A cardboard box sits on top of an asphalt driveway. the coefficient of static friction is 0.7 and the coefficient of friction is 0.4 . the mass of the box is 10 kg and a horizontal force of 15 n is applied. what is the gravitational force?



what is the frictional force?


what is the acceleration?

Answer:

A fuse and circuit breaker both serve to protect an overloaded electrical circuit by interrupting the continuity, or the flow of electricity. ... Fuses tend to be quicker to interrupt the flow of power, but must be replaced after they melt, while circuit breakers can usually simply be reset.

Answer:A resistor

Because Resistance is opposition to the flow of charges in a material. 

The work done to stop the car is -208.33 kJ

From work-kinetic energy principles, the change in kinetic energy of the car ,ΔK equals the work done to stop the car, W.

W = ΔK = 1/2m(v'² - v²) where

Substituting the values of the variables into the equation, we have

W = 1/2m(v'² - v²)

W = 1/2 × 1500 kg(v(0 m/s)² - (16.67 m/s)²)

W = 750 kg(0 (m/s)² - 277.78 (m/s)²)

W = 750 kg(- 277.78 (m/s)²)

W = -208333.33 J

W = -208.33333 kJ

W ≅ -208.33 kJ

So, the work done to stop the car is -208.33 kJ

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When preparing for the Physics ACT test, it is important to focus on the core concepts of physics such as kinematics, forces, energy, work, linear momentum, rotational motion, gravity and thermodynamics.

Kinematics is the branch of classical mechanics that studies the motion of objects without considering the forces that cause the motion. It is concerned only with the description of motion, and deals with the position, orientation, velocity, and acceleration of objects in motion.

Kinematics can be used to describe the motion of objects in a variety of ways, such as linear motion, angular motion, and dynamic motion. It is also used to calculate the trajectory of objects.

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Answer:-

Cognitive behavioral therapy (CBT) is a form of psychological treatment that has been demonstrated to be effective for a range of problems including depression, anxiety disorders, alcohol and drug use problems, marital problems, eating disorders and severe mental illness.  CBT leads to significant improvement in functioning and quality of life.

Hope this help :)

And can u give brainliest.

The goal of cognitive behavioral therapy (CBT), a type of psychotherapy, is to alter unhelpful thought and behavior patterns.

Cognitive Behavioral Therapy (CBT) is a form of psychotherapy that focuses on changing negative patterns of thinking and behavior. It is a goal-oriented and structured therapy that aims to help individuals identify and modify their thoughts and behaviors that may be contributing to psychological distress.

CBT is based on the idea that the way people think about a situation affects how they feel and how they behave. In CBT, therapists work with clients to identify and challenge negative and irrational thoughts and beliefs, and replace them with more realistic and positive ones. This can lead to improved mood and behavior.

CBT is a collaborative therapy, where the therapist and client work together to set goals and develop strategies to achieve them. CBT typically involves a specific number of sessions, with the number and frequency of sessions varying depending on the individual's needs and goals.

CBT has been found to be effective in treating a wide range of mental health issues, including anxiety disorders, depression, post-traumatic stress disorder, obsessive-compulsive disorder, and eating disorders. It is often used in combination with other treatments, such as medication, and can also be adapted for use with children and adolescents.

Therefore, To change unhelpful thought and behavior patterns is the aim of cognitive behavior therapy (CBT), a type of psychotherapy.

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Answer: The air above the ice is cooled.

Explanation: This occurs because the ice melting is an endothermic process, which means energy is absorbed into the ice. This energy/heat is taken from the surrounding air above the pond, which cools the air.

Answer:

B

Explanation:

Answer:

answer is B

Explanation:

took the test

Answer:

Explanation:

25.0 m/s

The I kg cart has a greater kinetic energy at the end of the push. So, the correct option is A).

To determine which cart has a greater kinetic energy at the end of the push, we need to use the formula for kinetic energy, which is

Kinetic energy = 1/2 * mass * velocity²

Calculate the velocity of each cart

Cart 1: Final momentum = mass * velocity, so velocity = final momentum / mass = 10 / 1 = 10 m/s

Cart 2: Final momentum = mass * velocity, so velocity = final momentum / mass = 10 / 2 = 5 m/s

Calculate the kinetic energy of each cart using the formula

Cart 1: KE = 1/2 * 1 kg * (10 m/s)² = 50 J

Cart 2: KE = 1/2 * 2 kg * (5 m/s)² = 25 J

Therefore, the 1 kg cart has a greater kinetic energy at the end of the push. So, the correct answer is A).

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--The given question is incomplete, the complete question is given

"Cart Mass (kg)    1,       2

Applied Force (N)  5,      5

Time Force is Exerted (s)   2,       2

Final Momentum (m/s)   10,         10

Final Kinetic Energy (J)  50

Two frictionless lab carts start from rest and are pushed along a level surface by a constant force Students measure the magnitude and duration of the force on each cart, as shown in the partially completed data table above, and calculate final kinetic energy and momentum. Which cart has a greater kinetic energy at the end of the push?

a. The I kg cart

b. The 2 kg cart

c. Both carts have the same amount of kinetic energy

d. The relationship cannot be determined without knowing the distance each cart moved as the force was being applied."--

In summary, the amount of time a low mass star will stay on the main sequence is determined by its mass, radius, and temperature. Typically, a low mass star will remain on the main sequence for billions of years.

A low mass star is a star that is small in size, mass, and brightness. It is typically around 0.5-2 solar masses and is relatively cool compared to other types of stars. On the main sequence, which is the period when the star is fusing hydrogen into helium in its core, a low mass star can remain for a very long time. The length of time that a low mass star remains on the main sequence is determined by the rate at which it fuses hydrogen into helium in its core. This rate is determined by the star's mass, radius, and temperature. Generally, the lower the mass of the star, the longer it will remain on the main sequence. For example, a star with a mass of 0.5 solar masses will remain on the main sequence for around 20-30 billion years, while a star with a mass of 1 solar mass will remain on the main sequence for around 10 billion years.

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Answer:

1.2×10¹² kg

Explanation:

from

\(f = \frac{gm1m2 }{r {}^{2} } \)

\(m2 = \frac{fr {}^{2} }{gm1} \)

\(m2 = \frac{1.14 \times (75000 { )}^{2} }{6.67 \times {10}^{ - 11} \times 8 \times {10}^{7} } \)

HENCE M2= 1.2×10¹²kg

The gravitational force between the 25 kg and 20 kg objects separated by a distance of 5 m. is found to be 2.67 x 10⁻⁹ N.

The gravitational force between two objects is given by the formula,

F = G*(m₁*m₂)/r², gravitational force is F, gravitational constant (6.674 x 10⁻¹¹ N * m² / kg²) is G, masses of the two objects are m₁ and m₂, and distance between their centers is r.

Plugging in the given values, we get,

F = (6.674 x 10⁻¹¹ N * m² / kg²) * ((25 kg) * (20 kg)) / (5 m)²

F = 2.67 x 10⁻⁹ N

Therefore, the gravitational force between the two objects is 2.67 x 10⁻⁹ N.

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b. We can Connect 3 cells in series to 3 lamps in parallel and place an ammeter on the circuit to measure the current through one of the lamps.

The image is attached.

c. In this  connection, we creates a series connection where the current flowing through each component is the same.

the two cells' positive and negative terminals must be connected in order to complete the circuit. As a result, a parallel connection is formed where the overall current capacity rises while the voltage across each cell stays the same.

The positive terminal of the first light would be connected to the negative terminal of the second lamp in order to link the two lamps and a motor in series. The second lamp's positive terminal would then be connected to one of the motor's terminals. Finally, you would attach the other motor terminal to the first lamp's negative terminal.

This establishes a series connection in which each component receives the same amount of current.

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Answer:

1. B. Impulse = Force × Time

2. A. The momentum of each ball changes, and the total momentum stays the same

3. -55 kg·m/s

4. B. 3.5 kg

5. C. 6.3 m/s

Explanation:

1. The impulse is the momentum change of an object due to a force applied for a given period

2. Given that the objects collide, and the force of the 3 kg mass moving with 24 kg·m/s acts on the 1 kg mass while the total momentum is conserved;

The stationary ball of mass 1 kg begins to moves at certain velocity after collision and therefore changes momentum, while the velocity of the ball of mass 3.0 kg reduces and the total combined momentum of the two balls in the closed system remains the same

3. By the principle of conservation of linear momentum, we have;

The sum of the momentum before the collision = The sum of the momentum after collision

Given that the objects move together after the collision, the total momentum is therefore;

Total momentum = 110 kg·m/s + -65 kg·m/s + -100 kg·m/s = 110 kg·m/s - 65 kg·m/s - 100 kg·m/s  = -55kg·m/s

4. Given that the final velocity of the two objects (m₁ + m₂) combined = 50 m/s

Where;

m₁ = The mass of the first object

m₂ = The mass of the second object

The total momentum of the system = 250 kg·m/s

From momentum = Mass × Velocity, we have;

Mass = Momentum/Velocity = 250 kg·m/s/(50 m/s) = 5.0 kg

The mass (m₁ + m₂) = 5.0 kg

Given that m₁ = 1.5 kg, we have;

m₂ = 5.0 kg - m₁ = 5.0 kg - 1.5 kg = 3.5 kg

The mass of the second object = 3.5 kg

5. The mass of the cue stick = 0.5 kg

The velocity of the cue stick = 2.5 m/s

The mass of the ball = 0.2 kg

The initial velocity of the ball = 0 m/s

Given that total initial momentum = Total final momentum, we have;

0.5 kg × 2.5 m/s + 0.2 kg × 0 = 0.2 kg × v + 0.5 kg × 0

0.5 kg × 2.5 m/s = 0.2 kg × v

v = (0.5 kg × 2.5 m/s)/(0.2 kg) = 6.25  m/s ≈ 6.3 m/s

The force of attraction between two bodies is 6.67×10⁻⁷N. This force will remain same for the two bodies whether they are on the earth or on the moon.

Given that,

mass of two bodies each= 100kg

distance between them= 1m

We know that,

\(F= G\)×\(\frac{M1 M2}{R^{2} }\)

Where, F=force

M1= mass of one body

M2= mass of another body

G= gravitational force [6.67×10⁻¹¹]

R= distance between the two bodies

Substituting the given values, we have

F= 6.67×10⁻¹¹×\(\frac{10000}{1^{2} }\)N

 = 6.67×10⁻⁷N

As per Newton's law of gravitation, the force of attraction between two bodies is proportional to the product of the individual masses of the two bodies and inversely proportional to the square of the distance between them. This force will remain same for the two bodies whether they are on the earth or on the moon.

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It should be noted that the student should use K = 1/2mv² with the initial speed of the block for one trial.

From the complete information, the student wants to use the data collected and the known quantities from the experiment to determine the initial total mechanical energy of the block-ramp-Earth system for all trials in the experiment.

In this case, it's important to use K = 1/2mv² with the block's initial speed for one trial due to the fact that the initial speed is the same in all the trials.

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0

We know

\(\\ \rm\hookrightarrow Y=\dfrac{Stress}{Strain}\)

\(\\ \rm\hookrightarrow Y=\dfrac{\sigma}{\Delta \ell/\ell}\)

\(\\ \rm\hookrightarrow Y=\dfrac{0}{\Delta \ell/\ell}\)

\(\\ \rm\hookrightarrow Y=0\)

Answer:

theroy of plate tectonics

Answer:

Kinda? Depends what the question is fully asking

Explanation:

Acceleration is a change in velocity. So I guess if the velocity of something is -2 m/s and its positively accelerating at a value of +1 m/s, then that means every second its velocity changes by +1m/s.

So that -2 m/s thing after one second will be going -1 m/s.

After another second it'll be going 0 m/s.

After another itll be going +1 m/s and so on.

So at one point for a brief moment, it can have an acceleration but be at 0 m/s velocity.

Answer:

I think C.

Explanation:

If I'm wrong, please do not hesitate to let me know

The new volume is approximately 23.16 L when the nitrogen gas is compressed from 748 mmHg to 725 mmHg at constant temperature.

Use the combined gas law to determine the relationship between a gas's pressure, volume, and temperature:

P1V1/T1 = P2V2/T2

where the gas's starting pressure, volume, and temperature are P1, V1, and T1, and its ultimate pressure, volume, and temperature are P2, V2, and T2.

The equation may be made simpler by saying: since the temperature is constant.

P1V1 = P2V2

Substituting the given values, we get:

725 mmHg × V2 = 748 mmHg × 22.5 L

Solving for V2, we get:

V2 = (748 mmHg × 22.5 L) / 725 mmHg

V2 = 23.16 L

A gas law known as the combined gas law connects a gas's pressure (P), volume (V), and temperature (T). It combines Boyle's law, Charles' law, and Gay-law, Lussac's three additional gas laws.

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a) The free body diagram (FBD) for the mass would include the force of gravity (Fg) acting downward , the tension force (T) acting at an angle from the vertical, and the centripetal force (Fc) acting toward the center of the circle.

b) the tension on the rope is T = 215.5 N. c) The angle that the rope makes with the vertical is 61.4°. A conic pendulum is a type of pendulum that rotates in a horizontal circle while hanging from a fixed point.

The force that causes the mass to rotate is the tension in the rope. In this case, the mass of the pendulum is 12 kg, the length of the rope is 2.0 m, and the period of rotation is 2.1 s.


The tension on the rope can be found using the equation for centripetal force:

Fc = (m*v^2)/r

Where m is the mass, v is the velocity, and r is the radius of the circle. The velocity can be found using the equation v = 2πr/T, where T is the period of the rotation. Substituting the values given in the question:

v = (2π*2.0)/2.1 = 5.99 m/s

Fc = (12*5.99^2)/2.0 = 215.5 N

The tension force is equal to the centripetal force, so T = 215.5 N.

c) The angle that the rope makes with the vertical can be found using the equation tanθ = Fc/Fg, where Fg is the force of gravity. The force of gravity can be found using the equation Fg = mg, where g is the acceleration due to gravity (9.8 m/s^2):

Fg = (12*9.8) = 117.6 N

tanθ = 215.5/117.6 = 1.83

θ = tan^-1(1.83) = 61.4°

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A 44.5 n hammer falls from a 100 m radar tower being repaired by a mechanic 4450 J worth of work is done on the hammer as it falls.

Work= Force *Distance

= 44.5*100

= 4450 J.

Distance is a measurement of the distance between two objects or location. In physics, the term "distance" can refer to an actual length or, more commonly, to an estimate based on several other parameters. The sign |AB| may occasionally be used to denote a distance between two places.

To calculate the distance, use the formula d = st, or distance equal speed multiplied by time.

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Here is a problem.

Problem:-

A car of mass 1700kg accelerated with a rate of 17m/s^2. find the force applied on it.

Extra:-

F=ma is. the famous formula of Sir Eizak Newton

The answer is above but I don't know if it's correct.

Answer: abdominal muscles.

Explanation:

Albert Einstein's 1905 theory of special relativity is one of the most important papers ever published in the field of physics. Special relativity is an explanation of how speed affects mass, time and space.

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Answer:  its C- Albert Einstein

Explanation: the person above me is right and I also got it right on the test.

Aceleration refers to motion but gravity refers to force

Acceleration is change of velocity with time while gravity is the force of attraction pulling objects. When this force pulls an object it tends to move with a certain type of acceleration called acceleration due to gravity. This is equal to 9.8 m / s^2 for earth

Acceleration is the rate of change in velocity. While g is the acceleration due to gravity. The pace at which a body's velocity varies is represented by acceleration, which is a vector quantity.

The rate of change of velocity with respect to time is known as acceleration. According to Newton's second law, the eventual effect of all forces applied to a body is its acceleration.

\(\rm a = \frac{v-u}{t}\)

u is the initial speed

v is the final speed

t is the time interval

a is the acceleration of the ball

Gravitation is a natural law by which all things with all matter are attracted towards one another.

g is the acceleration due to gravity. whose value is equal to 9.81 m/sec².The value of the gravitational acceleration varies according to the height and the planet.

The value of the gravitational acceleration on the earth is 9.81 m/sec².While the value of g at the moon is 1.6333 m/sec².

Hence acceleration is the rate of change of velocity. While g is the acceleration due to gravity.

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The wavelength of the photon with mass m=9.11×10⁻³¹kg and the transition taking place between n=6 and the n=7 state is λ=570.4nm.

The photon or light has dual nature of light(i.e. the light has matter and wave nature). The wavelength of the wave is defined as the distance between two crests and two waves.

From the given, The wavelength of the light makes the electron pumps form the nth state to (n+1)th state.

mass of the electron, m=9.11×10⁻³¹kg

nth state = 6

n+1 state =7

speed of light(c) = 3×10⁸ m/s

L = 1.5×10⁻⁹

Wavelength(λ) = 4mcL²/(2n+1)π(h/2π), where h is the Planck's constant and is equal to 6.626×10⁻³⁴.

λ = 4mcL²/(2n+1)π(h/2π)

  = 4×9.11×10⁻³¹×3×10⁸ ×(1.5×10⁻⁹)² / (2×6+1)π( 6.626×10⁻³⁴/2π)

 = 4×9.11×10⁻³¹×3×10⁸ ×(1.5×10⁻⁹)² / (2×6+1)×3.14( 6.626×10⁻³⁴/6.28)

 = 5.704×10⁻⁷m

 =570.4 ×10⁻⁹m

Thus, the wavelength of the photon is 570.4nm.

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Answer:

Correct Answer: Option B

Explanation:

Explanation

P1/T1 = P2/T2

80/(273+47) = P1/(273+27) = 75Nm-2

Answer: 75.0 Nm^-2

Explanation:

P1/T1 = P2/T2 80/(273+47) = P1/(273+27) = 75Nm-2