Answer:
W=25.088J
Explanation:
W=Fx
W=mgx
W=3.2kg*9.8m/s^2*0.8m
W=25.088J
If the force of gravity acting on the box is 88 N, what is the normal force acting on the box?
Answer:
88N
Explanation:
If the force of gravity acting on the box is 88N, then the normal force on the box is also 88N;
The force of gravity is the vertical pull of gravity on a body.
The normal force is the force a surface impresses on an object to prevent it from passing through.The normal force is equal to the gravitational force pull on a body.
So the solution is 88N
In a velocity-time graph,
is represented by
the slope, or steepness, of the graph line.
Answer:
What is the question? Yes thats true but what do you need help with?
Explanation:
Answer:
Acceleration
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:
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.
How is fat diet different from a low calorie diet
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.
Hey can anyone pls answer dis rq!
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.
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:
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.
Which of the following has the greatest inertia ?
A) A 2000 kg car traveling along a highway at 20 m/s.
B) A 2200 kg car parked in a garage
C) A bullet of a mass of 30 grams flying at 300 m/s
D) A 2000 kg helicopter flying at 60 m/s
Answer:
b
Explanation:
A box is pushed with a force of 15 N through a displacement of 6 m. What is the work done on the box?
Answer:
90J
Explanation:
as known that W=f×s
therefore 15×6
=90j
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:
imma be a positive queen bc i feel like ppl now a days need positive thoughts in they head bc of all that is going on
Answer:
Calculating the question of whether or not to take it serious
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
What is the density of 100.0 grams of sodium?
help pls .. Which equation states Newton's second law?
Answer:
Choice C
m = F/a
Explanation:
[Force] F = [mass × acceleration] ma
× A) m = a/F → F ≠ a/m
× B) m = Fa → F ≠ m/a
✓ C) m = F/a → F = ma
× D) m = Fa/2 → F ≠ 2m/a
Answer:
ithink ....... sorry if it wrong
d
True or False. Light is a form of energy.
true or false
ASAP 10 POINTS
IF WRONG I WILL REPORT
trueee...................
Answer:
true
Explanation:
light is a form of energy which is radiation so true:)
Select the correct answer. The tallest players on a volleyball team USUALLY play which position? OA Middle Blocker/Hitter OB. Setter Oc. Outside Hitter OD. Libero
HELP DUE 10 MINUTES! MARK AS Bralinst
Answer:
middle blocker
Explanation:
Answer:
B / 2 ) Middle blocker / hitter
Explanation:
took the test
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.
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
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 ! ♡
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What’s the main idea of this paragraph in one sentence?
Answer:
All forces are either balanced or unbalanced and each force acts in different ways.
A block attached to a spring with an unknown spring constant oscillates with a period of 2.0 s. What is the period if
Answer:
a) If the mass is doubled, then the period is increased by [tex]\sqrt{2}[/tex]. Hence, the period of the system is 2.828 seconds.
b) If the mass is halved, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
c) The period of the system does not depend on amplitude. Hence, the period of the system is 2 seconds.
d) If the spring constant is doubled, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
Explanation:
The statement is incomplete. We proceed to present the complete statement: A block attached to a spring with unknown spring constant oscillates with a period of 2.00 s. What is the period if a. The mass is doubled? b. The mass is halved? c. The amplitude is doubled? d. The spring constant is doubled?
We have a block-spring system, whose angular frequency ([tex]\omega[/tex]) is defined by the following formula:
[tex]\omega = \sqrt{\frac{k}{m} }[/tex] (1)
Where:
[tex]k[/tex] - Spring constant, measured in newtons per meter.
[tex]m[/tex] - Mass, measured in kilograms.
And the period ([tex]T[/tex]), measured in seconds, is determined by the following expression:
[tex]T = \frac{2\pi}{\omega}[/tex] (2)
By applying (1) in (2), we get the following formula:
[tex]T = 2\pi\cdot \sqrt{\frac{m}{k} }[/tex]
a) If the mass is doubled, then the period is increased by [tex]\sqrt{2}[/tex]. Hence, the period of the system is 2.828 seconds.
b) If the mass is halved, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
c) The period of the system does not depend on amplitude. Hence, the period of the system is 2 seconds.
d) If the spring constant is doubled, then the period is reduced by [tex]\frac{\sqrt{2}}{2}[/tex]. Hence, the period of the system is 1.414 seconds.
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:
URGENT: If there is a 2 kg ball and a 5 kg ball with the same kinetic
energy, which one will be moving faster?
a. the 5 kg ball
b. the 2 kg ball
C. They will move with the same speed
d. None of the above. Explain.
Answer:
there is less mass to move so the 2kg ball will move faster. the kinetic energy of the 5kg ball will move slower due to the fact that it needs more energy to move if it has more mass.
Answer:
the 2kg ball
Explanation:
there is less mass to move so the 2kg ball will move faster. the kinetic energy of the 5kg ball will move slower due to the fact that it needs more energy to move if it has more mass.
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
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:
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 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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