which of the following is the statement of dalton's law of partial pressures? multiple choice question. pv

Answer:

Explanation:

Answer:

8.0 rad/s

Explanation:

I₁ = 1.0 kgm², ω₁ = -20.0 rad/s (clockwise is positive direction)

I₂ = 4.0 kgm², ω₂ = 15.0 rad/s

Angular momentum conservation:

I₁ω₁ + I₂ω₂ = (I₁ + I₂)ω

1.0 x (-20.0) + 4.0 * 15.0 = (1.0 + 4.0)ω

40.0 = 5.0ω

so ω = 8.0 rad/s

Answer:4

Explanation:

Answer:

-4530 J

Explanation:

Given that

Mass of the car, m = 100 kg

Speed of the car at point A, v1 = 25 m/s

Speed at point B, v2 = 8 m/s

Radius of the track, r = 12 m and with respect to the origin of the center of the track, we say that y1 = -12 at point A and y2 = 12 at point B

We also know that

W(total) = W(grav) + W(other) = K₂ - K₁

Work done by the gravitational force, W(grav) = -U(grav) = mgy1 - mgy2

Kinetic Energy, K = ½mv²

Adding all together, we have

½mv₁² + mgy1 + W(other) = ½mv₂² + mgy2

½ * 100 * 25² + 100 * 9.8 * -12 + W = ½ * 100 * 8² + 100 * 9.8 * 12

50 * 625 + 980 * -12 + W = 50 * 64 + 980 * 12

31250 - 11760 + W = 3200 + 11760

19490 + W = 14960

W = 14960 - 19490

W = -4530 J

The wave front, also known as the wavefront, is an imaginary surface that represents equivalent points of a wave that vibrate in sync. The correct option is D ; 2.0 .

A wave front is described as a surface where the wave's phase remains constant. At any one time, all particles of the medium are moving in the same direction along a certain wave front. Two kinds of wave fronts are very essential. They are plane and spherical wave fronts, respectively. A wavefront is a surface on which the wave disturbance is in the same phase at all places. For example, the ripples of water created when a stone is tossed into a pond.

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The magnitude of vector B is determined as 8.05 units.

The magnitude of a vector is the scalar value of a vector that can  be used to describe the unit value of the vector.

The magnitude of a vector can also be described as the resultant of the vector because it is usually the single value of the vector that can be used to represent the vector.

The magnitude of vector B is calculated as follows;

|B| = √(x² + y² + z²)

where;

|B| = √(4.3² + 4.5² + 5.1²)

|B| = 8.05 units

Thus, we can conclude that vector B with x, y, and z components of 4.3, 4.5, and 5.1 units, respectively, has a magnitude of 8.05 units.

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A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is 3 cm

To find the height of the image, we can use the magnification formula:

Magnification (M) = Image height (h') / Object height (h) = Image distance (d') / Object distance (d)

We are given:
- Object height (h) = 6 cm
- Object distance (d) = 8 cm
- Image distance (d') = 4 cm

We need to find the image height (h').

First, let's find the magnification (M) using the formula:

M = d' / d = 4 cm / 8 cm = 0.5

Now, we can find the image height (h'):

h' = M * h = 0.5 * 6 cm = 3 cm

So, the height of the image is 3 cm.

The question was Incomplete, Find the full content below :

A 6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ___ cm.

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Answer:

True.

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

A concept is the general idea of objects, events, animals, or people based on common features, traits, or characteristics. It is typically considered to be an abstract idea or general notion that is formed by the mental combination of all the characteristics pertaining to the idea.

Generally, concepts are used in the problem-solving process as it serves as a benchmark or yardstick for the solutions. Some examples of concepts in physics are conservation of energy and momentum, electromagnetic waves, heat, motion and forces, electricity and magnetism, gravity, etc.

Answer:

TRUE

Explanation:

edge

The distance that the car travel during each time is:

During this time, the car will travel a total distance of 250 meters.

This can be calculated by using the equation for displacement: displacement = initial velocity x time + 0.5 x acceleration x time^2.

Therefore, the displacement of the car after 10 seconds is:

D= (0 x 10 + 0.5 x 5 x 10^2) = 250 meters.

t= 12 sec

D= (0 x 12 + 0.5 x 5 x 12^2) = 300 meters.

t= 15 sec

D= (0 x 15 + 0.5 x 5 x 15^2) = 375 meters.

t= 18 sec

D= (0 x 18 + 0.5 x 5 x 18^2) = 450 meters.

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Answer:

       d = 6 i^   m

Explanation:

This is an exercise in kinematics, where the position vector is the displacement of the body from one point to another.

In this case we are told that for t = 0 the worm is at x₀ = 3m and with velocity starts from zero, after t = 1 s it is at x₁ = 9m and with a velocity of

v₁ = 5 m / s

They ask what is the displacement for the time of 1 s

               d = x₁ - x₀

               d = 9 -3 m

               d = 6 m

Bold indicates vector, displacement vector is

             d = 6 i ^ m

1) The displacement is 0 mi. Option A

2) The average speed is 20 mi/hr. Option C

3) The average velocity is 0 mi/hr. option A

We know that when we talk about the speed, we would look at the ratio of the average distance to the average time that is taken and this would span the entire journey not only a section of the journey.

We must note that the displacement is a vector quantity and as such, we have to look at the direction of the motion of the object.

Displacement = 5 miles - 5 miles = 0 miles

Average speed = Total distance/ Time = 5 miles + 5 miles/ 0.5 hr = 20 mi/hr

Average velocity = Displacement/Time = 0 miles// 0.5 hr =  0 mi/hr

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Answer:

sadsadasadsdassda

The current flowing over the 30 Ω resistor is 0.4 A.

To discover the current streaming over the 30 Ohm resistor, able to apply Ohm's Law, which states that the current (I) is break even with to the voltage (V) partitioned by the resistance (R). In this case, the voltage over the circuit is given as 9.0 V.

To calculate the full resistance of the circuit, we ought to consider the resistors in arrangement and parallel. The resistors with values of 40 Ω and 50 Ω are in serie.

Hence, the sum of their value (R_series )= 40 Ω + 50 Ω = 90 Ω. The 20 Ω and 10 Ω resistors are in parallel, hence, their resistance is represented as (1/R_parallel) = 1/20 Ω + 1/10 Ω = 1/10 Ω. Disentangling this expression gives R_parallel = 6.67 Ω.

Presently, ready to calculate the entire resistance of the circuit. The resistors with values of 30 Ω and 90 Ω (from the arrangement combination) are in parallel, so their identical resistance is given by 1/R_total = 1/30 Ω + 1/90 Ω = 1/22.5 Ω. Rearranging this expression gives R_total = 22.5 Ω.

At last, able to apply Ohm's Law to discover the current over the 30 Ω resistor. I = V / R_total = 9.0 V / 22.5 Ω ≈ 0.4 A.

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Answer:

it depends on the wind and any other conditions but if you have a controlled environment it should take 1 second to get 40 meters but it could go higher in which it could take about 5 seconds to go 200 meters

Explanation:

hope it helped

:)

The result of the ratio of the displacement module of the second body at the point of meeting is 0.5.

To determine the ratio of the displacement of the first body to the displacement of the second body at the moment of their meeting, use the equation of motion:

d = vt + 1/2at²

where d is the displacement, v is the initial velocity, t is the time, and a is the acceleration.

Since the bodies are moving simultaneously towards each other, then assume that their initial velocities are zero. Also, at the moment of their meeting, their displacement will be the same, d₁ = d₂.

Assume that the time at which they meet is t, then:

d₁ = 1/2 * 2.4t²

And the equation for the displacement of the second body:

d₂ = 1/2 * 4.8t²

If d₁ = d₂

then, 1/2 * 2.4t² = 1/2 * 4.8t²

Solving this equation for t and substituting it into the equation for d₁ or d₂, the ratio of the displacement of the first body to the displacement of the second body: d₁/d₂ = 2.4/4.8 = 0.5 or 1/2

So, at the moment of their meeting, the displacement of the first body is half of the displacement of the second body.

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the period of a mass-spring system with the  characteristics can be calculated using the formula T = 2π√(m/k), where m is the mass of the object and k is the spring constant. the period of the mass-spring system with the given characteristics is approximately 3.14 seconds.

A mass-spring system has the following characteristics: A spring that is initially stretched or compressed has an oscillatory motion around its equilibrium position. This is referred to as a mass-spring system.The period of the mass-spring system is the time it takes for one complete cycle, including compression and extension. The period is given by the equation

`T = 2π * √(m/k)`,

where T is the period, m is the mass attached to the spring, and k is the spring constant. Let's consider an example to better understand this formula: Suppose a mass of 5 kg is attached to a spring with a spring constant of 20 N/m. What is the period of the system?

T = 2π * √(m/k) = 2π * √(5/20) = 2π * √(1/4) = 2π * (1/2) = π ≈ 3.14s

Therefore, the period of the mass-spring system with the given characteristics is approximately 3.14 seconds.

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The energy of the electron in the given region is 9.38 eV.

The given parameters:

When a particle of energy E less than the potential cannot penetrate inside that region.

The exponential factor is calculated as follows;

\(T = e^{-2 \alpha a} \\\\ 0.008 = e^{-2(0.6 \times 10^{-9})\alpha}\\\\ -2(0.6 \times 10^{-9})\alpha = ln(0.008)\\\\ -2(0.6 \times 10^{-9})\alpha = -4.828\\\\ \alpha = \frac{-4.828}{-2(0.6 \times 10^{-9})} \\\\ \alpha = 4.023 \times 10^9\)

The energy of the electron is calculated as follows;

\(\alpha = \sqrt{\frac{2m(U_0 -E)}{h^2} } \\\\ 4.023 \times 10^9 = \sqrt{\frac{2 ( 9.11 \times 10^{-31} kg)(10 \ eV -E) \ \times 1.6\times 10^{-19} \ J/eV}{(1.055 \times 10^{-34} \ J.s)^2 } } \\\\ (4.023 \times 10^9)^2 = \frac{2 ( 9.11 \times 10^{-31} kg)(10 \ eV -E) \ \times 1.6\times 10^{-19} \ J/eV}{(1.055 \times 10^{-34} \ J.s)^2 }\\\\ 2 ( 9.11 \times 10^{-31} )(10 \ eV -E) 1.6\times 10^{-19} = (4.023 \times 10^9)^2 (1.055 \times 10^{-34} \ )^2\\\\ \)

\(10eV - E = \frac{(4.023 \times 10^9)^2\times (1.055 \times 10^{-34} \ )^2}{2 ( 9.11 \times 10^{-31} ) \times 1.6\times 10^{-19}} \\\\ 10eV - E = 0.62 \ eV\\\\ E = 10 \ eV - 0.62\ eV\\\\ E = 9.38 \ eV\)

Thus, the energy of the electron in the given region is 9.38 eV.

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According to the given statement 11.48 m high is the ride’s highest point relative to this starting point.

Speed is the rate of change of a distance with respect to time. Time-distance is one of its dimensions. The result is that the basic units of time and distance are added to produce the SI unit of speed. The Si system of speed is therefore the m per second (m/s).

The following data were obtained from the question:

The roller coaster weighs 1200 Kg in mass (m).

Initial velocity (u) = 15 m/s.

Final speed (v) equals 0 m/s (at highest point)

Acceleration due to gravity (g) = 9.8 m/s²

Highest point (h) =?

The roller coaster's highest point can be found as shown in the illustration below:

h = u²/2g

h = 15² / 2 × 9.8

h = 225/19.6

h = 11.48 m

Therefore, the highest point reached by the roller-coaster is 11.48 m.

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Answer:

–1652 N. The negative sign indicate that the force is in opposite direction to car.

Explanation:

The following data were obtained from the question:

Mass (m) of car = 1400 kg

Time (t) = 11 s

Initial velocity (u) = 25 m/s

Final velocity (v) = 12 m/s

Force (F) applied on the car =?

Next, we shall determine the acceleration of the car. This can be obtained as follow:

Time (t) = 11 s

Initial velocity (u) = 25 m/s

Final velocity (v) = 12 m/s

Acceleration (a) =?

a = (v – u) /t

a = (12 – 25) /11

a = –13/11

a = –1.18 m/s²

Finally, we shall determine the force on the car as follow:

Acceleration (a) = –1.18 m/s²

Mass (m) of car = 1400 kg

Force (F) applied on the car =?

F = ma

F = 1400 × –1.18

F = –1652 N

Thus, the force on the car is –1652 N. The negative sign indicate that the force is in opposite direction to car.

Answer:

Fc = 123 Newton

Explanation:

Net force can be defined as the vector sum of all the forces acting on a body or an object i.e the sum of all forces acting simultaneously on a body or an object.

Mathematically, net force is given by the formula;

\( Fnet = Fapp + Fg\)

Where;

Fnet is the net force.

Fapp is the applied force.

Fg is the force due to gravitation.

Given the following data;

Normal force = 25N

Mass = 10kg

To find the centripetal force;

From the net force, we have the following formula;

Fc = N + mg

Where;

Fc is the centripetal force.

N is the normal force.

mg is the the weight of the object.

Substituting into the formula, we have;

Fc = 25 + 10(9.8)

Fc = 25 + 98

Fc = 123 Newton

Answer:

option c is the correct one

Answer:

Explanation:

Mass of disk = 0.14 kgSpring constant = 155 N/mLength = 4 cmWe need to calculate the speed Using energy conservationWhere, k = spring constantx = compressed lengthm = mass of the discPut the value into the formulaHence, The speed with which the disk slides across the surface is 1.33095 m/s.

Answer: 8.0 m/s2

Explanation:

F = ma

a = F/m

F = 12,000 N

m = 1,500 kg

a = 12,000 N / 1,500 kg = 8.0 m/s2

Complete the following statement: A collision is elastic if...

...the total kinetic energy of the system is conserved before and after the collision, and there is no net loss of energy due to deformation or other non-conservative forces. In an elastic collision, the objects involved bounce off each other without any permanent deformation or generation of heat.

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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:

I KNOW THE ANSWER IT WILL COST 30$

Explanation:

A pitcher throws a baseball towards a batter at 30m/s. The batter swings his bat and hits the baseball, then there is a transfer of energy in this situation : c) Yes, because the force from the bat changes the motion of the ball.

Although baseball may appear hard and solid, it actually behaves much like a rubber ball. In the fraction of a second that ball collides with the swinging bat, ball compresses as the energy of motion goes into deforming the ball and transforms it into an elastic potential energy.

The collision of baseball with bat is elastic and the collision between baseball and glove is nearly inelastic.

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Answer:

Consider a proton travelling due west at a velocity of 5×10^5m/s. Assuming that the rth magnetic field has a strength of 5x10^-5Tand is directed due south calculate li) the magnitude of the force on the proton (q= 1.6x10^-9C)​

Explanation:

According to the graph below, the statements about these cars must be true are :

options B and C are correct

Velocity is described as the directional speed of an object in motion as an indication of its rate of change in position as observed from a particular frame of reference and as measured by a particular standard of time.

There are some similarities  between velocity and speed and they include:  

Velocity (v) is known as a vector quantity that measures displacement (or change in position, Δs) over the change in time.

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The graph is attached below: