A 1210 kg car is driving NE (at
45.0°) at 15.2 m/s when it is
struck by a moving 1540 kg car.
Afterward, they stick together and
move directly east (at 0°) at 23.3
m/s. What was the y-component
of the second car's initial velocity?

Applicate formula:

Vf² = Vo² + 2ad

Clearing a:

a = (Vf² - Vo²) / 2d

Replacing:

a = ((20 m/s)² - 0 m/s)²) / 2 * 2 m

a = 400 m²/s² / 4 m²

a = 100 m/s²

The aceleration is 100 m/s²

Thermal expansion is directly proportional to the change in temperature.

Thermal expansion is directly proportional to the change in temperature. When the temperature of a material increases, the material expands due to the increase in the average kinetic energy of its particles, causing the material to occupy more volume.

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Answer:

The answer is 2N

Explanation:

Now,

Radius (r) = Diameter ÷ 2

r = 1/2

r = 0.5 mm = 5 × 10‾⁴

T = 3.14 ÷ 10 = π/10 sec

∴ F = mrω² = mr (2π/T)² = 4π²mr/T²

F = 4 π² × 10 × 5 × 10‾⁴/(π/10)²

F = 4 π² × 10 × 5 × 10‾⁴ × 100/π²

F = 4 × 0.5

F = 2 N

Thus, The centripetal force acting on it is 2 Newton

-TheUnknownScientist 72

Answer:

b

Explanation:

The complete table are:

Variable Changed : outcome

In regards to the question, It's important to note that these predictions are based on basic physics principles and assumptions, and actual results may vary depending on the specific materials and measurements used in Darnell's bell design.

Additionally, other variables such as the shape and thickness of the bell may also affect the loudness of the ring, so Darnell may want to consider these factors as well when making changes to his design.

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The length of the board of wood expressed in meters is 0.616 m.

To convert 61.6 cm to meters, we can use the formula:

Length in meters = Length in centimeters ÷ 100

Plugging in the given value, we get:

Length in meters = 61.6 cm ÷ 100 = 0.616 m

Wood is a natural composite material made of cellulose fibers, lignin, and hemicelluloses, which are held together by a complex network of bonds. The cellulose fibers provide strength and rigidity, while the lignin acts as a binder, holding the fibers together. The hemicelluloses are responsible for the elasticity and flexibility of the material.

Wood has many interesting physical properties that make it a valuable material in a wide range of applications. For example, it is a good insulator, making it useful for construction and electrical applications. It is also a good acoustic absorber, making it useful in musical instruments and recording studios.

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Complete Question:

A board of wood measures 61.6 cm as that length is expressed in meters

The angle between the vectors A and B is 80.46°.

Vector A = 4.3i + 6.9j

Vector B = 5.3i - 2.2j

In general, any magnitude that can be provided with a direction is considered as a vector quantity since vectors are just regular quantities with direction.

Apparently, a scalar quantity is any quantity that is specified without any direction.

The magnitude of A, |A| = √(5.3)²+ (-2.2)²

|A| = √(4.3)²+ (6.9)²

|A| = √(18.49 + 45.54)

|A| = √64.03

|A| = 8.01

The magnitude of B, |B| = √(5.3)²+ (2.2)²

|B| = √(28.09 + 4.84)

|B| = √32.93

|B| = 5.73

A.B = (4.3i + 6.9j).(5.3i - 2.2j)

A.B = (4.3 x 5.3) + (6.9 x -2.2)

A.B = 22.79 - 15.18

A.B = 7.61

The expression for the angle between the vectors A and B is given by,

θ = cos⁻[(A.B)/(|A| |B|)]

θ = cos⁻¹[7.6/(8.01 x 5.73)]

θ = cos⁻¹(7.6/45.89)

θ = cos⁻¹(0.1656)

θ = 80.46°

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A chemical element with the symbol Be and atomic number 4 is known as beryllium. Beryllium is a solid at room temperature and is categorized as an alkaline earth metal. The molar mass of beryllium (atomic number 4) is 9.012 g/mol. Accordingly, if all 6.22x1023 Beryllium atoms were put together in a mole, they would weigh 9.012g on a triple beam balance.

The atomic mass unit serves as the unit of measurement for mass (amu). A mass unit of an atom is 1.66 x 10-24 gram. The mass of one nucleon, which can be either a single proton or neutron, is roughly equal to one unified atomic mass unit, which is numerically equivalent to 1 g/mol.

In the aircraft industry in particular, beryllium is employed in gears and cogs. A silvery-white metal is beryllium. It has a low density and is relatively soft. Gyroscopes, springs, electrical contacts, spot-welding electrodes, and non-sparking tools all use beryllium in alloys with copper or nickel.

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the screen is moved further away from the slits in a two slit interference experiment using light of wavelength 500 nm, the fringe pattern on the screen will become wider and the distance between the fringes will increase. This is because the distance between the slits and the screen has a direct effect on the diffraction pattern.

As the screen is moved further away, the diffraction pattern spreads out, causing the fringes to become wider and more spread apart. Additionally, the intensity of the fringes will decrease as the distance from the slits increases. When the screen is moved further away from the slits while using light of wavelength 500 nm, the fringe pattern observed on the screen will experience an increase in fringe spacing.


In a two-slit interference experiment, light passes through two narrow slits, creating an interference pattern on a screen placed behind the slits. the fringe pattern is a result of constructive and destructive interference of the light waves, which depends on the wavelength of the light and the distance between the slits.The fringe spacing (the distance between adjacent bright fringes) can be calculated using the formula: fringe spacing = (wavelength × distance to the screen) / slit separation.

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The most amount of work is done in  Slowing down from 200 km/hr to 180 km/hr.

A force must be applied in order for work to be completed, and there must also be motion or displacement in the force's direction. The amount of force multiplied by the distance moved in the force's direction is known as the work done by a force acting on an item. Work has no direction and only magnitude. Work is a scalar quantity as a result.

Let the mass of the car be m.

Then work done in slowing down from 70 km/hr to rest = 1/2×m×70² = 4900m/2.

work done in slowing down from 100 km/hr to 70 km/hr =  1/2×m×(100² - 70²) = 5100 m/2.

work done in slowing down  from 200 km/hr to 180 km/hr = 1/2×m×(180² - 100²) = 22400m/2.

Hence, the most amount of work is done in  Slowing down from 200 km/hr to 180 km/hr.

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Given, Radius of Cork ball, r = 2 cm Density of Cork ball, ρc = 1/5 ρw We know, If a solid that is lighter than a fluid is placed in the fluid, the solid will be immersed to such a depth that the weight of the solid is equal to the weight of the displaced fluid.

i.e,  ρc Vc g = ρw Vw g ρc /ρw = Vw / Vc From this we can conclude that the volume of displaced fluid is equal to the volume of the immersed object. Vw = Vc = (4/3)πr³ Volume of Cork Ball Substituting the given values

ρc/ρw = 1/5  

=>  ρw = 5ρcVc = (4/3)πr³  

=>  Vc = (4/3)π(2)³ = 32/3 π cm³Vw

= Vc => Vw = 32/3 π cm³

Now, the equation we have is,ρc Vc = ρw(πx²r - 3πx³ /3) => ρc/ρw (4/3)πr³ = πx²r - πx³= 4/3 r²x - x³/3

Using secant method to an accuracy of 3 sig figs,

F(xn-1) = 4/3 r²xn-1 - xn-1³/3

F(xn) = 4/3 r²xn - xn³/3F(xn-1) - F(xn) / (xn-1 - xn) =

f(x) = 4/3 r²x - x³/3x1 = 0.1 cm and x2 = 0.2 cm

F(x1) = 4/3 (2)²(0.1) - (0.1)³/3 = 0.03407

F(x2) = 4/3 (2)²(0.2) - (0.2)³/3 = -0.08226x2 - x1 = 0.1

F(x2) - F(x1) = -0.11633x3 = 0.2 - 0.08226/(-0.11633)

= 0.8546F(x3) = 4/3 (2)²(0.8546) - (0.8546)³/3

= -0.0000171 cm.

Therefore, the floating depth of the cork ball is 0.855 cm (approx).

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As the electric current through a wire increases, the magnetic field around the wire becomes stronger. (A)

(That's the reason why, if you want to use your junk-yard electromagnet to lift junk cars, you have to run a huge current through it.)

The kangaroo's horizontal speed will be 9.7 m/s and its departure speed will indeed be 10.65 m/s.

By observing the pace at which this compressed region moves through the medium, we may determine the sound speed. The sound wave travels at a speed of around 343 meters per second in low humidity at 20 degrees Celsius.

The following equation relates the distance to the direction and initial velocity:

d = [v₀²sin2θ]/g, where θ – the angle of the jump.

Thus, v₀² = gd / (sin2θ) = (9.8×8)/0.69 = 113.62

v₀ = 10.65 m/s ( the take off speed).

The horizontal velocity equals:

vₓ = v₀cos 22° = 10.65 m/s × 0.92 = 9.7 m/s

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Answer:

centripetal acceleration formula

a = v²/r

v velocity

r radius

a= .5²/7

a = .25/7

a= .03571

ans .o3571

Answer:

A

Explanation:

Answer:

There are actually three, Kepler's laws that is, of planetary motion: 1) every planet's orbit is an ellipse with the Sun at a focus; 2) a line joining the Sun and a planet sweeps out equal areas in equal times; and 3) the square of a planet's orbital period is proportional to the cube of the semi-major axis of its

The slowest speed the rider can have at the top of the loop to avoid falling is 12.0 m/s.

The rider will be at the top of the loop when the normal force of the track provides the centripetal force needed to keep the rider moving in a circular path. At the top of the loop, the normal force will be equal to the weight of the rider, N = mg, where m is the mass and g is acceleration due to gravity.

The centripetal force needed to keep the rider moving in a circular path is provided by the normal force, N = mv²/r, where m is the mass and v is the velocity, r is the radius.

Setting these two expressions equal to each other and solving for the speed v:

mg = mv²/r

v² = gr

v = √(gr)

where g is the acceleration due to gravity.

Plugging in the given radius of the loop, we get:

v = √(9.8 m/s² * 18.0 m)

= 12.0 m/s

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Answer:

Originally Answered: What is the unit of measurement of pressure in the atmosphere? The SI derived unit of pressure is the pascal , abbreviated Pa. This is a pressure exerted by a force of 1 newton acting over an area of 1m².

Explanation:

Hope this helps you a lot my boo!

Answer:

Explanation:

Comment

This depends on your grade level. Because there are only two choices needed, I would say the answer is

But recognize that when something burns, it is because of a change in chemical structure. For example CH4 + 2O2 ===> CO2 + 2H2O

Movement in the example is not as important as what is going on with the Methane Combined with the oxygen.

Answer:potential energy or kinetic energy.

Explanation: potential energy is the energy of position or condition, while kinetic energy is the energy of motion. Both forms of energy are important in understanding and analyzing the behavior and transformations of energy in various systems.

The electrostatic force on Q3 by Q1 is -1.99 N and the force from Q2 is -36.2  × 10⁹ N.. Then the net electric  force acting on A is 5.8 × 10⁻⁵ N.

According to Coulomb's law of force, the electrostatic force between two charges separated by a distance of r is given as follows:

Fc = Ke q1 q2 /r²

where Ke = 8.9 × 10⁹ Nm²/C²

Given the charge of  Q1 = -1.21 ×10⁻⁶ C

charge of Q3 = 148 ×10⁻⁶   C

distance r =  0.447 + 0.447 =0.894 m

then Fc =  8.9 × 10⁹ Nm²/C²  (-1.21 ×10⁻⁶ C ) (148 ×10⁻⁶C)/(0. 894 m)² = -1.99 N

Similarly, the force on A by the charge C is calculated as follows:

distance to C = 0.447 m

charge of Q2 = -55 H C = -5500 C

Then Fc =   8.9 × 10⁹ Nm²/C²  (-5500 C ) (148 ×10⁻⁶C)/(0.447 m)² = - 36.2 × 10⁹ N

The net electric force acting on Q3 =  - 36.2× 10⁹ N + -1.99 N = -38.9 × 10⁹ N.

Therefore, the net electric force acting on Q3 is  -38.9 × 10⁹ N.

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The current in the circuit is  ≈ 2.07 amperes (A)

A current circuit is a closed path through which electric current can flow. It typically consists of a power source, such as a battery or generator, a load, such as a light bulb or motor, and conductive wires or other components that connect the power source and load to form a complete path for the current to flow.

The current in the circuit can be calculated using the formula:

current = charge / time

In this case, the charge moved around the circuit is 60 coulombs and the time taken is 29 seconds. Thus, the current in the circuit is:

current = 60 coulombs / 29 seconds

current ≈ 2.07 amperes (A)

Therefore, The current in the circuit is  ≈ 2.07 amperes (A)

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Answer: B) Cell phones. :)

Cell phone relies on the ability of ionic compounds to conduct electricity.

Ionic compounds are crystalline solids formed by neatly packed ions with opposite charges. Metals and nonmetals typically react to form ionic compounds.

In other words, ionic compounds are ionic compounds because they are held together by ionic bonds. Elements can gain or lose electrons to achieve their closest noble gas configuration. The formation of ions for the completion of the octet (either by gaining or losing electrons) aids in their stability.

The movement of the lithium ions in the anode generates free electrons, which generates a charge at the positive current collector. The electrical current then flows from the current collector to the negative current collector via a powered device (cell phone, computer, etc.).

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The magnitude of the force on the charge by the influence of the magnetic field will be 6.6*10^-3 N

Magnetic force, attraction or repulsion that arises between electrically charged particles because of their motion.The magnitude of the magnetic force acting on the charge is given by:

\(\rm F=qvBsin\theta\)

where

The magnitude of the charge   \(q=5.7\ \mu C =5.7\times 10^{-6} \ C\)

The velocity of the charge        \(v=4.5\times 10^5\ \frac{m}{s}\)

The magnitude of the magnetic field   \(3.2\ mT=0.0032\ T\)

The angle between the directions of v and B  \(\theta =90^o-37^o=53^o\)

By substituting the values we will get:

\(F=(5.7\times 10^}-6})(4.5\times 10^5)(0.0032)(Sin53^o)\)

\(F=6.6\times 10^{-3}\ N\)

Hence the magnitude of the force on the charge by the influence of the magnetic field will be 6.6*10^-3 N

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Answer:

a - on edge

Explanation:

yes

Answer:

Many objects are designed specifically to store elastic potential energy, for example: The coil spring of a wind-up clock. An archer's stretched bow. A bent diving board, just before a divers jump

Explanation:

Answer:

Elastic Potential Energy is stored in elastic items.

A example of Elastic Potential Energy is a rubber band. When you stretch it, and it shoots off your finger. Where the rubber band gives off Elastic Potential Energy, is when you stretch it on your fingers, before you let it go.

Answer:

yes.................

The ratio of the velocities of the two planets is 0.482

The velocity v of the planet in its circular orbit can be calculated using the following formula: v = 2πr/T

So, v = 2πr/ T

Where T is the time period of revolution of the planet around the star, r is the radius of the circular orbit, and v is the velocity of the planet in its orbit.

Since we can assume circular orbits, we have v ∝ r^-1/2.

Therefore, the ratio of velocities of the two planets is given as follows:

V1 / V2 = (r1 / r2)^(1/2)

Where, V1 is the velocity of the terrestrial planet orbiting at 5.00 AU, r1 is the radius of the orbit of the terrestrial planet around the star, V2 is the velocity of the giant planet orbiting at 19.00 AU, and r2 is the radius of the orbit of the giant planet around the star.

Therefore, substituting r1 = 5.00 AU, r2 = 19.00 AU, we get the ratio of the velocities of the two planets as:

V1 / V2 = (5/19)^(1/2)

V1 / V2 = 0.482

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Answer:

d//

Explanation:

there is a total fat content of 8 grams

Answer:

D

Explanation:

Answer:

The answer should be C. some mass was consumed in the reaction

A powder and a liquid with a total mass of 20 grams are combined in an open beaker, then the best explanation for the difference in mass is that some mass was consumed in the reaction. Hence, option C is correct.

A chemical reaction is the process by which any or more compounds, known as reagents, change into one or more new ones, known as products. Active ingredients or compounds make up substances. The atoms that make up the reactants are reorganized in a chemical reaction to create various products.

Technology, society, and even life itself depend on chemical interactions in one way or the other and. Chemical reactions have been recognized and employed for thousands of years in a wide variety of activities, including burning fuels, smelting iron, creating pottery and pottery, brewing beer, making wine, and manufacturing cheese. There are countless examples of complicated chemical reactions in all living systems, as well as in the Earth's geology, atmosphere, and oceans.

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Answer:

46°C

Explanation:

q = mCΔT

336,000 J = (20 kg) (4200 J/kg/°C) (50°C − T)

T = 46°C

Becky takes a shower, and he uses 20,000 g of water with specific heat of 4200 J/kg then the starting temperature of the water will be equal to 46 °C.

Specific heat is the amount of energy needed to raise a product's temperature by one degree Celsius per gram. Traditionally, the units of heat capacity are calorie or joules per gram per degree Celsius. The specific heat of water, for instance, is 1 calorie (or 4.186 joules) per gram per degree Celsius.

In the 18th century, the Scottish scientist Joseph Black noted that equivalent masses of various substances required varying quantities of heat to increase them across the same ambient temperature. Based on this discovery, he developed the theory of specific heat.

From the given data in the question,

q = mCΔT

Here ΔT is the change in the temperature.

336,000 J = (20 kg) × (4200) × (50 °C − T)

T = 46 °C

Therefore, the starting temperature of the water is 46 °C.

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Answer:

The change on the Celsius scale is 27.22 °C.

Explanation:

The conversion of Fahrenheit to Celsius is the following:

\(T = \frac{5}{9}(^{\circ} F - 32)\)

So, we need to convert T₁ and T₂ from °F to °C:

\(T_{1} = \frac{5}{9}(^{\circ} F - 32) = \frac{5}{9}(- 4 - 32) = -20 ^{\circ} C\)

\(T_{2} = \frac{5}{9}(^{\circ} F - 32) = \frac{5}{9}(45 - 32) = 7.22 ^{\circ} C\)

Hence, the change on the Celsius scale is:

\( \Delta T = T_{2} - T_{1} = 7.22 - (-20) = 27.22 ^{\circ} C \)

Therefore, the change on the Celsius scale is 27.22 °C.

I hope it helps you!