The acceleration is -0.4 m/s² if the car is driving at 33 m/s and slows down to 29 m/s over a period of 10 seconds.
What is acceleration?It is defined as the rate of change in linear velocity with respect to time. It is also known as linear acceleration.
As we know,
The acceleration can be found using the formula:
a = Δv/t
Here a is the acceleration
Δv is the change in linear velocity
t is the time
Δv = 29 - 33
Δv = -4 m/s
t = 10 seconds
a = -4/10
a = -0.4 m/s²
Thus, the acceleration is -0.4 m/s² if the car is driving at 33 m/s and slows down to 29 m/s over a period of 10 seconds.
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A tuning fork is known to vibrate with frequency 262Hz. When it is sounded along with a mandolin string, four beats are heard every second. Next, a bit of tape is put onto each tine of the tuning fork, and the tuning fork now produces five beats per second with the same mandolin string. What is the frequency of the string? (a) 258Hz (b) 258Hz (c) 262Hz (d) 266 Hz (e) 267 Hz
The supplied tuning fork has a frequency of 262Hz.
A recurring event's frequency is measured by how many times it occurs in a unit of time. To emphasize distinctions with spatial and angular frequencies, respectively, it is also sometimes referred to as ordinary frequency or temporal frequency.
Additionally, it is claimed that when it is played on a mandolin, four beats can be heard every second.
Together, the beats produced by a vibrating mandolin string and tuning fork are referred to as beat frequencies.
Frequency of beat= Frequency of tuning fork + Frequency of mandolin string
Given that a tuning fork's frequency is 262 Hz
String frequency equals 4 beats per second (4Hz).
Therefore, Frequency of beat = 262Hz +4 Hz = 266Hz
Hence, the correct answer for the given question is option (D) 266Hz
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A barbel weighing 215N is raised to a height of 2.0 M above the ground. It is then dropped from that height.
A. What is the kinetic energy of the barbell as it hits the floor?
B. What is the velocity of the barbell as it hits the floor?
Answer:
430 J6.26 m/sExplanation:
A. The kinetic energy is the same as the initial potential energy:
PE = mgh = (215 N)(2.0 M) = 430 J
__
B. The velocity achieved by falling from a height h is given by ...
v = √(2gh)
v = √(2·9.8 m/s^2·2 m) = √(39.2 m^2/s^2)
v ≈ 6.26 m/s
A hollow copper tube carries a current along its length. Why is B=0 inside the tube? Is B nonzero outside the tubes
Yes, because B=0 inside the tube so, B is non-zero outside the tubes.
Explain cylindrical symmetry?A surface or solid of revolution exhibits circular symmetry around an axis in three dimensions. This property is also known as cylindrical symmetry or axial symmetry.
Apply Ampere's law to the circle in the image with the number 1 on it. The magnetic field inside the tube must be zero because the current has a cylindrical symmetry about its central axis, which causes the line integral to reduce to the magnetic field's strength times the path's circumference.
However, this is equal to zero because there is no current flowing along this path. On the other hand, if the conductor's current is the current flowing through channel 2, the line integral will not equal zero, indicating that there is a magnetic field outside the tube.
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What is the impact of age on flexibility? A. Younger people tend to develop flexibility more slowly. B. Younger people tend to be more flexible. C. Older people tend to be more flexible. D. Older people cannot maintain their flexibility.
Answer:
the answer is b
Explanation:
Which do you prefer to be healthy first? People, community or enviroment? Support you answer.
The environment because maintaining a healthy environment is central to increasing quality of life and years of healthy life.
Explanation:
A student jumps off of a cliff into a river 25.9 m below. If the student landed 20.7 m horizontally away from where they jumped how much time was the student airborne?
a pitcher throws a .015 kg baseball from rest to a final velocity of 45. what is the magnitude of the change in momentum of the baseball
Answer:
0.675 kg m/s
Explanation:
Momentum = mass x velocity
= 0.015 x 45 = 0.675 kg m/s
P.S. I'm not sure of this answer, so it might be a good idea to check this with some other sources.
Change in momentum = 0.675 kg m/s
What is momentum ?
Momentum is a property of a moving body that the body has by virtue of its mass and motion and that is equal to the product of the body's mass and velocity
change in momentum = final momentum - initial momentum
final momentum = m*v = 0.015 * 45 = 0.675 kg m/s
initial momentum = m* v = 0.015 * 0 = 0
change in momentum = 0.675 kg m/s
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a 87 kg block is pulled across the table by the horizontal force of 43N with a fictional force of 7.3 opposing the motion calculate the acceleration of the object
Answer:
a = 0.41 [m/s²]
Explanation:
To solve this problem we must use Newton's second law which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
F = force [N]
m = mass = 87 [kg]
a = acceleration [m/s²]
The frictional force will be taken as negative, since it opposes the movement of the block.
[tex]43-7.3 = 87*a\\35.7 = 87*a\\a=0.41[m/s^{2} ][/tex]
When you cook a steak, what kind of energy do you increase in the steak?
O A. Sound energy
OB. Thermal energy
O C. Nuclear energy
O D. Elastic energy
Answer:
B im pretty sure.
Explanation:
Which equation can be used to solve for acceleration?
t=v/a
vf=at-vi
a=d/t
v=a/t
Answer:
t=v/a
Explanation:
Acceleration is defined as the rate of change of velocity with time. It is mathematically expressed as;
Acceleration = [tex]\frac{Final velocity - Initial velocity}{time}[/tex]
The change in velocity per unit of time is the acceleration
From this equation;
time = [tex]\frac{change in velocity }{acceleration}[/tex]
This expression is analogous to the expression chosen.
1a. for the free body diagram below, are the forces balanced or unbalanced?
Answer:
i think its unbalance because one side has 25 newtons and the other is 20 newtons there not the same
4 Generators are used to convert chemical energy into electrical energy. One company
that designs generators claims that their newest design can convert 1,000 joules of
chemical energy into 1,200 joules of electrical energy. What conclusion can you draw
about this company's design?
A No conclusion can be drawn without more information.
B It has a very good and realistic efficiency.
C It is impossible to convert chemical energy into electrical energy.
D It is impossible to create more energy than was input.
Answer:
fg
Explanation:
bbjtvnjj
At extreme position, velocity is zero but acceleration is maximum in SHM.how can you theoretically explain it?
At extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because of maximum displacement of pendulum.
Why acceleration is maximum when velocity is zero in SHM?At extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because at extreme points the motion of the pendulum is at zero which means that velocity is zero but the pendulum attains maximum displacement. Acceleration is maximum when it gets the extreme position because the displacement is maximum at extreme position. If the velocity of the simple harmonic motion is maximum, the acceleration must be equal to zero and we know that the acceleration is equal to zero only when the particle or object is at initial position.
So we can conclude that at extreme position, velocity is zero but acceleration is maximum in Simple Harmonic motion because of maximum displacement of pendulum.
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Which element is located in period 3 of the periodic table?
A. He
B. K
C. C
D. Al
Answer:
From the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.
Explanation:
We know that the 3rd period contains 8 elements which are as follows:
sodiummagnesiumaluminiumsiliconphosphorussulfurchlorine, and argonThe sodium and magnesium, the first 2 elements, are members of the s-block of the periodic table, while the rest of the members are the elements of the p-block.
Thus, from the given options, the option (D) is correct. Because Al is the aluminium which is located in period 3 of the periodic table.
To what extent do covalent compounds conduct electricity?
O always
O usually
O rarely
O never
Answer:
never....(D)
Explanation:
hope this helps, the person above me is also correct
Covalent compounds never conduct electricity as we know that these compounds are formed by the sharing of electrons where free electrons are unavailable for the flow of the electric current.
Therefore the correct answer is option D.
What is a covalent bond?Covalent bonds are formed between two atoms, whether they are similar or different when they share an extra electron.
The transport of electrons produces the ionic bond.
Intermolecular compounds are known to never carry electricity because they are created by shared electrons, which prevents free electrons from being available for the transmission of an electric current.
Option D is the right response as a result.
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Newton's laws of motion
Answer:second law
Acceleration of an object depends on the mass of the object and the amount of force applied
Which statement compares the attractive forces that hold particles together?
A company has been in business for 40 years. It has tens of thousands of customer addresses in three different computer systems and written on paper in filing cabinets. Which of these people would be MOST helpful in organizing and securing this information?
A.
database administrator
B.
operations research analyst
C.
computer network support specialist
D.
computer user support specialist
The person in charge of information management is the database administrator.
What is a database?The term database refers to the arranging of the data that concerns clients in relevant entry point such as computers and file cabinets. This is the way by which companies are bale to keep track of their customers.
The person that is most helpful in the management of the tens of thousands of customer addresses in three different computer systems and written on paper in filing cabinets is the database administrator.
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A spaceship of mass 2.40x10⁶kg is to be accelerated to a speed of 0.700 c. (a) What minimum amount of energy does this acceleration require from the spaceship's fuel, assuming perfect efficiency?
The minimum energy required is 3.02 x 10²³ joule.
We need to know about relativistic energy to solve this problem. The rest energy of the object can be determined by
Eo = m₀ . c²
where Eo is rest energy, m₀ is rest mass and c is the speed of light (3 x 10⁸ m/s).
The total energy of object can be described as
E = Eo / √(1 - v²/c²)
where E is total energy, v is the object speed.
From the question above, we know that :
m₀ = 2.4 x 10⁶ kg
c = 3 x 10⁸ m/s
v = 0.7c
Find the rest energy
Eo = m₀ . c²
Eo = 2.4 x 10⁶ . (3 x 10⁸)²
Eo = 2.16 x 10²³ joule
Determine the total energy
E = Eo / √(1 - v²/c²)
E = 2.16 x 10²³ / √(1 - (0.7c)²/c²)
E = 2.16 x 10²³ / 0.71
E = 3.02 x 10²³ joule
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2.
What can you infer by looking at the electromagnetic spectrum (see image)? please get it right :(
Please help!!!!!!!!!!!!! :((
Answer:
A.......................
Answer:
the answer you're looking for is A
1. If you throw a ball into the air, the Earth's gravity will cause the ball to
Explanation:
fall at a faster velocity than what it was thrown! Hope this helps!
An earthquake can produce a seiche in a lake in which the water sloshes back and forth from end to end with remarkably large amplitude and long period. Consider a seiche produced in a farm pond. Suppose the pond is 9.15 m long and assume it has a uniform width and depth. You measure that a pulse produced at one end reaches the other end in 2.50s. (b) What should be the frequency of the ground motion during the earthquake to produce a seiche that is a standing wave with antinodes at each end of the pond and one node at the center?
The frequency of the ground motion is 0.2 Hz
What should be the frequency of the ground motion during the earthquake to produce a seiche that is a standing wave with antinodes at each end of the pond and one node at the center?The frequency of the ground motion f = 1/T where T = period of ground motion.
Now, the pond is 9.15 m long and assume it has a uniform width and depth. You measure that a pulse produced at one end reaches the other end in 2.50s.
Since this is a standing wave with antinodes at each end of the pond and one node at the center, we have that the distance between two antinodes is half the wavelength.
Also, the time between two antinodes is half the period.
So, t = T/2
Now, since a pulse produced at one end reaches the other end in 2.50s, this is the time between both antinodes.
So, the period, T = 2t where t = time between antinodes = 2.50 s
So, T = 2t
= 2 × 2.50 s
= 5.0 s
Since the frequency of the ground motion f = 1/T substituting the value of T into f,we have
f = 1/T
= 1/5.0 s
= 0.2 Hz
So, the frequency of the ground motion is 0.2 Hz
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two skateboarders of mass 50 kg and 60 kg push each other with force 70N.what is the acceleration of each skaters
Answer:
0 m/s²
Explanation:
Since each skater pushes the other with a force of 70 N, according to Newton's third law, there is an equal reaction and thus the other pushes back with a force of 70 N in the other direction, so we have forces of +70N and -70 N respectively. So, the net force on each skateboarder is F = + 70 N + (-70 N) = + 70 N - 70 N = 0 N.
Since force, F = ma where a = acceleration and m = mass,
a = F/m.
So, since for each skater, F = 0N,
a = 0 N/m
= 0 m/s²
So, the acceleration of each skater is 0 m/s²
How do animals affect the amount of carbon earth’s atmosphere
Answer:
Animals cerate Carbon Dioxide through the process of respiration.
All animals exhale carbon dioxide out through respiration and increase the level of carbon dioxide in the atmosphere and this is intaken by the plants for photosynthesis.
What is carbon cycle ?Carbon cycle is the geological process that balance the amount of carbon dioxide in the atmosphere and biosphere. Carbon dioxide is an essential gas that maintains the living condition on earth.
All animals inhales oxygen and exhales carbon dioxide out. This carbon dioxide is used by plants to carry photosynthesis in plants. Plants absorb this carbon dioxide and combine with water forming oxygen gas and glucose.
This process repeats cyclically and the level of oxygen and carbon in the atmosphere gets balanced. Therefore, animals have a significant role in carbon dioxide cycle and oxygen cycle.
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what is motion and explain also
Answer:
the action or process of moving or being moved.
Explanation:
In physics, motion is the phenomenon in which an object changes its position over time. Motion is mathematically described in terms of displacement, distance, velocity, acceleration, speed, and time.
Every form of matter has two kinds of properties - What are they?
What is the difference between chemical and physical properties?
Why is melting point a physical property?
this is urgent
Answer:
1-physical properties, and chemical properties.
2-The physical properties of matter are those characteristics that can be measured without altering the atomic structure, while the chemical properties of matter are those.
3-For the change of state to occur, the temperature must be constant. The melting point is an intensive physical property of matter; this means that it is not linked to the amount of substance or the size of the body.
7. A 1.5 N force is applied to an air hockey puck with a mass of 0.10 kg. With what
acceleration does the puck move across the air table?
Answer:
15m/s²
Explanation:
According to Newton's second law;
Force = mass * acceleration
Given
Force = 1.5N
mass = 0.10kg
Required
acceleration
Substitute into the expression;
1.5 = 0.1a
a = 1.5/0.1
a = 15m/s²
Hence the acceleration that the puck move across the air table is 15m/s²
When you slide a box across the floor what force must you push to be stronger than
A) support force
B) friction force
C) gravity
D) air resistance
Answer:
B) Friction force
Explanation:
if the object is heavy then it will need more force to move it unlike a tennis ball for example.
A iron crowbar weighing 85 N is lying on the ground. What force is required to lift one end of it?
Answer:
F L = W * L/2
F = W / 2 = 42.5 N
The crowbar is uniform and can be replaced by a point mass of 85 N at distance of L/2 and the applied force is at a distance of L