=5\ N[/tex]
The net force on the block is [tex]F_{net}=m\times a=4\times 2=8 \N[/tex]
Suppose [tex]F_c[/tex] is the force applied by Carlos
[tex]\Rightarrow F_m+F_c-f=F_{net}\\\Rightarrow F_c=F_{net}-F_m+f\\\Rightarrow F_c=8-8+5=5\ N[/tex]
The strength of the force that Carlos pushes on the box will be [tex]F_c=5\ N[/tex]
What is force?The force is defined as the external effort applied on any object to move it or to restrict it.
Here following information is given in the question:
Mass of the box m=4 kg
The acceleration of the box [tex]a=2\ \frac{m}{s^2}[/tex]
The force applied by the Manual [tex]F_m=8\ N[/tex]
The frictional force is [tex]F_f=5\ N[/tex]
The net force on the body will be calculated by
[tex]F_{net}=m\times a=4\times 2=8\ N[/tex]
The force that Carlos pushes on the box will be calculated by the equilibrium of the forces:
[tex]F_m+F_c-F_f=F_{net}[/tex]
[tex]8+F_c-5=8[/tex]
[tex]F_c=5\ N[/tex]
Thus the strength of the force that Carlos pushes on the box will be [tex]F_c=5\ N[/tex]
To know more about forces follow
https://brainly.com/question/388851
What does efficient mean in your own words in science
Answer:
Efficient means something that gives 100% accuracy.
