Using technology is a great way to help motivate you and keep track of distances and times while fitness walking.
1. True
2. False
Question 10 of 20 :
Select the best answer for the question.
10. Jamie is wiring a new outlet through a basement. She's run cabl
the wires to the new receptacle. What must she do next behore she pr
A. Mount the receptacles in the boxes.
B. Test the new circuit branch.
C. Turn on the current to test voltage.
D. Perform a continuity test to test for breaks in the conductor.
Mark for review (Will be highlighted on the review page)
Answer:
B. Test the new circuit branch.
Explanation:
I'm not sure and this is probably wrong, so please feel free to correct me.
what are beats?
A: periodic fluctuations int he velocity of sound waves
B: periodic fluctuations in the wavelength of sound waves
C: periodic fluctuations in the intensity of sound waves
D:periodic fluctuations in the frequency of sound waves
1. How much thermal energy does a 2kg steel block
(c=450J/kg°C) lose when it cools from 300°C to 20°C?
please help me and show the working out.
Suppose a 4.0-kg projectile is launched vertically with a speed of 8.0 m/s. What is the maximum height the projectile reaches?
A. 1.7 m
B. 3.3 m
C. 6.5 m
D. 13 m
help as quick as possible plz :(
Answer:
h = 3.3 m (Look at the explanation below, please)
Explanation:
This question has to do with kinetic and potential energy. At the beginning (time of launch), there is no potential energy- we assume it starts from the ground. There, is, however, kinetic energy
Kinetic energy = [tex]\frac{1}{2}[/tex]m[tex]v^{2}[/tex]
Plug in the numbers = [tex]\frac{1}{2}[/tex](4.0)([tex]8^{2}[/tex])
Solve = 2(64) = 128 J
Now, since we know that the mechanical energy of a system always remains constant in the absence of outside forces (there is no outside force here), we can deduce that the kinetic energy at the bottom is equal to the potential energy at the top. Look at the diagram I have attached.
Potential energy = mgh = (4.0)(9.8)(h) = 39.2(h)
Kinetic energy = Potential Energy
128 J = 39.2h
h = 3.26 m
h= 3.3 m (because of significant figures)
Compare two processes we use to measure the age of Earth and its parts.
.
not radioactive dating my teacher said it was wrong :(
Answer:
Generally speaking, scientists have developed four different methods of determining the age of the earth. By using these methods, or a combination of them, the age of geological formations created by past events and even the fossilized bones of prehistoric animals can be determined.
Based on the research done by scientists, the Geologic Column, a graph that illustrates earth age, was developed. The Column, with its names for the epochs and eras of time, illustrates what scientists think was taking place in earth history. A small version of the Geologic Column is pictured at the right.
Explanation:
I hope this helps :)
Read the experiment setup. Then, match the components of the experiment with the type of variable.
Marcy is doing an export lent on the effect of fertilizer on plant growth. She grows 30 pots of radishes. 10 pots receive fertilizer A, 10 pots receive fertilizer B, and 10 pots receive no fertilizer. She grows all the pots in the same location and gives them the same amount of water
a. ___: fertilizer
b. ___: plant growth
c. ___: growing in same location, water, type of plant (radish)
1. Independent variable
2. Dependent variable
3. Controlled variable
Describe the shape of a field created by a bar magnet
Answer:
its circular
Explanation:
Which are most likely to be used during a routine visit to the dentist?
CO
radiopharmaceuticals and X-rays
ultrasound and X-rays
lasers and tracers
ultrasound and radiopharmaceuticals
Answer:
The most likely items to be used are;
Ultrasound and X-rays
Explanation:
A routine visit to a dentist consists of two areas of activities, including;
a) Dental examination and check up
b) Oral prophylaxis, and dental cleaning
The dental examination may involve the use of X-rays, which allow the detection of cavities between the teeth
The dental cleaning can be carried out with the use of an ultrasound cleaner, which allow the cleaning of sensitive teeth without hurting the patient
Therefore, the items most likely to be used during a routine dental visit are ultrasound and X-rays
Answer:
ultrasound and x-rays
Explanation:
Why do you think spacecraft that carry instruments to collect data about objects in space are called probes?
Answer:
my mind cant comprehend a shing word u just said
Explanation:
The probes collect data, they capture the movement in space, therefore, spacecraft that carry instruments to collect data about objects in space are called probes, So the given statement is correct.
What are Probes?
Any conductor that is placed into a plasma and gathers current is a probe. Measurements of the current on the probe as a function of the bias potential given to the probe can be used to identify a plasma's properties.
Such probes affect their surroundings while directly detecting electron and ion flows in the plasma. Any conductive material (wire, foil, chamber walls, etc.) can serve as a plasma probe; nevertheless, precise control over the probe's size, shape, and substance is necessary to achieve detectable plasma levels. Astronauts are not present aboard probes. Scientists can analyze the data the probes relay back to Earth. Sputnik 1 was the first spacecraft to launch.
Because probes probably collect data, they capture the movement in space, therefore, spacecraft that carry instruments to collect data about objects in space are called probes.
To know more about probes:
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Need help ASAP
Thanks+ BRAINLIST only for correct answers
4. Which of the following sets of EM radiation can harm your body cells?
a. Gamma ray, microwaves, infrared
b. Light, ultraviolet, x-ray
c. Microwaves, ultraviolet, infrared
d. Ultraviolet, x-ray, gamma ray
Answer:
a. Gamma ray, microwaves, infrared
A basketball weighing 0.63 kg is dropped from a height of 6.0 meters onto a court. Use the conservation of energy equation to determine the velocity of the ball at a height of 2.0 meters above the court.
Answer:
The velocity of the ball at a height of 2.0 meters above the court is approximately 8.85 m/s
Explanation:
The given parameters of the ball are;
The mass of the ball, m = 0.63 kg
The height from which the ball is dropped, h₁ = 6.0 meters
The height at which the velocity of the ball is sought, h₂ = 2 meters
The initial potential energy of the ball, P.E. = m·g·h₁ = 0.63 × 9.8 × 6.0 = 37.044
The initial potential energy of the ball, P.E.₁ = 37.044 J
The potential energy of the ball, when the ball is at 2 meters above the court, P.E.₂ = m·g·h₂ = 0.63 × 9.8 × 2.0 = 12.348
The potential energy of the ball, when the ball is at 2 meters above the court, P.E.₂ = 12.348 J
From M.E> = P.E. + K.E.
Where;
M.E = The total mechanical energy of the ball = Constant
P.E. = The potential energy of the ball
K.E. = The kinetic energy of the ball
By the conservation of energy principle, we have;
The potential energy lost by the ball = The kinetic energy gained by the ball
The potential energy lost by the ball = P.E.₁ - P.E.₂ = 37.044 - 12.348 = 24.696
The potential energy lost by the ball = 24.696 J
The kinetic energy gained by the ball = 1/2·m·v² = 1/2×0.63×v²
Where;
v = The velocity of the ball
∴ The potential energy lost by the ball at 2.0 meters above the court = 24.696 J = The kinetic energy gained by the ball at 2.0 meters above the court = 1/2×0.63×v²
24.696 J = 1/2×0.63 kg ×v²
v² = 24.696 J / (1/2×0.63 kg) = 78.4 m²/s²
∴ v = √(78.4 m²/s²) = 8.85437744847 m/s
The velocity of the ball at a height of 2.0 meters above the court, v ≈ 8.85 m/s.
A ship is able to float on water because it's density is less than that of the water.
A. True
B.False
Answer:
A.True
A ship is able to float on water because It is less dense than the water.
Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects?
X-rays
radio waves
infrared light
visible light
Answer:
X rays is wrong on edg
Explanation:
Get It? Explain Using the equation for translational kinetic energy,
show why a car moving at 20 m/s has four times the translational
kinetic energy of the same car moving at 10 m/s.
Answer:
[tex]K_1=4K_2[/tex]
Explanation:
Kinetic energy is given by
[tex]K=\dfrac{1}{2}mv^2[/tex]
m = Mass of object
v = Velocity of object
Here mass is constant so
[tex]K\propto v^2[/tex]
[tex]v_1[/tex] = Intial velocity of the car = 20 m/s
[tex]v_2[/tex] = Final velocity of the car = 10 m/s
[tex]\\dfrac{K_1}{K_2}=\dfrac{v_1^2}{v_2^2}\\\Rightarrow \dfrac{K_1}{K_2}=\dfrac{20^2}{10^2}\\\Rightarrow \dfrac{K_1}{K_2}=4\\\Rightarrow K_1=4K_2[/tex]
So, a car moving at 20 m/s has four times the translational kinetic energy of the same car moving at 10 m/s.
I had to show a screenshot of this because brainly thinks it detects a bad word
which statements describe kinetic and potential energy? check all that apply.
Answer:
ACDE
Explanation:
Energy is generally described as the ability to do work by a body. There are two main forms of energy which are the kinetic energy and the potential energy.
Other energy forms stems from these two energy types.
Potential energy expressly deals with the position of a body. It is mathematically given as:Potential energy = mass x acceleration due to gravity x height
It is the energy stored based on the position of particles within a mediumThese description satisfies options A, C
Kinetic energy is the energy due to the motion of body. It is mathematically given as:Kinetic energy = [tex]\frac{1}{2}[/tex] x mass x velocity²
Also, kinetic energy is directly proportional to the velocity of a body.The description satisfies DE
3,000ml of an unknown liquid has a mass of 3 kg. What is its density?
Answer:
Ro = 1000 [kg/m³]
Explanation:
We must remember that density is defined as the relationship between mass and volume.
[tex]Ro=m/V\\[/tex]
where:
Ro = density [kg/m³]
m = mass = 3 [kg]
V = volume = 3000 [ml]
We must convert the volume of milliliters to cubic meters
[tex]3000[ml]*\frac{0.001Lt}{1ml}*\frac{1m^{3} }{1000Lt} = 0.003m^{3}[/tex]
Now replacing:
[tex]Ro=3/0.003\\Ro=1000[kg/m^{3} ][/tex]
What does the structure labeled A represent in the model of the human brain below?
Answer:D blood vessels
Explanation:
Answer:
D
Explanation:
just took the quiz
HELP PLS MARKING BRANLIST 100 Pts TAKING TEST RN
A shopping cart is going 2.0 m/s and comes to a complete stop after 4 seconds. What was the cart's acceleration?
8 m/s2
-0.5 m/s2
0.5 m/s2
-8 m/s2
Answer:
0.5 m/s2
Explanation:
accelration formula : final velocty - starting velocity divided by time
why might you avoid opening a hot can of soda
Answer:
because im on a diet
Explanation:
Answer:
because.
Explanation:
An electrical generator creates electricity by
A) By spinning a turbine with kinetic energy
B) By using Gasoline
C) By exposing a coil of wire to a changing magnetic field
D) By Aligning the magnetic domains of the coil of wire
If you are in a car and your sibling is driving in the same car next to you at the same speed, does your brother appear to be moving?
Answer:
yes, because you guy's are moving in a car. because if you think about it, your parents are driving, but the cars moving so basically you guys would be moving.
please mark as brainly
No your brother would appear to be stagnant ( i.e. Not moving )
Given that your brother is driving next to you at the same speed he would appear to be stagnant ( not moving ) to you.
When the basic factors of motion which are ;
Acceleration, Speed, Distance andTime of takeoffAre the same the objects operating at the same factor values would appear not to be moving to each other.
Therefore we can conclude that your brother would appear to be stagnant to you ( i.e. Not moving )
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What does an element's group number tell you about an element's chemical and physical properties ?
what is the difference between speed and velocity?
Explanation:
The reason is simple. Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement. Put another way, speed is a scalar value, while velocity is a vector.
name the universal force of attraction that exists between masses
Answer:
gravity
Explanation:
Answer: gravity
Explanation: Newton's revolutionary idea was that gravity is universal - ALL objects attract in proportion to the product of their masses. Gravity is universal.
Someone please help me! Please help
Answer:
Explanation:
thumbs down
thumbs up
thumbs up
thumbs down
thumbs up
what is inertia and how is it related to the newton's first law of motion?
Answer:
Inertia is the resistance of any physical object to any change in its velocity. This includes changes to the object's speed, or direction of motion. An aspect of this property is the tendency of objects to keep moving in a straight line at a constant speed, when no forces act upon them.
Explanation:
Some sort of a local field, maybe not our A field, is really the cause of inertia. When you push on an object a gravitational disturbance goes propagating off into either the past or the future. Out there in the past or future the disturbance makes the distant matter in the universe wiggle.
A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object.
Answer:
2.04m/s²
Explanation:
Complete Question
A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object. Find the acceleration of the object.
According to Newtons second law;
\sum F_x = ma_x
F_m - F_f = ma_x
Fm is the applied force
Ff is the frictional force
m is the mass
a is the acceleration
Substitute the given values
40N - nmg = 10a
40 - 0.2(10)(9.8) = 10a
40 - 19.6 = 10a
20.4 = 10a
a = 20.4/10
a = 2.04m/s²
Hence the acceleration of the object is 2.04m/s²
What is the cost of operating a 100 W light bulb for "4 hrs per day" for 30 days, if the cost of electricity is 6 cents kW•h
Answer:
the cost of operating the light bulb is 72 cents.
Explanation:
Given;
cost of electricity, C = 6 cents / kW.h
power of light bulb, P = 100 W
time of light power consumption, t = 4 hours per day for 30 days
total time = 4 hours x 30 = 120 hours
Power consumed by the light bulb is calculated as;
P = 100 x 120 = 12000 w.h = 12 kW.h
Cost of power consumption = 6 cents/kWh x 12 kWh
= 72 cents
Therefore, the cost of operating the light bulb is 72 cents.
The primary job of a(n) ____
is to increase the power of a modified radio wave.
The primary job of a(n) ____
is to increase the power of a modified radio wave.
Answer:
amplifierExplanation:
Hope it helps:)
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Answer: Amplifier
Explanation: Edge 2021
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