Answer:
The acceleration of the block is 1.21 m/s².
Explanation:
Given that,
Mass = 2.0 kg
Force = 25.0 n
Angle = 30°
Coefficient of friction = 0.752
We need to calculate the acceleration of the block
Using balance equation
[tex]F-(mg\sin\theta+\mu mg\cos\theta)=ma[/tex]
Put the value into the formula
[tex]25-(2.0\times9.8\sin30+0.752\times2.0\times9.8\cos30)=2.0a[/tex]
[tex]a=\dfrac{25-(2.0\times9.8\sin30+0.752\times2.0\times9.8\cos30)}{2.0}[/tex]
[tex]a=1.21\ m/s^{2}[/tex]
Hence, The acceleration of the block is 1.21 m/s².
Which waves can travel through a vacuum?
A) light waves
B) Ocen waves
C) Sound waves
D) mechanical waves
A binary star system that is detected from the drop in luminosity as one star passes in front of the other is called ___________.
A binary star system that is detected from the drop in luminosity as one star passes in front of the other is called eclipsing. It has two stars.
What is a binary system?A binary system is a system composed of two stars that exert gravitational forces on a group of celestial bodies.
In a binary system, planets and celestial bodies can exhibit well-defined or irregular (very unstable) orbits.
The eclipsing binaries are stars where binary planets orbit in a plane containing the same line of vision, thereby eclipsing each other.
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If a planet's average distance from the sun is 10 AU, what is its orbital period?
The period will be 11.18 years
your welcome
your girl unique
|| ▼ Answer ▼ ||
The orbital period is 31.62 years when the average distance from the sun is 10AU
|| ✪ Explanation✪ ||
Given:
The average distance of the planet from the sun is r = 10 AU
To find the orbital period.
According to Kepler's third law,
[tex]T^{2}[/tex] ∞ [tex]r^{3}[/tex]
[tex]T^{2} =kr^{3}[/tex]
[tex]T=\frac{3}{2}[/tex]
Here, the constant k is taken to be 1.
Substituting the values, the orbital speed will be
[tex]T=(10)\frac{3}{2}[/tex]
[tex]=31.62~years[/tex]
Final Answer: The orbital period is 31.62 years when the average distance from the sun is 10AU
Hope this helps!
If you have any queries please ask.
the unit of area is a derived unit . why?
sorry this is one side of the note
Air always moves from an area of high pressure to an area of ____________ pressure.
Answer:
low
Explanation:
This is because the energy in the air molecules in a high pressured area will constantly move and expand outwards. This is why gas leaks outside of labs, pipes, and soda bottles.
A force of 10 N is applied perpendicular to the end of a bar of
length 0.2 m. Calculate the torque produced by the force.
The torque produced by the force is 2 Nm
Torque
This is the turning effect of a force.
The torque of a force is given by τ = Fd where
F = force applied and d = perpendicular distance of force from action pointSince τ = Fd,
F = force applied = 10 N and d = length of bar = 0.2 mSubstituting the values of the variables into the equation, we have
τ = Fd
τ = 10 N × 0.2 m
τ = 2 Nm
So, the torque produced by the force is 2 Nm
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In an ionic compound, what happens to the electrons that the metal atoms have lost?
Answer:
metal atoms lose electrons to form positively charged ions. non-metal atoms gain electrons to form negatively charged ions
Explanation:
About my inequality stuff
Answer:
Sample of inequality suff:income gap,health care,and social class
Position vs Time
Which statements describe the motion of the object
represented by the graph? Select three options.
12
10
8
Position (m)
The object is moving away from the origin.
The object is moving towards the origin.
The object started at the origin.
The object started at 2 meters.
The object is traveling at a constant velocity.
on
6 4
.
N
2
0
1
4
ch
2. 3
Time (s)
5
Answer:
1. the object is moving away from the origin.
4. the object started at 2 meters.
5. the object is traveling at a constant velocity.
Explanation:
did it on edge
A 400 N force accelerates an object at 2 m/s2. What is the mass of the object?
( accidentally clicked ) , might not be the answer prolly could
Answer:
m = 200 [kg]
Explanation:
To solve this problem we must use Newton's second law, which states that the sum of forces must be equal to the product of mass by acceleration.
ΣF = m*a
where:
F = force = 400 [N]
m = mass [kg]
a = acceleration = 2 [m/s^2]
400 = m*2
m = 400/2
m = 200 [kg]
A basketball is made of matter. Fire itself is not matter. However, the wood that burns is matter. A basketball is very different from a fire. What are some differences that might make a basketball matter but not a fire?
Answer: A basketball is something that can have a physical or chemical change done to it.
Explanation:
A basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass
What is the matter?Anything which has mass and occupies space is known as matter, mainly there are four states of matter solid liquid gas, and plasma.
These different states of matter have different characteristics according to which they vary their volume and shape.
For any substance to be considered as matter it must have to contain some mass and occupies some space.
As given in the problem statement a basketball is made of matter. The fire itself is not a matter however, the wood that burns is matter. A basketball is very different from a fire because a basketball has some mass in it on the other hand fire does not contain any mass.
For any substance to be considered as matter it must have to contain some mass and occupies some space.
Thus, a basketball is considered a matter but fire is not considered a form of matter.
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Ben walks 500 meters from his house to the corner store. He then walks back toward his house but stops to talk to a
neighbor when he is 200 meters from the corner store. If it takes Ben 910 seconds from the time he leaves his house
until he stops to talk to his neighbor, what is his average velocity? (Round your answer to the nearest tenth of a meter
per second.)
Ben's average velocity is m/s.
Answer:
I'm terrible at explaining so here's a screenshot
- Ripper
Explanation:
If you had a known sample of a mineral whose density was 7.1 grams/ml and its volume was 15 ml. What is the mass of the mineral.
Answer:
The answer is 106.5 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume = 15 mL
density = 7.1 g/mL
We have
mass = 7.1 × 15
We have the final answer as
106.5 gHope this helps you
How does the law of conservation of energy relate to the system shown in this model
Answer: The law of conservation of energy is a physical law that states energy cannot be created or destroyed but may be changed from one form to another. Another way of stating this law of chemistry is to say the total energy of an isolated system.
Explanation:
Answer:
the sun gives off energy to the color panel
what is the answer to this?
Answer:
I think it is the forth one
Answer:
the last one. "of the thumbprint searing her immutable brow"
Explanation:
I hope it help you : )
Must a magnetic force be exerted on the charge carriers in a conducting loop in order for a current to be induced in the loop
It is true that a magnetic force must be exerted on the charge carriers in a conducting loop for the current to be induced in the loop.
What is Magnetic Force?Magnetic Force refer to force that attract or repel between electrically charged particles mainly because of their movement. This force is responsible for attraction of magnets.
The force on a conduction current loop in a uniform magnetic field is always zero. A current loop with magnetic moment pointing to the left magnitude decrease to the right.
Therefore, It is true that a magnetic force must be exerted on the charge carriers in a conducting loop for the current to be induced in the loop.
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please help me determine the distance between the two children
Answer:
10
Explanation:
a 50kg person is standing still in ice skates throws their 2.0kg helmet to the right at 25m/s while on a friction less surface. what is the final speed of the person
Answer:
Vp = 1 [m/s]
Explanation:
In order to solve this problem, we must use the principle of conservation of the amount of movement. In the same way, analyze the before and after of the actions.
The moment before
The 50kg person is still hold (no movement) with the 2kg helmet
The moment after
The helmet moves at 25[m/s] in one direction, the person moves in the opposite direction, due to the launch of the helmet.
In this way we can apply the principle of conservation of movement, expressing the before and after. To the left we have the before and to the right of the equal sign we have the after.
Σm*V1 = Σm*V
where:
m = total mass = (2 + 50) = 52[kg]
V1 = velocity before the lunch = 0
(50 + 2)*V1 = (25*2) - (Vp*50)
0 = 50 - 50*Vp
50 = 50*Vp
Vp = 1 [m/s]
Where is the lightning rod attached to protect the building from lightning?
(a) On the top of the building
(b) On the bottom of the building
(c) In the middle of the building
(d) All of these
Answer:
On the top of the building
Explanation:
This lightning rod is called earthing This protects the building from thunder .As it accepts the lightning first and sends it down the groundA sport car starts from rest with an acceleration of 12 m/s2 . Calculate its final velocity after 7 s.
Answer:
Final velocity= 84 m/s
Explanation:
V final= V initial + a * t
Vf = 0+ 12 (7)
Vf= 84 m/s
help me plz noww thx
1.2 m long spring with a spring force of 200.0 N/m, 12.0 kg mass is attached to it, find the length
of the spring after extension after the mass is attached.
(hint: F = -6X)
(1 Point)
A) 1.232 m
B) O 1.788 m
C) 02.112 m
D) 2.788 m
Answer: 1.232
Explanation:I remember having this as a hw and this was the answer correct me if I was wrong
From Hooke's law, the length of the spring after extension and after the mass is attached is 1.788 meters. Option B is the answer.
HOOKE'S LAWHooke's law state that in an elastic material, the force applied is directly proportional to the extension provided that the elastic limit is not exceeded.
Given that a 12.0 kg mass is attached to 1.2 m long spring with a spring constant of 200.0 N/m.
The given parameters are:
mass m = 12kgInitial length [tex]L_{1}[/tex] = 1.2 mSpring constant K = 200 N/mExtension e = ?According to Hooke's law
F = Ke
But F = mg
mg = Ke
Substitute all the parameters into the formula to get extension e
12 x 9.8 = 200e
e = 117.6 / 200
e = 0.588 m
The length of the spring after extension and after the mass is attached will be
[tex]L_{2}[/tex] = [tex]L_{1}[/tex] + e
[tex]L_{2}[/tex] = 1.2 + 0.588
[tex]L_{2}[/tex] = 1.788 m
Therefore, the correct answer is option B because the length of the spring after extension and after the mass is attached is 1.788 meters.
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Which of the following has potential but not kinetic energy?
A.) A roller coaster zooming down a hill
B.) A child riding their bike
C.)A bird flying from a tree
D.) A ball sitting on a shelf
Answer:
D.)Explanation:
Potential energy is when a object is not in motion and the ball is sitting on a shelf not being thrown around or rolling. kinetic energy is when a obeject is in motion and moving.
Saeed applied a force of 55 N to accelerate a 10 kg box at 3m/s2 along a horizontal surface. What is the magnitude of the frictional force?
1. 15N
2. 25N
3. 43N
4. 75N
5. 35N
the answer is 25N if u calculate it right the answer will be 25
The magnitude of the frictional force on the box is 25 N.
What is meant by frictional force ?Frictional force is defined as the opposing force that resists the relative motion between surfaces.
Here,
Mass of the box, m = 10 kg
Force applied on the box, F = 55 N
Acceleration of the box, a = 3 m/s²
The frictional force, f opposes the applied force, F. So that the applied force must over come the frictional force in order to accelerate the box.
So,
F - f = ma
Frictional force, f = F - ma
f = 55 - (10 x 3)
f = 55 - 30
f = 25 N
Hence,
The magnitude of the frictional force on the box is 25 N.
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How long will bus take to travel 150 km at an average speed of 40km/hr
Answer:
3.75 hours
Explanation:
By [tex]v = \frac{d}{t}[/tex]
where v is the velocity (or speed in this case)
d is the distance travelled
t is the time taken
[tex]t = \frac{150}{40}=3.75[/tex]
Therefore it takes 3.75 hours for the bus to travel 150 km and 40 km/hr.
All electromagnetic wave travel through a vacuum at
Answer
An electromagnetic wave transports its energy through a vacuum at a speed of 3.00 x 108 m/s (a speed value commonly represented by the symbol c).
Answer:
it travels through a vacuum at the speed of light
A florist has 144 roses and 312 lilies. He makes separate bunches of roses and lilies having equal number of flowers in each bunch. What is the greatest number of flowers the florist can have in each bunch
Which type of wave is a combination of two waves?
mechanical waves
longitudinal waves
surface waves
transverse waves
Answer:
Standing wave,Also called stationary wave,combination of two waves moving in opposite direction,each having the same amplitude and frequency.They phenomenon is the result of interference;that is when waves are superimposed,their energies are either added together or cancelled out.
Explanation:
hpe it hlps u<°>
The combination of two waves is "mechanical waves". The correct option is A.
What is a mechanical wave?A mechanical wave is a type of wave that requires a medium to travel through. In a mechanical wave, energy is transferred through the motion of particles in the medium, rather than the transfer of matter. Examples of mechanical waves include sound waves, water waves, and seismic waves.
In a mechanical wave, energy is initially added to a small region of the medium, which creates a disturbance that propagates outward as a wave. As the wave travels, particles in the medium oscillate back and forth around their equilibrium positions, transferring energy to neighboring particles. The wave continues to travel until it encounters a boundary, where it may be absorbed, transmitted, or reflected.
Mechanical waves can be classified as transverse waves or longitudinal waves, depending on the direction of particle motion relative to the direction of wave propagation. In a transverse wave, particle motion is perpendicular to the direction of wave propagation, while in a longitudinal wave, particle motion is parallel to the direction of wave propagation.
Mechanical waves are an important aspect of many natural phenomena and technological applications. They play a crucial role in fields such as acoustics, optics, and seismology, and have applications ranging from medical imaging to telecommunications.
Here in the Question,
A combination of two waves can be any type of wave, but it is most commonly a type of mechanical wave. Mechanical waves are waves that require a medium to travel through, such as sound waves or water waves.
The other three types of waves mentioned - longitudinal waves, surface waves, and transverse waves - are all specific types of mechanical waves.
Longitudinal waves are waves in which the particles of the medium vibrate back and forth parallel to the direction of wave propagation. Examples include sound waves and seismic waves.
Transverse waves are waves in which the particles of the medium vibrate perpendicular to the direction of wave propagation. Examples include light waves and electromagnetic waves.
Surface waves are waves that occur at the interface between two different media, such as the interface between air and water. Examples include ocean waves and seismic waves.
Therefore, the most appropriate answer to the question would be "mechanical waves".
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Is it possible to apply the laws of Newton's dynamic to the motorcycle of the moon and the earth?
Answer:
Yes, it is possible
Explanation:
If possible, since Newton's laws are based on the motion of bodies that have mass. An example of how a vehicle can be moved on the moon was seen during lunar exploration where American astronauts drove a buggy-cart on the moon for a period of time.
We must remember that Newton's Second Law tells us that force is equal to the product of mass by acceleration. In this way we have:
F = m*a
where:
F = force = [N]
m = mass [kg]
a = acceleration [m/s²]
The force is produced by internal combustion or by electric action of the vehicle engine, the mass is the mass of the vehicle plus that of the crew member and the acceleration is the one that develops due to the change of speed, from rest to a certain speed.
Which groups influence the creation of public policy? Check all that apply.
military branches
individual citizens
interest groups
legislators
political parties
foreign diplomats
media organizations
Legislators,political parties ,foreign diplomats are the groups influence the creation of public policy.
What is public policy?Public policy is an institutionalized plan to solve relevant and real-world problems.
It is driven by a conception and executed via programs as a course of action devised and/or adopted in response to societal challenges, often by a government or non-profit organization.
Legislators,political parties ,foreign diplomats are the groups of influence the creation of public policy.
Hence, option D,E,F are correct.
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B. individual citizens
C. individual citizens
E. political parties
G. media organizations