Answer:
d=v1t - .5at^2
d=4.88 x .872 - 0.5 x (4.88/0.872) x 0.872^2
d=4.255 - 2.12
d= 2.135m
Explanation:
acceleration is negative because she is slowing down.
Transcranial magnetic stimulation (TMS) is a noninvasive technique used to stimulate regions of the human brain. A small coil is placed on the scalp, and a brief burst of current in the coil produces a rapidly changing magnetic field inside the brain. The induced emf can be sufficient to stimulate neuronal activity. One such device generates a magnetic field within the brain that rises from zero to 1.5 T in 120 ms. Determine the induced emf within a circle of tissue of radius 1.6 mm and that is perpendicular to the direction of the field.
Answer:
0.125 volts
Explanation:
The induced emf can be sufficient to stimulate neuronal activity.
One such device generates a magnetic field within the brain that rises from zero to 1.5 T in 120 ms.
We need to find the induced emf within a circle of tissue of radius 1.6 mm and that is perpendicular to the direction of the field. The formula for the induced emf is given by :
[tex]\epsilon=-\dfrac{d\phi}{dt}[/tex]
Where
[tex]\phi[/tex] is magnetic flux
So,
[tex]\epsilon=-\dfrac{d(BA)}{dt}\\\\=2\pi r\times \dfrac{dB}{dt}\\\\=2\pi \times 1.6\times 10^{-3}\times \dfrac{1.5-0}{120\times 10^{-3}}\\\\=0.125\ V[/tex]
So, the induced emf is equal to 0.125 volts.
PLZZZZZ HELP MEHH ASAP!!!
Answer:
C
Explanation:
Copper is a conductor because its valence electrons can move freely from atom to atom.
Pressure is ______________ to the force applied.
inversely proportional
directly proportional
not related
Explanation:
inversely proportional
Answer:
directly proportional to force applied
A straight segment of wire has a length of 25 cm and carries a current of 5A. If the wire is perpendicular to the magnetic field of 0.60Tesla, then what is the magnitude of the magnetic force?
Answer:
The magnitude of the magnetic force acting on the conductor is 0.75 Newton
Explanation:
The parameters given in the question are;
The length of the straight segment of wire, L = 25 cm = 0.25 m
The current carried in the wire, I = 5 A
The orientation of the wire with the magnetic field = Perpendicular
The strength of the magnetic field in which the wire is located, B = 0.60 T
The magnetic force, 'F', is given by the following formula;
F = [tex]\underset{I}{\rightarrow }[/tex]·L×[tex]\underset{B}{\rightarrow }[/tex] = I·L·B·sin(θ)
Where;
[tex]\underset{I}{\rightarrow }[/tex] = The current flowing, I
L = The length of the wire
[tex]\underset{B}{\rightarrow }[/tex] = The magnetic field strength, B
θ = The angle of inclination of the conductor to the magnetic field
Where I = 5 A, L = 0.25 m, B = 0.60 T, and θ = 90°, we get;
F = 5 A × 0.25 m × 0.60 T × sin(90°) = 0.75 N
Therefore
The magnitude of the magnetic force, F = 0.75 N.
GIVING BRAINLIEST PLEASE HELP!!
-if you answer correctly ill give you brainliest which will give you 27pts-
Answer:
C. The lever applies three times more force than you hand can apply.
Explanation:
Since it's advantage is 3, that means you'll have to multiply the input of it by 3, making this apply 3x more force than your hand.
Hope this helped! <3
Source(s): Me and a bit of g*ogle for clarification
Why is a spherical bob preferred to bobs of other shapes for use in simple pendulum experiments
Answer
A spherical bob creates more control for the simple pendulum experiment. An irregular bob like a large piece of paper for instance, will create too much air resistance for a basic classical experiment to yield predictable results within the academic lab.
If it is known that a motor battery has an input voltage of 12V and a capacity of 6 Ah, how much power and resistor value is required to turn on 8 lamps with a parallel circuit, with the specifications of each lamp having a maximum voltage of 3V and an electric current of 140 mA? How long did all the lights go on until they off?
Answer:
Part A
The power to turn on the lamp, ∑P = 3.36 W
Part B
The Resistor required is approximately 8.04 Ohms
Part C
The time for all the lights to go out is approximately 21.43 hours
Explanation:
The input voltage of the motor battery , V = 12 V
The capacity of the battery, Q = 6 Ah
The number of lamps in parallel = 8 lamps
The maximum voltage of each lamp, = 3 V
The electric current in each lamp = 140 mA
The energy available in a battery, E = Q × V
For the battery, we have;
E = 6 Ah × 12 V = 72 Wh
The energy available in a battery, E = 72 Wh
Part A
The power used by the lamps, [tex]P_i[/tex] = [tex]I_i[/tex] × [tex]V_i[/tex]
∴ The total power used by the lamp, ∑P = 8 × 0.14 A × 3 V = 3.36 W
The power to turn on the lamp, ∑P = 3.36 W
Part B
The resistance required, is given as follows;
Resistor required = (Battery voltage - Lamp voltage)/(The sum of bulb current)
∴ Resistor required = (12 V - 3 V)/(8 × 0.14 A)
The Resistor required = 8.03571429 Ohms
The Resistor required ≈ 8.04 Ohms
Part C
The time for all the lights to go out = The time for the lamps to use all the power available in the battery
The time for all the lights to go out, t = E/∑P
∴ t = 72 Wh/(3.36 W) = 21.4285714 h
∴ The time for all the lights to go out, t ≈ 21.43 h
The time for all the lights to go out = The time for the lamps to use all the power available in the battery = t ≈ 21.43 h
∴ The time for all the lights to go out ≈ 21.43 hours.
a container of mass 200kg contains 160cm
of liquid. The total mass of the container and liquid is 520g. what is the density of the liquid?
Answer:
mass of liquid = total mass - mass of container
m = 52000kg - 200kg
m = 519800
D = m/v
D = 519800/160
D = 3,248.75 kgm-³
How many people does it take to change a lightbulb?
If the skateboarder started at the top of the ramp at 6 m and had a mass of 30 kg, and made it to the bottom going 8 m/s, how much energy was lost to friction?
Answer:
i dont know
Explanation:
sorry
Find the direction of the sum of
these two vectors:
How is capacitance related to the distance between the plates of a capacitor?
It is directly proportional, so the capacitance increases as the distance increases.
It is inversely proportional, so the capacitance increases as the distance increases.
It is directly proportional, so the capacitance decreases as the distance increases.
It is inversely proportional, so the capacitance decreases as the distance increases.
Answer:C
Explanation: I studied, and C is correct
Answer:
D
Explanation:
As an airplane takes off, the air flows across the wings of the airplane. Which of the following would be the best description? I. The air flow across the top of the wing is greater than the air flows across the bottom of the wing. II. The air flow across the top and bottom of the wing is the same. III. The lift force is present because the pressure across the top is less than the pressure across the bottom of the wing.
Answer:
III. The lift force is present because the pressure across the top is less than the pressure across the bottom of the wing.
Explanation:
Which of the following correctly describes the relationship between current and voltage as the voltage of a battery increases. Remember that Ohm's Law
states: I = x
As voltage increases, current decreases because current and voltage are inversely proportional.
o As voltage increases, current decreases because current and voltage are directly proportional
As voltage increases, current increases because current and voltage are directly proportional
Answer:_COC1\/2+_H\/2O>_HC1+CO\/2
Explanation:
Need help asap
HELLLP! PHYSICAL SCIENCE GUYS THANK YOU!!
True or False: A balanced force acts on different objects, and action-
eaction forces act on the same object. *
A. True
B. False
Answer:
true
Explanation:
according to the Newton's third law
A wave has a wavelength of 2 meters and a frequency of 1.5 hz. What is its speed
Answer:
3m/s is the answer.
Explanation:
f = c/λ
f = frequency
c = speed (m/s)
λ = wavelength
f = c/λ
1.5 = c/2
c = 3m/s
PLEASE HELP WILL MARK BRAINLIEST PLS
Answer: 2
Explanation:
What force is keeping the Earth in orbit around the Sun? * HELP FAST PLEASE.
1 point
A Centripetal Force due to gravity.
B Inertia due to gravity.
C Friction due to gravity.
D Magnetic Force due to gravity.
centripetal force acts *
1 point
A in the same direction as tangential speed.
B perpendicular to tangential speed but in the same plane.
C in the direction opposite tangential speed.
D perpendicular to the plane of circular motion.
Answer:
magnetic force due to gravity
Explanation:
nowno that is because that's what the geography teacher taught us back in don't remember but it's true
A 100 watt bulb with 60 volts has a current flow of how many Amps?
Answer:
I = 1.666... amps
Explanation:
P = I*V or Power = Current * Voltage
(100 watts) = I * (60 Volts)
I = 1.666... amps
An athletes heart beats 62 times per minute. What is the frequency of her heart beat?
Answer:
22
Explanation:
bc it just is
(Click the picture)
What is the source of energy that will send the arrow flying toward the target?
A- The archers ability to aim correctly
B- The arrow’s distance from the ground
C- The springiness of the bow
D- The time it takes to release the bow
Answer:
a
Explanation:
cause her hand is straight and she followed the direction it sould be correctly unless I am messing something
When copper combines with oxygen to form copper(II) oxide, the charge of the copper ion is
how many nucleons does sulphur have
Answer:
32
Explanation:
Answer:
32
Explanation:
Sulfur has 16 protons and 16 neutrons. The atomic number is roughly 32. Therefore, 16 + 16 = 32 nucleons.
Here is a list of ways of producing electricity
A ) Wind farms
B ) Coal fired power stations
C ) hydroelectric power stations
D ) nuclear power stations
E ) gas fired power stations
F ) tidal power stations
G) using geothermal energy
(1) State which of these produces clean electricity
(2) State which of these uses fossils fuel
(3) state which of these uses a renewable energy resources
Please help me
Please do not answer from links
Urgent !!!!!!
Will give the brainliest!
* please answer correctly
Answer:
1) A,B,F,G
2)B,D,E
3) A,C,F,G
Explanation:
Which of the following types of energy is not associated with a car engine?
A. Kinetic
B. Heat
C. Sound
D. Light
Answer:
D
Explanation:
Does not assosicate with Light
select three parts of a circular saw
spindle
trigger
base
handle
key
chuck
Answer:
handle, trigger, spindle
What I ferromagnetism??
Answer:
Ferromagnetism is a kind of magnetism that is associated with iron, cobalt, nickel, and some alloys or compounds containing one or more of these elements. It also occurs in gadolinium and a few other rare-earth elements.
Explanation:
Hope this helped Mark BRAINLIEST!!!
Two 10.-ohm resistors have an equivalent resistance of 5.0 ohms when connected in an electric circuit with a source of potential difference. Using circuit symbols found below, draw a diagram of this
circuit.
The resistors are connected in parallel between the terminals of a battery.
Note: If those resistors are connected in parallel, then their equivalent resistance is already 5 ohms, even if they're still in the drawer or in a box on the shelf. They don't have to be connected to a source of voltage for that to happen.
Write down 2 differences between electrical conductors and electrical insulators.
Answer:
electrical conductors help electric current to pass through it
electrical conductors are usually made of any metal
electrical insulator don't help electric current to pass through it
electrical insulators are made of non metals
hope it helped you
Explanation:
conductors allows free flow of electrons from one atom to another.
insulators restrict free flow of electrons
conductors allow electrical energy to pass through them
insulators do not allow electrical energy to pass through them