1. A roller coaster car rapidly picks up speed it as it rolls down a slope. As it starts
down the slope, its speed is 4 m/s. But 3 seconds later, at the bottom of the
slope, its speed is 22 m/s. What is its average acceleration?

Answer:

Having the inside dimensions (ID) and the outside dimensions (OD) will allow you to figure out the wall thickness on tubing. You would need to subtract the ID from the OD and then divide by two. This number is the wall thickness.

Explanation:

Calculating the average mass of a system involves dividing the total number of masses by the sum of the masses of each individual component (whose average is to be found).

One thousandth (1 x 10-3) of a kilogram is equal to one gram, which is the unit of mass used in the metric system. The mass of one cubic centimeter of pure water at 4°C was used to define the gram's original definition (the temperature at which water has maximum density).

The metric system employs the mass units gram (g), kilogram (kg), and tonne (t) (t). Within the metric system, a gram serves as the fundamental unit of mass. If water is placed in a box that is 1 cm long on all sides, 1 gram of water will be contained within. The mass of water in the box equals one gram. The metric system's prefixes for the units of mass and length are the same: 100 grams equals one kilogram (kg) (g)

To learn more about average mass refer to :

https://brainly.com/question/25797413

#SPJ1

Answer:

2 m/s 2

Explanation: Just is....

Answer:

Explanation:

Use Archimedes' principle, that states something of this nature: "The buoyant force acting on an object immersed in a fluid is equal to the weight of the fluid displaced"

Say, you take a cube of wood(for example) and place it in a bucket of water. Your cube is bound to sink, until, the upthrust force equals its weight.

Where does this upthrust come from?

As the cube sinks, it displaced some volume of water(if the bucket were full you would see water pouring out)

Archimedes simply stated that: Upthrust,

U=mg

Answer: Hope this helps!!!!

Explanation:

Answer:

V = a t      velocity after time t

t = 33.1 / 9.80 = 3.38 sec   (time ball had been falling)

S = 1/2 a t^2 = 55.9 m

So the ball had been falling  for 7 * 8 = 56 m  

The child was 7 floors from the top

Since he was on the eight floor the floors below him were

7 * 8 + 12 = 68 m     total floors below child

68 + 56 = 124 m      total height of building

Total floors in building = 7 + 7 + 1 = 15 floors

PE at top = KE at bottom

KE = m g h = .125 * 9.80 * 124 = 152 Joules

Answer:Lack of experience.

Explanation:

Research from the CDC points to a few key reasons teen drivers are likely to be involved in car accidents: Lack of experience. Teen drivers have triple the fatal crash risk of older drivers, in part because they do not have the skills to recognize and avoid road hazards.

The volume of a gas in liters if 2.95 mol has a pressure of 0.760 atm at a temperature of 52oc is 116.584.

volume of a gas = 2.95 × 0.760 × 52 = 116.584

We understand temperature as the average translational kinetic energy linked to the disordered motion of atoms and molecules, and the kinetic temperature as derived from kinetic theory provides reasonable accuracy. In light of the fact that higher energy molecules are colliding with lower energy molecules and transferring energy to them, it follows naturally that the flow of heat is from a region of high temperature toward a region of lower temperature. Since temperature only measures the kinetic energy portion of internal energy, it is not directly proportional to internal energy, so two objects with the same temperature do not necessarily have the same internal energy (see water-metal example). The three commonly used temperature scales are used to measure temperatures (Celsius, Kelvin, and Fahrenheit).

Learn more about temperature here:

https://brainly.com/question/1191204

#SPJ4

Answer:

C. Television

Explanation:

Mostly in cathode ray television, a TV has many of different types of capacitors, used as connections between circuits, as timing components and as electronic filters. TV capacitors perform many functions.

capacitor acts as a reservoir for electric charge, storing and releasing electricity in precise amounts.

What is a Capacitor  ?

A capacitor is a simple device consisting of a pair of metal foils separated by a thin insulator, such as plastic, used basically for storing charge

Answer:

D) Heating and Cooling system

Explanation:

just took the test and got it right :)

Answer:

Speed = 575 m/s

Mechanical energy is conserved in electrostatic, magnetic and gravitational forces.

Explanation:

Given :

Potential difference, U = \($-3.45 \times 10^{-3} \ V$\)

Mass of the alpha particle, \($m_{\alpha} = 6.68 \times 10^{-27} \ kg$\)

Charge of the alpha particle is, \($q_{\alpha} = 3.20 \times 10^{-19} \ C$\)

So the potential difference for the alpha particle when it is accelerated through the potential difference is

\($U=\Delta Vq_{\alpha}$\)

And the kinetic energy gained by the alpha particle is

\($K.E. =\frac{1}{2}m_{\alpha}v_{\alpha}^2 $\)

From the law of conservation of energy, we get

\($K.E. = U$\)

\($\frac{1}{2}m_{\alpha}v_{\alpha}^2 = \Delta V q_{\alpha}$\)

\($v_{\alpha} = \sqrt{\frac{2 \Delta V q_{\alpha}}{m_{\alpha}}}$\)

\($v_{\alpha} = \sqrt{\frac{2(3.45 \times 10^{-3 })(3.2 \times 10^{-19})}{6.68 \times 10^{-27}}}$\)

\($v_{\alpha} \approx 575 \ m/s$\)

The mechanical energy is conserved in the presence of the following conservative forces :

-- electrostatic forces

-- magnetic forces

-- gravitational forces

a) To find the net charge on the sphere, we first need to find the total area of the surface. The surface area of a sphere is given by:

A = 4πr^2

where r is the radius of the sphere. In this case, the sphere has a diameter of 1.2 m, so the radius is 0.6 m. Therefore, the surface area of the sphere is:

A = 4π(0.6 m)^2 = 4.52 m^2

The total charge on the surface can be found by multiplying the charge density by the surface area:

Q = σA = (8.1 µC/m^2) (4.52 m^2) = 36.6 µC

Therefore, the net charge on the sphere is 36.6 µC.

b) The electric flux emanating from the surface of the sphere can be found using Gauss's Law, which states that the electric flux through any closed surface is proportional to the charge enclosed within the surface.

Since the sphere has a uniform surface charge density, we can assume that the charge is evenly distributed throughout the entire surface. Therefore, we can imagine a hypothetical sphere of radius r < 0.6 m concentric with the original sphere, and use this to find the electric flux through the surface.

The electric field at a distance r from the center of a uniformly charged sphere is given by:

E = kQr / R^3

where k is Coulomb's constant (8.99 x 10^9 Nm^2/C^2), Q is the total charge on the sphere, and R is the radius of the sphere. Using the values Q = 36.6 µC and R = 0.6 m, we can solve for the electric field at a radius r:

E = (8.99 x 10^9 Nm^2/C^2)(36.6 x 10^-6 C) / (0.6 m)^3 * r^2

The electric flux through a spherical surface of radius r is given by:

Φ = E A = E 4π r^2

Substituting the expression for E, we get:

Φ = (8.99 x 10^9 Nm^2/C^2)(36.6 x 10^-6 C) / (0.6 m)^3 * 4π r^2

Simplifying and cancelling terms, we get:

Φ = 4.27 x 10^5 Nm^2/C

Therefore, the total electric flux emanating from the surface of the sphere is 4.27 x 10^5 Nm^2/C.

Total mass lost by the comet is 30.24 x 10¹⁰ kg.

Rate at which mass is lost, R = 35 x 10⁴ kg/s

Time period, T = 100 days = 8.64 x 10⁶s

Therefore,

Total mass lost by the comet, m = R x T

m = 30.24 x 10¹⁰ kg

So,

The fraction of loss = (30.24 x 10¹⁰)/(5 x 10¹⁵) = 60.48 x 10⁻⁵

To learn more about rate of mass loss, click:

https://brainly.com/question/31417203

#SPJ1

Explanation:

x-component:

Vx = Vcos(theta)

= (92.5 m)cos(32.0)

= 78.4 m

Answer:

-78.4

Explanation:

For acellus students

Answer:

I belive it is the thickness of the wire

Explanation:

There are no other answers and I searched it up and it seems that it is the thickness of the wire.

A current is induced in a wire by moving the wire through a magnetic field. A factor that affects the direction of the current is  the direction in which the wire moves.

Magnetic field is the region of space where an object experiences the magnetic force towards a magnetic material.

The direction of flow of electric current in a current carrying conductor wire depends on many factors. The direction of the wire moves in or out and current will flow towards the direction of a given wire.

Hence, a factor that affects the direction of the current is in the direction in which the wire moves.

Learn more about Magnetic field.

https://brainly.com/question/2976218

#SPJ2

Answer:

It is four

Explanation:

You don't need any work to be done, you just kinda slide it off your arms and it could possibly be 5 bcs the backpack falls itself due to the laws of gravity but you do need to throw it

a. The free-body diagrams of the 8.0 kg box and the 2.0 kg mass is attached below.

bi) the acceleration of the system is 0.4 m/s^2

bii)  the tension in the string is 0.8 N.

Net force = ma

Net force = T - F_friction

where T is the tension force and F_friction is the frictional force.

Substituting the given values, we have:

T - F_friction = ma

T - 6.0 N = (8.0 kg + 2.0 kg) a (since the tension force acts on both masses)

T - 6.0 N = 10.0 kg a

(ii) To find the tension in the string, we can apply Newton's second law of motion to the 2.0 kg mass:

Net force = ma

where m is the mass of the mass and a is the acceleration of the system. The net force on the mass is the tension force:

Net force = T

Substituting the given values, we get:

T = ma

T = 2.0 kg x a

To solve for T, we need to find the acceleration of the system.

To find both a and T, we can use the equations we derived above and solve them simultaneously:

T - 6.0 N = 10.0 kg a (equation 1)

T = 2.0 kg x a (equation 2)

Substituting equation 2 into equation 1, we get:

2.0 kg x a - 6.0 N = 10.0 kg a

Solving for a, we get:

a = 0.4 m/s^2

Substituting a into equation 2, we get:

T = 2.0 kg x 0.4 m/s^2 = 0.8 N

Therefore, the acceleration of the system is 0.4 m/s^2 and the tension in the string is 0.8 N. of the system is 0.4 m/s^2 and the tension in the string is 0.8 N.

Learn more about acceleration at: https://brainly.com/question/460763

#SPJ1

torque divided by moment of inertia = angular acceleration inertia = radius squared times mass = 7.533

16.2 ÷ 7.533 = 2.15

The block or case with the highest energy loss is 2, while the one with the lowest energy loss is 3.

Friction occurs as one object moves over a surface or another object and this creates resistance. This means the object that is sliding loses energy or decreases its speed. Friction acts parallel to the surface, and this force opposes the force applied to an object for this to move.

Due to this, if the force is applied in a parallel way the friction will be relatively low because the force applied is directly acting over friction. However, if the force is not parallel as in cases 1 and 2, friction and energy loss increase.

Based on this, case 3 is the one with the lowest energy loss, while case 2 shows the highest energy loss this is because the movement is not parallel and the direction of the force applied will increase the contact between the surface and the block which increases friction.

Learn more in: https://brainly.com/question/24882156

Answer:

At least they found him.

Explanation:

To find the volume of a box, simply multiply length, width, and height.

Formula of volume:

volume is length × width × height.

Units of Measure:

To learn more about volume refers to;

https://brainly.com/question/2605514

#SPJ1

the answer is c because

Cold water sinks because it is more dense than warm water.

Warm water rises because it is less dense than cold water.

Answer:

D and C

Explanation:

Answer: The force that pushes a plane upwards is the lift generated by the wings as the plane moves through the air. The lift force is created by the difference in air pressure above and below the wings, which creates an upward force that opposes the weight of the plane.

Answer: Solubility; decreasing

Explanation:

f = 1.32×10^4 N

Explanation:

We can use the work-energy theorem to find the work done by the braking force f:

W = ∆KE + ∆PE

= (KEf - KEi) + (PEf - PEi)

= [(1/2)mvf^2 - (1/2)mvi^2] + (mhf - mghi)

At the bottom of the slope, vf = 0 and hf = 0 and hi = dsin10° (d = braking distance) so work W becomes

W = -[(1/2)mvi^2 + mgdsin10°]

= -m[(1/2)vi^2 + gdsin10°]

= -(2320kg)[(1/2)(13.4m/s)^2 + (9.8 m/s^2)(22.5m)sin10]

= -2.97×10^5 J

Since W = fd, where f is the braking force, we can now solve for f:

f = W/d = (-2.97×10^5 J)/(22.5 m)

= -1.32×10^4 N

Note: the negative sign means that it is a dissipative force.

Average braking force is 1.32×10^4 N.

A force in physics is an effect that has the power to alter an object's motion. An object with mass can change its velocity, or accelerate, as a result of a force. An obvious way to describe force is as a push or a pull. A force is a vector quantity since it has both magnitude and direction.

We can use the work-energy theorem to find the work done by the braking force f:

W = ∆KE + ∆PE

   = (KEf - KEi) + (PEf - PEi)

   = [(1/2)mvf^2 - (1/2)mvi^2] + (mhf - mghi)

At the bottom of the slope, vf = 0 and hf = 0 and hi = dsin10° (d = braking distance) so work W becomes

W = -[(1/2)mvi^2 + mgdsin10°]

= -m[(1/2)vi^2 + gdsin10°]

= -(2320kg)[(1/2)(13.4m/s)^2 + (9.8 m/s^2)(22.5m)sin10]

= -2.97×10^5 J

Since W = fd, where f is the braking force, we can now solve for f:

f = W/d = (-2.97×10^5 J)/(22.5 m)

= -1.32×10^4 N,  the negative sign means that it is a dissipative force.

Average braking force is 1.32×10^4 N.

To learn more about force refer to the link:

brainly.com/question/13191643

#SPJ2

A Stone Is Dropped Into a Deep Water Well. The Sound of The Stone Hitting The Water Is Heard After 3.4 Seconds. then The Depth of The Water Well is 56.6 m.

In terms of physics, sound is a vibration that travels through a transmission medium like a gas, liquid, or solid as an acoustic wave. Sound is the receipt of these waves and the brain's perception of them in terms of human physiology and psychology. Only acoustic waves with frequencies between about 20 Hz and 20 kHz, or the audio frequency range, may cause a human to have an auditory sensation. These correspond to sound waves in air with an atmospheric pressure of 17 metres (56 ft) to 1.7 centimetres (0.67 in) in wavelength. Ultrasounds are sound waves with a frequency higher than 20 kHz that are inaudible to humans. Infrasound refers to sound frequencies below 20 Hz. Animals of different species have different hearing ranges. Acceleration of the stone is 9.8 m/s²

according to kinematics,

s = ut + 1/2 at²

s =  1/2 ×9.8×3.4²

s = 56.6 m

To know more about Sound :

https://brainly.com/question/29707602

#SPJ1.

Answer:

Explanation:

When discussing Newton's laws of motion, the most likely used terms when talking about Newton's third law of motion are action and reaction. According to this law, for every action there is an equal and opposite reaction

Answer: C. "action" and "reaction"

Explanation: Newtons 3rd law of motion: for every action, there is an equal and opposite reaction (action and reaction forces are described by this law).

Have a nice day. :)

Using the conversion factor that we have seen in the solution, the value obtained is 40.25 kilometers per hours

To convert miles per hour (mph) to kilometers per hour (kph), you need to multiply the speed value in mph by a conversion factor of 1.61, which is the number of kilometers in one mile.

Given that;

1 miles/hour = 1.61 kilometer per hour

25 miles per hour = 25 * 1.61/1

= 40.25 kilometers per hours

Hence the value that we get is 40.25 kilometers per hours

Learn more about miles per hour:https://brainly.com/question/24238048

#SPJ1

The convert unit of  25 miles per hour is equivalent to 40.2335 kilometers per hour

Unit conversion is the process of converting a value expressed in one unit of measurement to another unit of measurement that is equivalent in terms of its value or quantity. This is done by using a conversion factor, which is a numerical factor that relates the two units of measurement.

To convert miles per hour (mph) to kilometers per hour (km/h), we need to multiply the speed in mph by 1.60934, which is the conversion factor from miles to kilometers.

So, to convert 25 mph to km/h:

25 mph × 1.60934 = 40.2335 km/h

Therefore, 25 miles per hour is equivalent to 40.2335 kilometers per hour.

Learn more about convert units below.

https://brainly.com/question/141163

#SPJ1

A master's thesis and a dissertation are typically required for clinical psychology programs. Each of these typically takes one to two years.

Psychology doctoral degrees provide students with the training they need to pursue careers in academic research, professional practice, or both. The most common academic degrees awarded are the Doctor of Philosophy (PhD) or the Doctor of Psychology (PsyD). There are notable disparities between the types of training and professional goals of those with these degrees, even though each is intended to engage students in deep knowledge and abilities within an area of psychology. Understanding these variations is the first step in determining which curriculum is the greatest fit for a particular student.

Learn more about Psychology here-

https://brainly.com/question/1844852

#SPJ9

The interaction that does not take place due to field forces is the interaction between a pen and paper while you write.

Gravity law is a well-established scientific theory that states objects can attract each other according to their masses.

This theory (gravity law) was developed by Sir Isaac Newton to explain the movement of objects.

In conclusion, the interaction that does not take place due to field forces is the interaction between a pen and paper while you write.

Learn more about gravity here:

https://brainly.com/question/1511994

#SPJ1