A car is rolling backwards when I hit the gas after 8.2 five seconds it is movie Florida 8.62 M/s is 12.9m to the right of its starting point

Answer:

force on brake shoes is 10 N

Explanation:

for the master cylinder;

force applied = 140 N

diameter = 14d

for brake cylinder;

force applied on the brake shoe by the brake cylinder f = ?

diameter = d

The pressure will be transmitted undiminished from the master cylinder to the brake cylinder according to pascals pressure law.

pressure = force/area

but cross sectional area is proportional to diameter of the cylinder

therefore

\(\frac{140}{14d } = \frac{f}{d }\)

the diameters will cancel out, and we're left with

force on brake shoes = 10 N

Explanation:

a clinical thermometer is a thermometer used to measure human body temperature. mostade in the 20th century are mercury-in-glass thermometer. they ate accurate and sensitive having a narrow place where the mercury level rises very fast. a kink in the tube stops the mercury level from falling on its own.

hope it helps you

Answer: 472.556m⋅s−1

Explanation: λ=7.83cm=7.83⋅(1cm)=7.83⋅(1cm×0.01m1cm)=0.0783m

It requires much less force to accelerate a low mass object because force is directly proportional to mass according to Newton's second law of motion.

Newton's second law states that the force acting on an object is equal to the product of its mass and acceleration, and it can be expressed as F = m * a. This means that for a given force, if the mass of an object is lower, the resulting acceleration will be higher.When a force is applied to an object, its mass determines how much inertia the object possesses. Inertia refers to an object's resistance to changes in its motion. Objects with lower mass have less inertia, making it easier to change their velocity or accelerate them. With less mass, there is less resistance to overcome, and a smaller force is needed to produce the same acceleration compared to a heavier object.In practical terms, this means that low mass objects can be accelerated more easily and quickly compared to high mass objects. It is why lighter objects can be moved, lifted, or accelerated with less effort or force applied to them.

To know more about inertia, click here https://brainly.com/question/3268780

#SPJ11

Answer:

The smallest particle in a chemical element or compound is called a molecule. Molecules are composed of atoms bonded together by chemical bonds. The sharing or exchange of electrons between atoms forms these bonds. Two hydrogen atoms are an example of a molecule.

Answer:

The answer is C.

Explanation:

A "confederation" is a system of government in which member states retain almost all of their sovereign authority and delegate limited powers to a weak central body.

In a confederation, the central government has limited authority and primarily serves as a coordinating body for the member states. The member states maintain a significant degree of independence and have the power to make decisions on matters that directly affect them.

Know more about confederation here:

https://brainly.com/question/30619807

#SPJ11

The weight falls 4.9 metres in total throughout the first 1.0 seconds.

To learn more about the total distance the weight falls refer to:

https://brainly.com/question/864882

#SPJ1

Answer:

15 units NE

Explanation:

Assuming the coordinate plane is a compass with N being the positive y-axis, we can use the Pythagorean theorem to find the magnitude of the vector. Since the vector is going up by 12 and right by 9 at the same time, it should form a diagonal line, aka the hypotenuse of a triangle. This triangle has both of its leg units as 12, and 9. Pythagorean theorem states that a^2 + b^2 = c^2, that is both of their legs squared is the hypotenuse of the triangle squared. 12^2 + 9^2 = c^2. c = 15. Now that we know the magnitude, let's go back to the quadrants as the compass. Since both units are positive, the vector goes in the positive direction on both sides, which is Quadrant 1. North and East would be the appropriate say for the vector's direction, thus the vector's direction will be 15 units North East.

(a) The time for the sphere A to hit the floor is 0.5 second.

(b) The time for the sphere B to hit the floor is 0.5 second

(c) The distance travelled by sphere A from the edge of the table is 1.75 m.

(d) The distance travelled by sphere B from the edge of the table is 0.75 m.

The time of motion of sphere A is calculated by applying the following formula.

t = √ ( 2h / g )

where;

t = √ ( 2 x 1.2 / 9.8 )

t = 0.5 second

The time of motion of sphere B is calculated as;

t = √ ( 2 x 1.2 / 9.8 )

t = 0.5 second

The distance travelled by sphere A from the edge of the table is calculated as;

d = vt

where;

d = 3.5 m/s  x 0.5 s

d = 1.75 m

The distance travelled by sphere B from the edge of the table is calculated as;

d = 1.5 m/s  x  0.5 s

d = 0.75 m

Learn more about horizontal distance here: https://brainly.com/question/24784992

#SPJ1

The number of walking paces as you walk down main street (0.25 miles) is 720 walking paces

1 mile = 5280 feet

Therefore,

0.25 mile = (0.25 mile × 5280 feet) / 1 mile

0.25 mile = 1320 feet

1 feet = 12 inches

Therefore,

1320 feet = (1320 feet × 12 inches) / 1 feet

1320 feet = 15840 inches

22 inches = 1 walking pace

Therefore,

15840 inches = (15840 inches × 1 walking pace) / 22 inches

15840 inches = 720 walking paces

Thus, we can conclude that as you walk down main street (0.25 miles), there are 720 walking paces

Learn more about conversion:

https://brainly.com/question/15118262

#SPJ1

Answer:

Work done by the shopper on the cart: The force of 40 N at an angle of 30 degrees downward from the horizontal can be resolved into its horizontal and vertical components. The horizontal component of the force is:F_horizontal = F * cos(theta) = 40 N * cos(30) = 34.64 N

The work done by the shopper on the cart is equal to the force applied multiplied by the distance moved, multiplied by the cosine of the angle between the force and the displacement. In this case, the displacement is 15 m, and the angle between the force and the displacement is 30 degrees. Therefore:Work = F * d * cos(theta) = 34.64 N * 15 m * cos(30) = 448.5 J

Speed of the cart at the tofu section: The initial potential energy of the cart and shopper is equal to their combined mass (85 kg) multiplied by the acceleration due to gravity (9.81 m/s^2) multiplied by the height of Twin Peaks (600 m). 

Therefore: Potential energy = m * g * h = 85 kg * 9.81 m/s^2 * 600 m = 498,690 J

Since the shopper neglects friction, all of the potential energy is converted into kinetic energy at the bottom of the hill. The kinetic energy of the cart and shopper can be found using the formula:

Kinetic energy = 0.5 * m * v^2

where m is the mass of the cart and shopper, and v is their speed.

Therefore:Kinetic energy = 0.5 * 85 kg * v^2 Since the potential and kinetic energies are equal, we can set them equal to each other and solve for the speed v: Potential energy = Kinetic energym * g * h = 0.5 * m * v^2v = sqrt(2 * g * h) = sqrt(2 * 9.81 m/s^2 * 600 m) = 109.43 m/s

Power exerted by the shopper in stopping the cart:The shopper brings the cart to rest over a distance of 15 m in a time of 2.7 s. The average force exerted by the shopper on the cart can be found using Newton's second law: F = m * a = m * (v_f - v_i) / twhere m is the mass of the cart, v_i is the initial speed of the cart (which is zero), v_f is the final speed of the cart, and t is the time taken to stop the cart. Solving for F gives:F = m * (v_f / t)The work done by the shopper in stopping the cart is equal to the force applied multiplied by the distance moved, which is 15 m. Therefore:Work = F * d = m * (v_f / t) * d = 24 kg * (0 - 0) / 2.7 s * 15 m = 0 JSince no work is done in bringing the cart to rest, the power exerted by the shopper is zero.Acceleration due to gravity on the unknown planet:The final speed of the 4 kg ball is 12 m/s, and it falls a distance of 60 m. The initial speed is zero, so the final velocity is equal to the velocity acquired due to gravity. The final velocity can be found using the formula:v_f^2 = v_i^2 + 2 * g * hwhere v_i is the initial velocity (which is zero), h is the height fallen, and g is the acceleration due to gravity.

Answer:D) It cannot be determined without more information,

Explanation:

Answer:

elp me please with the question  p osted rn im

taking a test and need it

Explanation:

At that point, you would observe a dark fringe in the interference pattern created by the two beams of light. This is because the two waves destructively interfere with each other and cancel out their amplitudes. The exact location of the dark fringe will depend on the exact geometry of the paths taken by the two beams.

This scenario describes a classic example of an interference pattern created by two beams of light. The two beams will interact with each other when they meet at the same point, and the resulting pattern will depend on the phase difference between the two beams.The phase difference depends on the path length difference between the two beams. If the path length difference is equal to an integer multiple of the wavelength of the light, then the two beams will be in phase and will reinforce each other, creating a bright spot. If the path length difference is equal to a half-integer multiple of the wavelength of the light, then the two beams will be out of phase and will cancel each other out, creating a dark spot.

In this scenario, the wavelength of the light is 750 nm, and the path length difference is 1500 nm. This means that the path length difference is exactly equal to twice the wavelength of the light. Therefore, the two beams will be exactly out of phase when they meet at the same point, and they will create a dark spot.

Here you can learn more about wavelength

https://brainly.com/question/13093207

#SPJ4

(a) The sub transient current in per unit at the fault is approximately 0.6428, in the generator is approximately 2.523, and in the motor is approximately 0.9190.

(b) Using Thévenin's theorem, the subtransient current in per unit at the fault is approximately 0.6428.

(a) Computing the voltages behind subtransient reactance:

To find the subtransient current in per unit at the fault, in the generator, and in the motor, we need to compute the voltages behind subtransient reactance in both the generator and motor.

Per-unit subtransient reactance of the generator (X''g) = 0.15

Per-unit subtransient reactance of the motor (X''m) = 0.35

Leakage reactance of the transformer (Xl) = 0.10

Terminal voltage of the generator (Vg) = 0.9 per unit

Output current of the generator (Ig) = 1.0 per unit

Power factor of the generator (pf) = 0.8 leading

The subtransient voltage in the generator (V''g) can be calculated using the formula:

V''g = Vg - (X''g * Ig)

V''g = 0.9 - (0.15 * 1.0)

V''g = 0.75 per unit

The subtransient voltage in the motor (V''m) can be calculated using the formula:

V''m = V''g * (X''g / X''m)

V''m = 0.75 * (0.15 / 0.35)

V''m ≈ 0.3214 per unit

Now, let's calculate the subtransient current at the fault (If):

If = V''m / (X''m + Xl)

If = 0.3214 / (0.35 + 0.10)

If ≈ 0.6428 per unit

The subtransient current in the generator (I''g) can be calculated using the formula:

I''g = (V''g - V''m) / X''g

I''g = (0.75 - 0.3214) / 0.15

I''g ≈ 2.523 per unit

The subtransient current in the motor (I''m) can be calculated using the formula:

I''m = (V''m - 0) / X''m

I''m = 0.3214 / 0.35

I''m ≈ 0.9190 per unit

Therefore, the subtransient current in per unit at the fault is approximately 0.6428, in the generator is approximately 2.523, and in the motor is approximately 0.9190.

(b) Using Thévenin's theorem:

By using Thévenin's theorem, we can calculate the subtransient current at the fault (If) directly.

The equivalent impedance looking back into the generator and motor combined can be calculated as:

Zeq = (X''g * X''m) / (X''g + X''m + Xl)

Zeq = (0.15 * 0.35) / (0.15 + 0.35 + 0.10)

Zeq ≈ 0.0567 per unit

The equivalent subtransient voltage behind the impedance (Veq) can be calculated as:

Veq = Vg - (Zeq * Ig)

Veq = 0.9 - (0.0567 * 1.0)

Veq ≈ 0.8433 per unit

Finally, the sub-transient current at the fault (If) is given by:

If = Veq / (Zeq + X''m)

If = 0.8433 / (0.0567 + 0.35)

If ≈ 0.6428 per unit

Therefore, using Thévenin's theorem, the sub-transient current in per unit at the fault is approximately 0.6428.

Learn more about generators at https://brainly.com/question/12475693

#SPJ11

The minimum speed at which a car can negotiate this banked curve, even in the complete absence of friction, is approximately 18.8 m/s.

The speed at which a car can negotiate a banked curve with a given radius and banking angle, even in the complete absence of friction, is called the "no-slip" or "minimum" speed.

here,

The gravitational force acting on the car is balanced by the normal force provided by the banked surface, and the car moves in a circular path with no slipping or skidding.

The minimum speed for a car to negotiate a banked curve can be found using the following equation:

v = √(r * g * tan(θ))

In this case, the radius of the curve is 75.0 m, and the banking angle is 15.0 degrees or 0.262 radians. Plugging these values into the equation, we get:

v = √(75.0 * 9.8 * tan(0.262))

v ≈ 18.8 m/s

Therefore, the minimum speed at which a car can negotiate this banked curve, even in the complete absence of friction, is approximately 18.8 m/s.

Learn more about banking of roads here;

https://brainly.com/question/30817030
#SPJ1

Answer:

1.29 N

Explanation:

The equation for force (with work and distance) is:

\(Force=\frac{Work}{distance}\)

We can plug in the given values into the equation:

\(Force=\frac{9J}{7m}$\approx1.29 N\)

A force of 1.29 N is required to move 7 meters if the work done is 9 J.

Work can be described as the product of the component of the force (F) in the direction of displacement (d) and the magnitude of this displacement. Work can be described as the energy utilized when a force is applied to move a body through a displacement.

The force acts to move an object in the direction of the applied force over a distance in a straight line.

W= F × d

Where W is work done, 'F' is the applied force, and 'd' is the displacement.

Given, the work done by the applied force, W = 9 J

The displacement by an object, d = 7 m

The force applied to the object can be determined as F = W/d

\(F = \frac{9J}{7m}\)

\(F = 1.29\times \frac{N.m}{m}\)

F = 1.29  N

Therefore, the force required is equal to 1.29 N.

Learn more about work, here:

brainly.com/question/13662169

#SPJ2

While standing in a low tunnel, you raise your arms and push against the ceiling with a force of 100 N and mass is 70 kg.

Hence, the correct option is C.

When you push against the ceiling with a force of 100 N, the ceiling exerts an equal and opposite force on you (Newton's third law). This means that the ceiling exerts a force of 100 N on you downwards.

The force that the ceiling exerts on you is also known as the normal force (N) because it is perpendicular to the surface (ceiling) on which you are applying the force.

To calculate the force that the floor exerts on you, we need to consider the forces acting on you in the vertical direction. There are two forces your weight (due to gravity) and the normal force from the floor. When these forces are in equilibrium, you are not accelerating in the vertical direction, i.e. you are at rest.

The weight of you is given by

W = mg

Where W is the weight, m is the mass, and g is the acceleration due to gravity (9.8 m/\(s^{2}\)).

W = (70 kg)(9.8 m/\(s^{2}\)) = 686 N

W = 686 N

Since you are at rest, the forces in the vertical direction must balance each other out. Therefore, the normal force from the floor must be equal to your weight.

Normal force from floor = W = 686 N

Therefore, the force that the floor exerts on you is 686 N.

Hence, the correct option is C.

To know more about push here

https://brainly.com/question/4310929

#SPJ4

Answer:

B. A dish of water is placed in the freezer and turns solid

Explanation:

it is a physical change because it can return to its original state by physical means. the other options are chemical changes because things like color change, bubbles or fizzing, and odor change all indicate a chemical change and cannot return to the original state it was in before.

In order to determine the density of a cylinder, we need to know its mass and volume. The mass of the cylinder is given as 29.2 grams, but the volume is not provided. Without the volume, it is impossible to calculate the density of the cylinder.

As for whether or not the cylinder will float in water, that also depends on its density. If the density of the cylinder is less than the density of water (1), then it will float. However, without knowing the density of the cylinder, it is impossible to determine whether or not it will float in water.

Answer:

333 m

Explanation:

The following data were obtained from the question:

Initial velocity (u) = 0 m/s.

Time (t) = 8.14 s.

Final velocity (v) = 80.79 m/s.

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

Height (h) =?

v² = u² + 2gh

80.79² = 0 + (2 × 9.8 × h)

6527.0241 = 0 + 19.6h

6527.0241 = 19.6h

Divide both side by 19.6

h = 6527.0241 / 19.6

h = 333 m

Thus, the plane was at a height of 333 m when the package was dropped.

Answer:

A. 0.83 hours

Explanation:

The magnetic field at 10.76 m below the high voltage power line is approximately 41,835,820 µT when the line carries 450 MW at a voltage of 300,000 V. Rounded to the nearest integer, the magnetic field is 41,836 µT.

To calculate the magnetic field at a distance below a high voltage power line, we use the formula \(B=\frac{u0IH}{2\pi r}\)

Current, I = 450 MW = 450 × 10^6 W

Height, H = 0 m (since the power line is at ground level)

Distance below the power line, r = 10.76 m

Using the formula for the magnetic field, we substitute the given values:

\( B = \frac{{(4\pi \times 10^{-7} \, \text{{T}} \cdot \text{{m/A}}) \cdot (450 \times 10^6 \, \text{{W}}) \cdot (0 \, \text{{m}})}}{{2\pi \cdot 10.76 \, \text{{m}}}} \)

Simplifying the expression:

\( B = \frac{{450 \times 10^6 \, \text{{W}}}}{{10.76 \, \text{{m}}}} \)

Calculating the value:

\( B \approx 41,835,820 \, \text{{T}} \)

Rounding the magnetic field to the nearest integer:

\( B \approx 41,836 \, \mu\text{{T}} \)

Therefore, the magnetic field at 10.76 m below the high voltage power line is approximately 41,836 µT (rounded to the nearest integer).

To learn more about magnetic field  Click Here: brainly.com/question/14848188

#SPJ11

Answer:

Doubling the speed.

E - M v^2

M = W / g     energy is proportional to weight

But energy is proportional to v^2

The estimated overall resistance of the heating element is approximately 0.99 Ω. We can use the formula for the resistance of a wire.

To estimate the overall resistance of the heating element, we can use the formula for the resistance of a wire:

R = (ρ * L) / A

where R is the resistance, ρ is the resistivity of the material, L is the length of the wire, and A is the cross-sectional area of the wire.

Given:

Length of the wire (L) = 220 cm = 2.20 m

Diameter of the wire (d) = 0.56 mm = 0.056 cm = 0.00056 m

Resistivity of nichrome (ρ) = 110 × 10^(-8) Ω·m

First, we need to calculate the cross-sectional area (A) of the wire using the diameter:

A = π * (d/2)^2

Substituting the values:

A = π * (0.00056/2)^2

= π * (0.00028)^2

= π * 7.84 × 10^(-8) m^2

≈ 2.461 × 10^(-7) m^2

Now, we can calculate the resistance (R):

R = (ρ * L) / A

= (110 × 10^(-8) Ω·m * 2.20 m) / 2.461 × 10^(-7) m^2

= 0.99 Ω

Therefore, the estimated overall resistance of the heating element is approximately 0.99 Ω.

To learn more about resistance click here

https://brainly.com/question/17010736

#SPJ11