Answer:
The best option is for the following option m = 15 [g] and V = 5 [cm³]
Explanation:
We have that the density of a body is defined as the ratio of mass to volume.
[tex]Ro =m/V[/tex]
where:
Ro = density = 3 [g/cm³]
Now we must determine the densities with each of the given values.
For m = 7 [g] and V = 2.3 [cm³]
[tex]Ro=7/2.3\\Ro=3.04 [g/cm^{3} ][/tex]
For m = 10 [g] and V = 7 [cm³]
[tex]Ro=10/7\\Ro=1.42[g/cm^{3} ]\\[/tex]
For m = 15 [g] and V = 5 [cm³]
[tex]Ro=15/5\\Ro=3[g/cm^{3} ]\\[/tex]
For m = 21 [g] and V = 8 [cm³]
[tex]Ro=21/8\\Ro=2.625[g/cm^{3} ]\\[/tex]
A 125kg man buy a 6kg watermelon, a 3kg cantaloupe, and 6kgs of potatoes, he walks home with his purchases in a large bag. His walking speed is 2.5m/s2 , what force is required for him to get home?
Answer:
350N
Explanation:
Given parameters:
Mass of the man = 125kg
Mass of the watermelon = 6kg
Mass of cantaloupe = 3kg
Mass of potatoes = 6kg
Acceleration = 2.5m/s²
Unknown:
Force required to get home = ?
Solution:
To find this force we use;
Force = mass x acceleration
mass = 125 + 6 + 3 + 6 = 140kg
So;
Net force = 140 x 2.5 = 350N
According to the law of conservation of energy, how are potential energy and kinetic energy related?
A. In a closed system, the potential energy at the bottom is equal to the kinetic energy at the top.
B. The potential energy of a closed system will always be more than the kinetic energy.
C. In a closed system, the kinetic energy is twice the amount of the potential energy.
D. There is no relationship between kinetic energy and potential energy.
please help me solve
Answer:
I think D
Explanation:
The object the gives up electrons becomes ____ charged
Answer:
Negitive
Explanation:
Electrons have a negitive charge, protons have a positive charge, and neutrons have no charge.
Eric has a degree in business management is willing to move to another area for the right job. What is one benefit for Eric to gain by posting his resume to a career networking site?
Answer:
One benefit I listed: a higher salary
Explanation:
He expands his career possibilities which can lead to a higher salary, better or more preferable hours, more vacation time, and numerous other potential outcomes.
A net force of 40 N south acts on an object with a mass of 20 kg. What is the
object's acceleration?
(Hint: Use the formula a = f/m
A. a = 4 m/s 2 north
B. a = 2 m/s2 south
C. a = 10 m/s2 south
D. a = 20 m/s 2 north
Answer:
B. 2m/s² south
Explanation:
Given parameters:
Net force = 40N
Mass = 20kg
Unknown:
Acceleration of the object = ?
Solution:
To solve this problem, we use;
F = ma
F is the net force
m is the mass
a is the acceleration
a = [tex]\frac{f}{m}[/tex]
a = [tex]\frac{40}{20}[/tex] = 2m/s²
The acceleration of the object is 2m/s² south
A beam of light has a wavelength of 506 nanometers. What is the frequency of the light? What color is the light
Answer:
Beam Light wavelength = 506 nanometer Frequency of light = F The color of light = L To fine the electromagnetic field: => S = wavelength x Frequency Frequency = (3 x 10^8) / (5.06 x 10^ -7) F = 5.96 x 10^14 Hz According to the visible light spectrum, wavelength from 495 to 570 is equals to the color of green. Since the given wavelength is 506, thus, the color of light is green.
Explanation:
mark brain
A freight train traveling with a velocity of −4.0 m/s begins backing into a train yard. If the train's average acceleration is −0.27 m/s^2 , what is the train's velocity after 17 s?
Answer:
−8.59 m/s.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (u) = −4.0 m/s
Acceleration (a) = −0.27 m/s²
Time (t) = 17 s
Final velocity (v) =?
Acceleration is defined as the change of velocity with time. Mathematically, it is expressed as:
Acceleration = change of velocity / time
Acceleration = (final velocity – Initial velocity) / time
a = (v – u) / t
With the above formula, we can determine the velocity of the train after 17 s. This can be obtained as follow:
Initial velocity (u) = −4.0 m/s
Acceleration (a) = −0.27 m/s²
Time (t) = 17 s
Final velocity (v) =?
a = (v – u) / t
−0.27 = (v – –4 ) / 17
−0.27 = (v + 4 ) / 17
Cross multiply
−0.27 × 17 = v + 4
−4.59 = v + 4
Collect like terms
−4.59 – 4 = v
−8.59 = v
v = −8.59 m/s
Thus, the velocity of the train after 17 s is −8.59 m/s.
kg. m
A baseball player hits a baseball, changing its momentum by 15
7,100 N
The net force on the ball is
S
How long does the bat maintain contact with the ball?
Answer: 0.00211
Explanation:
A toy car is moving along with 0.40 joules of kinetic energy. If its mass doubles, the new kinetic energy will be
Answer:
that is the awnser key if that is your work sheet
Explanation:
i hope it is right
The simple activities like walking, jumping, throwing, etc. involves kinetic energy. The kinetic energy of an asteroid falling towards earth is very large. The new kinetic energy when the mass doubles is 0.8 J.
What is kinetic energy?The measure of the work an object can do by virtue of its motion is defined as the kinetic energy. When an object moves with a new constant speed after we perform a work, the energy which is transferred is the kinetic energy.
The kinetic energy is a scalar quantity and it depends on the mass and velocity of the object. Its SI unit is Joule.
The equation of kinetic energy is:
Kinetic energy = 1/2 m × v²
When m = 2m, then kinetic energy is:
Kinetic energy = 1/2 × 2m × v²
So when we double mass, Kinetic energy also doubles.
K.E = 0.8 J
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Hey can anyone pls answer dis rq!
Which of these objects illustrated can exert a force across a distance
A) Soccer ball
B) Hammer
C) Magnet
D) Weights
Answer:Magnet
Explanation:
Answer:
Magnet
Explanation:
Why would you be surprised if hockey puck started moving without being hit? Why would you be surprised if a fast moving
puck suddenly stopped in the middle of the ice without being touched?
Please use scientific explanations.
Answer:
id be scared because this thing is moving by its self at an alarming rate
Explanation:
Calculate the mass of an aeroplane travelling at 75 m/s with a kinetic energy of 843700J
Answer:
299.98kg to 2 d.p
Explanation:
Where:
843700= 1/2 m (75)^2
It's 5 kilometers from my house to the gym. If I walk to the gym and back home how many meters have I traveled
Answer:
10 km
Explanation:
Distance is a measurement of the length of space between two points or objects. Distance is a scalar quantity, that is it has magnitude and no direction. The S.I unit of distance is meter, but other units are inches, kilometers, mile and so on.
Total distance traveled = distance from house to gym + distance from gym back to the house
Total distance traveled = 5 km + 5 km
Total distance traveled = 10 km
2.An athlete whirls a 5.00 kg hammer attached to a 1.30 m long chain in a horizontal circle. The hammer makes a revolution in 1.00 s.
a. What is the velocity of the hammer?
Given:
m=
r= T= Unknown:
v=?
Equation:
v=2*pi*r/T
Answer:
you have the ans bro
v=2*pi*r/T
plug in the value s
An object moves with a constant speed of 30m/s on a circular track of radius 150m, What is the acceleration of the object? A) 0m/s2 b) 0.17m/s2 c) 5.0 m/s2 d) 6.0 m/s2
Answer:
C
Explanation:
read the question and they mean to mutilpy toea 30 m and subterc
If you lift a 3.2kg punkin to a height of 0.80 m, how much work do you do to lift the pumpkin?
Answer:
W=25.088J
Explanation:
W=Fx
W=mgx
W=3.2kg*9.8m/s^2*0.8m
W=25.088J
The distance from Earth to the Moon is 2.389 x 10^5 mi. Convert this distance to standard form.
Answer:
convert it into distance form
Explanation:
Based on the data in the table, what will happen when a sound wave travels from copper into lead?
When a sound wave travels from copper into the lead, it will slow down. The correct option is A.
A sound wave is a type of mechanical wave that is created by vibrations and travels through a medium such as air or water. It is characterized by its frequency, wavelength, amplitude, and speed. Sound waves are responsible for the sensation of hearing in humans and other animals.
When a sound wave travels from one medium to another, the speed and direction of the wave may change, depending on the properties of the two media. The change in speed is determined by the density and elasticity of the two media.
In the given table, we can see that the speed of sound is higher in copper (5,010 m/s) than in lead (1,960 m/s).
The wave changing in frequency or getting completely absorbed are not accurate predictions for what will happen when a sound wave travels from copper into the lead because the frequency of a sound wave is determined by the source of the wave, and is not affected by the medium through which it travels. Additionally, sound waves are generally not completely absorbed when they encounter a new medium, but rather they undergo reflection, transmission, or a combination of both.
The wave speeding up is also not a correct prediction because lead has a lower speed of sound than copper. When a sound wave travels from a medium with a higher speed of sound to a medium with a lower speed of sound, the wave will slow down.
Therefore, The answer is A. The wave will slow down.
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Answer:A the wave will slow down
Explanation:
please help me!!!!!! :)
Answer:
The president is permitted to veto specific legislative acts, but Congress has ... and judicial appointments and on the approval for ratification of treaties. ... State shall have the Qualifications requisite for Electors of the most numerous Branch of the State Legislature. ... No Bill of Attainder or ex post facto Law shall be passed.
Explanation:
find velocity when the kinetic energy is 144 j and mass is 4.5 kg
Answer:
26lkkkkkkkkkkkkkkkkkkkkkkkkkko
Explanation:
[tex] \underline{ \underline{ \text{Given}}} : [/tex]
Kinetic energy ( K.E ) = 144 JMass ( m ) = 4.5 kg[tex] \underline{ \underline{ \text{To \: find}}} : [/tex]
Velocity ( v )[tex] \underline{ \underline {\text{Solution}}} : [/tex]
[tex] \boxed{ \sf{Kinetic \: energy \: ( \: K.E) = \frac{1}{2} \: m {v}^{2} }}[/tex]
⤑ [tex] \tt{144 = \frac{1}{2} \times 4.5 \times {v}^{2} }[/tex]
⤑ [tex] \tt{144 = \frac{4.5 \: {v}^{2} }{2}} [/tex]
⤑ [tex] \tt{4.5 \: {v}^{2} = 144 \times 2}[/tex]
⤑ [tex] \tt{4.5 \: {v}^{2} = 288}[/tex]
⤑ [tex] \tt{ {v}^{2} = \frac{288}{4.5}} [/tex]
⤑ [tex] \tt{ {v}^{2} = 64}[/tex]
⤑ [tex] \tt{v = \sqrt{64}} [/tex]
⤑ [tex] \tt{v = \sqrt{( {8)}^{2} } }[/tex]
⤑ [tex] \tt{v = 8}[/tex] m s⁻¹
[tex] \boxed{ \boxed{ \underline{ \tt{ ⟿ Our \: final \: answer : \boxed{ \tt{ \: 8 \: m \: {s}^{ - 1} }}}}}} [/tex]
Hope I helped ! ♡
Have a wonderful day / night ! ツ
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What is the density of 100.0 grams of sodium?
1. A rock rolls off the edge of a cliff with an initial velocity of 10 m/s.
It takes 6.5 seconds for it to hit the ground below. What is the
displacement of the rock?
Answer:
65meters
Explanation:
Given data
velocity= 10m/s
time= 6.5seconds
Applying the expression
velocity= distance/time
substitute
10=distance/6.5
distance= 10*6.5
distance= 65meters
Hence the displacement is 65meters
help pls .. Which process produces the energy that powers a solar calculator?
Answer:
C) Nuclear fusion
Explanation: You had it correct
Answer:
Nuclear fusion
Explanation: Answer choice C
what happens to the horizontal component of velocity while an object is in the air.
Answer:
nothing happens
Explanation:
Horizontal component of velocity does not change (when air resistance is negligible); Vertical component of velocity changes due to GRAVITY. ... It takes the same exact amount of time and it has the same velocity but negative due to gravity.
have you ever wondered how clouds make shapes?
Answer:
Yes because
Explanation:
Clouds get their shapes from the air that surrounds them. ... Since clouds are made up of millions of tiny pieces of water, when they are really high up in the sky where the air is very cold, the water droplets freeze into floating ice crystals. When we observe these clouds way up in the sky, they look like wispy strands
Our eyes perceive colors because of differences in which of the following properties of light?
a)
Wavelength
b)
Intensity
c)
Source
d)
Angle
The properties of light is option a wavelength.
Wavelength:It is the distance between the points of two consecutive waves. It is usually denoted by the Greek letter lambda (λ), and it is equal to the speed (v) of a wave train in a medium divided by its frequency (f): λ = v/f.
So based on the above information, the a option is correct.
Learn more about the light here: https://brainly.com/question/18136864
How is fat diet different from a low calorie diet
An astranaut floating alone in outer space throws a basball if the ball moves at 20 m/s
the astranout will......
Answer:
20 m/s = 44 mph
He will get moved more to earth or away
Explanation:
Answer:
They will get pulled to the earth or moved away
Explanation: