Answer:
721 kg/m^3
Explanation:
Trust me bro
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.
A 2 cm object is 10 cm from a convex lens that has a focal length of 4.4 cm. The image is 8 cm from the lens.
The height of the image, to the tenths place, is
cm.
Answer:
-1.6
Explanation:
e2021
The Height of an Image for a Convex Mirror is calculated by using magnification equation
m = h(i) / h(o) = − d(i) / d(o) ,where
the magnification index of the mirror, m
the height of the object, h(o)
the height of the image, h(i)
the distance between the object and the mirror, d(o)
the distance between the image and the mirror, d(i)
h(i)/ 2 = -8 / 10
h(i) = -1.6 cm.
What is convex mirror ?"Convex Mirror is a curved mirror where the reflective surface bulges out towards the light source. This bulging out surface reflect light outwards and are not used to focus light."
What is magnification equation ?"The formula for magnification is m=h(i)/h(o)=-d(i)/d(o). m is the total magnification; h(i) is the height of the image; h(o) is the height of an object; d(i) is the distance from the lens to the in focus projected image; d(o) is the distance of the object to the lens. The negative sign represents that the image is inverted."
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What does an element's group number tell you about an element's chemical and physical properties ?
A tornado moving cross a street with a force of 600 N pushes a trailer a distance of 25 m.
How much work was performed in the process?
Answer:
W = 15,000 Joule
Explanation:
Mechanical Work
Mechanical work is the amount of energy transferred by a force. It's a scalar quantity, with SI units of joules.
If both the force and displacement are parallel, then we can use the scalar formula:
W=F.s
Where
F =Magnitude of the force
s = magnitude of the displacement
The tornado moved a trailer with a force of F=600 N for a distance of s=25 m. The work done was:
W = 600 N * 25 m
W = 15,000 Joule
PLEASE HELP BRANILIEST
The earliest goalie masks used were made from______________________.
Group of answer choices
Stone
Candy
Fiberglass
Wood
Answer:
The earliest goalie masks used were made from Fiberglass.
Explanation:
Hope that helps
Have a good day
If I double the amount I stretch a spring, what happens to its EPE
A. Doubles
B. Halves
C. Quadruples
D. Quarters
Compare and contrast the particle motion in each state of matter
Answer:
Gases, liquids and solids are all made up of microscopic particles, but the behaviors of these particles differ in the three phases. ... gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Hope this is fine for youWhich below, are the smallest basic units of matter?
molecules
ozone
atoms
vitamin E
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.
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
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
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:)
#CarryOnLearning
Answer: Amplifier
Explanation: Edge 2021
Have a great day :D
A vacuum cleaner has a rating of 460 W on 230 V mains. The value of the fuse connected in the plug will be
Answer:
2 amps
Explanation:
Given data
Power = 460W
voltage= 230V
Required
The amperage/ current of the fuse
Recall P= IV
I= P/V
I= 460/230
I=2 amps
Hence the current of the fuse is 2 amps
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
Which is a disadvantage of storing data digitally?
A.The parts of devices that store data are unstable compared to analog storage.
B. Other people can access personal data when a virus is copied with the data.
C. Noise makes digital data unreliable when copied.
D. The quality of copies stays the same as more copies are made.
Answer: its B I jus took it
Explanation:
What should be the initial potential energy of a pile driver ram so that when it strikes piles, it delivers a kinetic energy of 20 KJ?
Answer:
the initial potential energy should be 20 kJ.
Explanation:
Based on law of conservation of energy, the kinetic energy delivered by the pile driver when it strikes the piles, should be equal to the initial potential energy.
Since the final kinetic delivered is given as 20 kJ, then the initial potential energy should be 20 kJ.
Therefore, the initial potential energy should be 20 kJ.
I WILL GIVE BRAINLIEST
How could you explain that two objects of the same volume have different buoyancy in water???
HELP ITS URGENT
Answer:
Explanation:
Take for example you place two eggs in the water. One starts to sink and one remains floating. They have the same volume but the one that sinks is cracked just a little, which as soon as it hits the water, water starts to go in the egg. Then that changes the volume of the egg. (I've done this expirement before) It can also be the way you place the object in the water, or one object has been in the water longer. The buoyancy can be the way they are positioned/placed in the water. One may be more absorbant to the water as well.
I hope you understand what I am trying to say.
How Does Exercise Treat Depression?
Answer:
It can help take your mind off of it. and help you get outside and in the world.
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.
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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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If an object travels 230 km in 4 hours, what was the speed of the object? (speed = distance/time)
Answer:
Can you explain this?
Explanation:
Can you explain this?
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.
A 1kg skateboard sits at the top of a ramp 20 fr off the ground . How much potential energy does it have ?
Answer:
196J
Explanation:
Given parameters:
Mass of skateboard = 1kg
Height off the ground = 20m
Unknown:
Potential energy = ?
Solution:
The potential energy is the energy due to the position of a body above the ground.
It is mathematically expressed as:
Potential energy = mass x acceleration due gravity x height
Potential energy = 1 x 9.8 x 20 = 196J
why might you avoid opening a hot can of soda
Answer:
because im on a diet
Explanation:
Answer:
because.
Explanation:
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 local community has land for a park located along a river. The bank is starting to erode. Citizens want to use ideas based on science to solve the erosion problem. Which idea would best help this community protect the riverbank from eroding?
A. Adding more soil to the bank will protect existing land from eroding away.
B. Watering the bank daily will make existing soil heavier so it will not erode.
C. Building a rock wall along the bank will keep soil in place so water cannot erode it away.
D. Allowing individuals to walk near the edge of the bank will compact the soll so it will not erode,
if there is something other then the answer just comment it.
Answer:
C.
Explanation:
This is to support from being eroded a foundation to that will separate the water from the soil and to avoid it from being eroded.
Wich pair of factors affects the force of gravity between objects.
Answer:
Explanation:
Mass of the two objects effects gravity and so does the distance between them squared
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.
The state of matter with particles that are not attracted or tightly packed
and are not arranged in a regular pattern; zoom around to easily change
shape and volume *
a.gas
b.liquid
c.solid
It's none of the above hope this helps