Questions
2.
Rewrite the following quantities using suitable
prefixes
5000 000
I have two questions
What is the current of a 24 ohm heating coil in a coffee maker plugged into a 120v outlet.
What voltage will produce 6 amps through a circuit that has 10 ohms of resistance.
plz help
a) The electric current flowing through it is 5 amp.
b) The voltage will produce by an amount of 60 volt.
What is electric current?A stream of charged particles, such as electrons or ions, travelling through an electrical conductor or a vacuum is known as an electric current. The net rate of electric charge flowing through a surface or into a control volume is how it is calculated.
a) When a 24 ohm heating coil in a coffee maker plugged into a 120v outlet, electric current flowing trough it = 120 v/24 ohm = 5 amp.
b) When e 6 amps through a circuit that has 10 ohms of resistance, voltage produced in it = 6 amp × 10 ohm = 60 volt.
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An engineer is trying to determine the height from which she needs to release a 52kg wrecking ball
such that the wrecking ball will be traveling 12.3m/s when it strikes the building at the position
shown. Neglect drag.
The height from which the engineer needs to release the ball is : 11.811 m
Given data:
Mass of wrecking ball = 52 kg
velocity of wrecking ball ( Vf ) = 12.3 m/s
Initial velocity of ball ( Vi ) = 0 m/s
final height ( hf ) = 4.1 m
Determine the height from which the engineer releases the ballApplying the principle of energy conservation
Initial energy = final energy
= 1/2 mV²i + mghi = 1/2 mV²f + mghf ----- ( 1 )
given that Vi = 0 also cancelling out m from both sides
Equation ( 1 ) becomes
= 0 + hi = V²f / 2g + hf
therefore : hi = ( 12.3 )² / 2 * 9.81 + 4.1
= 151.29 / 19.62 + 4.1
= 11.811 m
Hence we can conclude that The height from which the engineer needs to release the ball is : 11.811 m
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Attached below is the missing image related to your question
how are force and mass related
Newton's second law of motion can be formally stated as follows: The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Please help me with this I’ll mark you Brainly
The picture is above
Answer:
D is correct.
The upward force on the ball must be the same at both locations:
F = M a = 0 = F(upwards) - F(downwards)
If the ball is not being accelerated the upward force must equal the downward force on the ball.
Please help in my home work.
change 120°F to celsius scale.
Answer:
48
Explanation:
I'm not sure if this is right I'm so sorry if its not
120 °F
to find:120 Fahrenheit as Celsius.
solution:[tex]c = (f - 32) \times \frac{5}{9} [/tex]
[tex]c = (120 - 32) \times \frac{5}{9} [/tex]
[tex]c = \frac{440}{9} [/tex]
[tex]c = 48.88889 \: degree \: celcius[/tex]
Before a diver jumps off of a diving board she has 7500J of Gravitational energy. What is the maximum amount of kinetic energy the diver will have just before she hits the water?
Answer:
i think it was 7500 j . beacause sometimes we can say that U=K after that thing is near the floor
The maximum amount of kinetic energy the diver will have just before she hits the water will be the same as the gravitational potential energy before take-off. Maximum kinetic energy is also 7500Joules
Gravitational energy is the energy possessed by an object by virtue of its position.
It is expressed according to the formula:
GPE = mgh
m is the mass of the object
g is the acceleration due to gravity
h is the height
If a diver has Gravitational energy of 7500Joules before the diver jumps off, the maximum amount of kinetic energy the diver will have just before she hits the water will be the same as the gravitational potential energy before take-off.
GPE = kinetic energy at the bottom = 7500Joules
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Four model rockets are launched in a field. The mass of each rocket and the
net force acting on it when it launches are given in the table below.
Rocket
Mass (kg)
Force (N)
1
4. 25
120
2
2
3. 25
120
3
5. 50
120
4
4. 50
120
Which rocket has the highest acceleration?
A. Rocket 3
B. Rocket 1
C. Rocket 4
D. Rocket 2
In the given four models of rockets, the rocket with the highest acceleration is rocket 2.
Acceleration of the rocketsAcceleration is the rate of change of velocity with time. The acceleration of the rockets can also be determined from Newton's second law of motion with the applied force and mass of each rocket as shown below;
F = ma
where;
F is the applied forcem is the massa is the accelerationa = F/m
Rocket 1a = 120/4.25
a = 28.24 m/s²
Rocket 2a = 120/3.25
a = 36.92 m/s²
Rocket 3a = 120/5.5
a = 21.82 m/s²
Rocket 4a = 120/4.5
a = 26.7 m/s²
Thus, the rocket with the highest acceleration is rocket 2.
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How do you determine the effect of initial speed on the horizontal distance traveled by a projectile?
x(t)=voₓ.t = vo cos α.t
the greater the initial speed, the further the distance obtained
The horizontal distance traveled by a projectile (also known as the range of the projectile) is determined by the initial speed of the projectile, as well as other factors such as the angle at which it is launched and the gravitational acceleration acting on it.
What is a projectile?A projectile is an object that is projected into the air and follows a parabolic path under the influence of gravity. Examples of projectiles include balls thrown or kicked in sports, bullets fired from guns, and rocks or other objects that are thrown or dropped.
To determine the effect of the initial speed on the horizontal distance traveled by a projectile, you can use the following formula:
[tex]Range = (Initial speed)^2 * sin(2 * Launch angle) / gravitational acceleration[/tex]
This formula shows that the range of a projectile is directly proportional to the initial speed of the projectile squared, and is also affected by the launch angle and gravitational acceleration.
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According to Newton’s law inertia what will happen to the ballon when the force of gravity equals the upward force?
Answer:
It will stop moving.
At a distance of 100 km from a small,
electrically charged asteroid, it is found
that there is an electric field of 300 V/m. How much charge does the asteroid
carry?
Answer:
E = K Q / R^2 electric field due to charge Q
Q = E * R^2 / K = 300 N / C * (10^5)^2 m^2 / (9.0E9 nt-m^2/C^2)
Q = 333 C
What happens to the momentum of an object when velocity is kept the same and the mass is increased?
The orbital motion of a deep water wave extends to a depth equal to.
A book with a mass of 1 kg is dropped from a height of 3 m. what is the potential energy of the book when it reaches the floor
Answer:
PE=mgh
Where; m is the mass
g is the gravitational force.
h is the height.
the mass is 1kg, the acceleration due to gravity has a constant value of 10ms² . And the height is 3m.
mgh= 1 x 10 x 3 = 30Joules
Which force is represented by the arrow at A?
A) Force of Friction
B) Force of gravity
C) Normal Force
D) Tension Force
Which force is represented by the arrow at A?
B) Force of gravityLet us understand the situation first and then we will understand which type of force is represented by arrow A
The line to which arrow A is being touched is the ground and the block is being slid down a slope.The arrow A is representing the force that is being applied by the earth on the block and that force is Gravitational Force. So, Option B is the correct choice!!~Raymond cattell created the 16pf self-inventory assessment by first taking 4,504 personality traits and removing all of the __________. a. nouns b. homonyms c. synonyms d. antonyms please select the best answer from the choices provided a b c d
Raymond Cattell created the 16pf self-inventory assessment by first taking 4,504 personality traits and removing all of the synonyms.
What exactly is a synonym?This is defined as a word or phrase that has a similar meaning to another word or phrase.
By removing synonyms from the personality traits, Raymond Cattell created the 16PF self-inventory assessment.
Hence Raymond Cattell created the 16pf self-inventory assessment by first taking 4,504 personality traits and removing all of the synonyms.
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Some students are investigating how resonance works using two tuning forks. Put the steps in the process in the correct order.
1.
Hold the vibrating tuning fork right beside the other one.
2.
The second tuning fork will begin to vibrate at the same rate as the first one.
3.
Strike one tuning fork on the edge of the table to make it vibrate.
Answer:
1. Strike one tuning fork on the edge of the table to make it vibrate.
2. Hold the vibrating tuning fork right beside the other one.
3. The second tuning fork will begin to vibrate at the same rate as the first one.
Explanation:
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For a substance to change from a liquid to a solid, what must happen to its
particles?
Answer:
The answer is see the person above is correct They must lose enough other kinetic energy so that the attractions between them hold in place has been vibrate
Explanation:Got it correct
For a substance to change from a liquid to a solid, the particles must lose enough of their kinetic energy so that the attractions between them hold in place as they vibrate. Thus, the correct option is C.
What is Kinetic energy?Kinetic energy is the energy which an object has because of its motion. If we want to accelerate an object, then it is required to apply a certain amount of force. Applying a force requires us to perform work. After work has been done on the object, then the energy has been transferred to the object, and the object will be moving with a new constant speed and no acceleration.
For a substance to change from a liquid to a solid, the particles must lose enough of their kinetic energy so that the attractions between them hold in place as they vibrate.
Therefore, the correct option is C.
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A roller coaster car is released from a standing start at the top of a 20.0-m hill. The car rolls down the hill to a point 10.0 m above the ground, then up a second hill to 15.0 m, and then down again to point X at 8.00 m above the ground. Use what you know about the sum of the kinetic and potential energies to find the car's speed at X.
A.
11.7 m/s
B.
12.5 m/s
C.
15.3 m/s
D.
19.8 m/s
Answer:
21.5 i did the assesment
Explanation:
1.1
Which of the following pairs can be classified as vectors?
A. Friction and mass
B. Mass and inertia
C. Inertia and weight
D. Weight and friction
Answer:
D
Explanation:
Weight and friction are paired as vectors
Find the magnitude of the sum
Answer:
8.57 m
Explanation:
To solve the problem, we have to decompose the two vectors along the two directions first:Vector A:- x component: Ax = +9.66 m- y compoment: Ay = 0 (the vector lies along the x-axis)Vector B:- x component: - y component: So now we can find the sum of the two vectors by adding the components along each axis:And the magnitude of the sum is given by Pythagorean theorem:
What is the equation for the speed of a wave? Identify each variable.
Answer:
Wave speed is related to wavelength, frequency, and period by the equation wave speed = frequency x wavelength.
Explanation:
I hope my answer helped <3 Have a nice day
The equation for the speed of the wave is v = λ × f. The speed of a wave depends on wavelength and frequency.
The rate at which a wave moves across a medium is referred to as its speed. It displays the speed at which the wave's disruption or energy spreads. The characteristics of the medium a wave travels through affect its speed.
The equation for the wave's speed (v) for a mechanical wave, such as one moving via a string or a spring, is as follows:
v = λ × f
Here:
v = speed of the wave
λ = wavelength of the wave
f = frequency of the wave
Hence, the equation for the speed of the wave is v = λ × f. The speed of a wave depends on wavelength and frequency.
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The "Time Bandit" is one of the many fishing vessels from the television series "Deadliest Catch". While searching for crab during one of its crabbing excursions, it travels 15 km north and then 7 km west from its starting position. What was his straight line displacement during this part of its trip? Be careful to read the units I gave you!
Answer:
Displacement = 16.55 km
Explanation:
The straight line displacement can be found by finding the resultant of both the displacements. The displacements given to us are 15 km north and 7 km west. Since, west and north directions are perpendicular to each other. Therefore, the displacements will also be perpendicular and they can be modelled as the rectangular components of resultant straight line displacement. So, the resultant straight line displacement can be found by using Pythagorean Theorem:
Displacement = √[(15 km)² + (7 km)²]
Displacement = 16.55 km
Hence, his straight line displacement during this part of trip will be 16.55 km
__________ is the process of altering light so that the waves are all oscillating in the same plane.
Polarization
Reflection
Diffraction
Refraction
Sofia needs to go to the grocery store. She leaves her house, walks 1 mi north
to the store, buys some bread and fruit, and walks back home. Which of the
following is true of Sofia's trip to the store and back?
O A. The total distance traveled is 1 mi.
O B. The total distance traveled is O mi.
C. The total displacement is O mi.
D. The total displacement is 1 mi north.
HELP ME PLEAS AND FASTT
What is the best location for a tidal power plant?
Question 5 options:
A beach.
The ocean.
An inlet or bay.
how are acceleration and speed related
Answer:
Acceleration is the rate of change of velocity. Usually, acceleration means the speed is changing, but not always. When an object moves in a circular path at a constant speed, it is still accelerating, because the direction of its velocity is changing. Comment on robshowsides's post “Speed is the magnitude of velocity.
Explanation:
hope it helped tee hee
find two rational num between -3 and 2
Answer:
1 and -2
Explanation:
Basically rational numbers are numbers that can be expressed as a fraction and 1 can be expressed as 1/1 and -2 can be expressed as -2/1.
One of the world's fastest helicopters, the Westland Lynx, has a top speed of
4.00x 10^2 km/h. If its kinetic energy at this speed is 2.10 x 10^7J what is the helicopter’s mass?
The mass of the helicopter is 3402 kg.
What is kinetic energy?Kinetic energy is the energy possessed by a body as a result of its motion.
The kinetic energy of a body depends on its mass and velocity as shown below:
[tex]Kinetic\:energy = \frac{1}{2}mass*velocity[/tex]
[tex]mass = \frac{2KE}{{velocity}^{2} }[/tex]
velocity = 4.00x 10^2 km/h = 111.11 m/s
kinetic energy = 2.10 x 10^7J
[tex]mass = \frac{2 \times 2.1 \times {10}^{7} }{{111.11}^{2}} = 3402 \: kg[/tex]
Therefore, the mass of the helicopter is 3402 kg.
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it took 500 newtons of force to push a car 4meters how much work was done?
Answer:
The answer is 2000 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 500 × 4
We have the final answer as
2000 JHope this helps you