How did Rutherford change the model of the atom?

A.
He used an experiment with gold foil to prove that an atom had a positive nucleus in the middle and was surrounded by negative electrons.

B.
He used thought problems to determine that matter could be divided into smaller pieces until it got to the atomic level.

C.
He used an experiment with Cathode Ray tubes to prove electrons existed when they changed the color of a gas.

D.
He used various experiments to prove that atoms of the same element have the same mass.

Answers

Answer 1
A.) He used an experiment with gold foil to prove that an atom had a positive nucleus in the middle and was surrounded by negative electrons.

Hope this helps!

Related Questions

A car travels around a racetrack at aconstant speed. During what parts of the coursedoes the car experience acceleration?

Answers

At any part where it is moving in a circle or even part of a circle (centripetal acceleration) 

Answer:

If the racetrack’s length is 36 inches and is set to a height of 8 inches, 16 inches and 24 inches and each roll of the toy car is 7.8 seconds, 7.3 seconds and 6.6 seconds respectively, then, it only shows that the higher the racetrack, the faster the toy car will roll down because velocity, which measures how fast something is moving, is affected by gravity. Motion, as shown in this kind of scenario, is a kind of concept that depicts movement or change in position under given circumstances or factors over a period of time.

Explanation:

Classify which is specific defense or nonspecific defense:

- skin
- macrophages
- bacteria
- mucous
- fever
- B cells
- T cells
- antibodies

Answers

Non-specific: skin, mucous, macrophages, fever
Specific: B cells, T cells, antibodies

The theory of plate tectonics developed in part from an earlier hypothesis about how continents move. What is the name of this earlier hypothesis?

A.
continental drift
B.
earthquake development
C.
natural selection
D.
evolution


Answers

I think it maybe A. Continental Drift

its A i know my science

what units is length in

Answers

Some units of length are: meters, centimeters, kilometers, etc...
Sisteme International recognises only meters.
In physics calculations we use only meters.

However, there are also multimeters, kilometres, ft, miles

A hydraulic press for compacting powdered samples has a large cylinder which is 10.0 cm in diameter, and a small cylinder with a diameter of 2.0 cm. A lever is attached to the small cylinder as shown in The sample, which is placed on the large cylinder, has an area of 4.0 cm2.
What is the pressure on the sample if F = 270 N is applied to the lever?

Answers


F small cylinder = 2.F
2.F/s = p = (F sample/S)
p sample = F sample/S sample
▬▬▬
> p sample = 2.F.S/s/S sample = 2.F.(D/d)²/S sample
> p sample = 2*280*(10/2)^2/4E-4 = 3,50E+07 u.S.I.
> p sample = 35,0 MPa = 345 atm

The hydraulic pressure on sample is [tex]3.35*10^{7} N/m^{2}[/tex].

What is hydraulic pressure?

Hydraulic pressure is the force imparted per unit area of a liquid on the surfaces which it has contact.

The magnitude of force acting on the small cylinder is equal to [tex]F_{N}[/tex].

In static equilibrium, all the torques should add up to zero:[tex]F_{N}l - 270(2l)= 0\\F_{N} = 270(2)\\F_{N} = 540 N[/tex]

The pressure applied to the fluid (through the small cylinder):

[tex]P= \frac{540}{\pi (\frac{2*10^{-2} }{2} )^2}[/tex]

[tex]P = 1.71*10^{6} Pa[/tex]

The force of fluid on the large cylinder:

[tex]F= P\pi R^{3} \\F= 1.71*10^{6} \pi (0.05^{2} )\\F= 1.34*10^{4} N[/tex]

The pressure on the sample:

[tex]P_{S} =\frac{F}{A} \\P_{S}= \frac{1.34*10^{4} }{4*10^{-4} } \\P_{S}= 3.35*10^{7} N/m^{2}[/tex]

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The efficiency of a screw is low because of _____.



width

friction

length

height

Answers

The correct answer that would best complete the given statement above would be the second option. A screw is an inclined plane wrapped around a cylinder. The efficiency of a screw is low because there is more input than output. In other words, it is because of friction. Hope this answer helps.

Answer:

The efficiency of a screw is low because of friction.

Explanation:

A screw is a simple machine that is used to convert a torque to linear force and rotational motion to linear motion. The efficiency of a screw is given by :

[tex]\eta=\dfrac{Fl}{2\pi T}[/tex]

Where

l = pitch distance in mm

T = torque in N-m

The efficiency of screw is less because the output is less as compared to input or there is more input than output. This implies that there is more friction.

Hence, the correct option is (b) "friction".

An object is dropped from a 400-ft tower.

a) when does it hit the ground?

b) how fast is it going at the time of impact?

Answers

we know that k = 400 

vt = -32t ;  dt = 400 - 16t^2

0 = 400 - 16t^2

when it hit the ground

0 = 400 - 16t^2

t = +/- 5s

so , 
a = 5 s
b = 160 ft/s

Hope this helps

So,a)It will hit ground at 4.52seconds.b)At 145 ft/s fast is it going at the time of impact

An object is dropped from a 400-ft tower:

a) When does it hit the ground? Using the formula: time = [tex]\sqrt[1]{2*height/g}[/tex], where g is the acceleration due to gravity (32 ft/s²), the time taken to hit the ground is approximately 4.52 seconds.

b) How fast is it going at the time of impact? The velocity of the object when it hits the ground can be calculated as velocity = g * time, which gives a velocity of about 145 ft/s.

Shawn runs 4 times around a 400 meter oval track and stops at the same point he sstarted

Answers

What are you asking for? There needs to be more info.

Why is the combination of two protons and two neutrons stable, but two protons and one neutron is not?

Answers

Because it's unbalanced.

Answer:

There are not enough neutrons to overcome the electrical repulsion of the protons.

Explanation:

Neutrons help stabilize a nucleus by attracting other nucleons (protons and neutrons). Although protons also attract other nucleons using the strong nuclear force, they repel other protons with the electrical force.

Hope this helps!

An archer pulls back the string of a bow to release an arrow at a target. Which kind of potential energy is transformed to cause the motion of the arrow?

Answers

The correct answer should be elastic.

Answer: elastic potential energy

Explanation:

The form of energy stored in the string of the bow is elastic potential energy. Elastic potential energy is the energy stored in an elastic object (such as the string of a bow) when the object is compressed/stretched by a certain amount x with respect to its natural length. The elastic potential energy stored in the object is given by

[tex]U=\frac{1}{2}kx^2[/tex]

where k is the spring constant of the elastic string, and x is the compression/stretching.

What is the the steadiest firing position?

Answers

The closer you are to the ground the more accurate you'll be.  That's why most snipers are in the "prone" position. 

Which of the following statements is true?

-the freezing and boiling temperatures of a substance are the same.
-the freezing and condensation temperatures of a substance are the same.
-the freezing and melting temperatures of a substance are the same.
-the freezing, melting, and boiling temperatures of a substance are the same.

Please help!!

Answers

Correct answer choice is :


C) The freezing and melting temperatures of a substance are the same.


Explanation:


Fluids have a particular temperature at which they convert into solids, identified as their freezing point. In theory, the melting point of a solid should be the same as the freezing point of the liquid. In practice, small variations among these measures can be seen. The freezing point of a matter is the same as that substance's melting point. At this distinct temperature, the substance can exist as either a solid or a liquid. At temperatures below the freezing/ melting point, the substance is a solid.


Answer: The correct answer is "The freezing and melting temperatures of a substance are the same".

Explanation:

Freezing temperature: It is the temperature at which the liquid becomes the solid.

Melting temperature: It is the temperature at which the solid starts converted into liquid.

The freezing point of a substance is the same as the melting point of the substance. During melting and freezing of the substance, the temperature remains same as the energy is spent in changing the phase of the substance not in changing the temperature.

Latent heat is there. It is a hidden heat. It is required to change phase of the substance without showing temperature on thermometer.

Boiling temperature: It is the temperature at which liquid gets converted into vapors. At this temperature, vapor pressure of the liquid equals to the pressure surrounding the liquid.

Which of the following best defines volume?
A. The amount of matter in a substance.
B. The shape of a sample of matter.
C. The amount of space that a sample of matter takes up.
D. The way that a substances atoms are arranged Which of the following best defines volume?
A. The amount of matter in a substance.
B. The shape of a sample of matter.
C. The amount of space that a sample of matter takes up.
D. The way that a substances atoms are arranged

Answers

Answer:

C. The amount of space that a sample of matter takes up.

Explanation:

Volume is defined as the 3 dimension shape which is enclosed by a closed surface. It is defined that the space which is occupied by the substance.

The volume is defined in the cubic units.

The volume of container generally is the classification of the amount of space which the substance hold rather than the space which is displaced by the container itself.

Final answer:

Volume is the amount of space that a sample of matter takes up.

Explanation:

Volume is best defined as the amount of space that a sample of matter takes up. It is a measure of how much space an object occupies. Volume can be expressed in different units such as cubic meters, liters, or milliliters.

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based on the law of conservation of energy. how can we reasonably improve a machines ability to do work? A.move the machine to a different gravitational field B.increase the friction between its moving parts C. reduce the friction between its moving parts or D. redefine the machines system boundaries?

Answers

The correct answer is

C. reduce the friction between its moving parts


In fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.

Answer: We can reasonably improve a machines ability to do work by reducing the friction between the moving parts of machine. The correct answer is C.

Explanation:

According to the law of conservation of energy, the energy can neither be created nor destroyed. The energy can be converted from one form to another.

The energy is wasted due to the friction. It reduces the efficiency of the machines to do the work. There will be energy loss due to the friction. By reducing the friction, More energy can be converted into the work.

Therefore, we can reasonably improve a machines ability to do work by reducing the friction between the moving parts of machine.

Which of the following best describes the difference between speed and acceleration? A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing.

 B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

 C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.

 D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an objectWhich of the following best describes the difference between speed and acceleration?  A. Acceleration is the distance an object travels within a specific unit of time, whereas speed is the rate at which the acceleration or direction of an object is changing.
  B. Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.
  C. Acceleration is the distance an object travels within a specific unit of time, whereas speed is a measure of the force necessary to change the acceleration of an object.
  D. Speed is the distance an object travels within a specific unit of time, whereas acceleration is a measure of the force necessary to change the speed of an object.

Answers

Answer:

Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

(Apex) Pretest

The option that best describes the difference between speed and acceleration is : ( B ) Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

Difference between and Acceleration and Speed

Acceleration is the rate of change of velocity with time while speed is the rate of change distance with time.

Acceleration is a vector quantity because it has magnitude and direction while speed is a scalar quantity.

Hence we conclude that Speed is the distance an object travels within a specific unit of time, whereas acceleration is the rate at which the speed or direction of an object is changing.

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The radii of the sprocket assemblies and the wheel of the bicycle in the figure are:
4 inches,
2 inches,
and 14 inches respectively.

If the cyclist is pedaling at a rate of 1 revolution per second, find the speed of the bicycle in (a) feet per second and (b) miles per hour.

Answers

Final answer:

To find the speed of the bicycle, we can consider the gearing ratio between the sprocket assemblies and the wheel. The speed in feet per second can be calculated using the cyclist's pedalling rate and the circumference of the wheel. We can use conversion factors to convert the speed to miles per hour.

Explanation:

In order to find the speed of the bicycle, we need to consider the gearing ratio between the sprocket assemblies and the wheel. The ratio of the radii of the sprocket assemblies and the wheel can be used to determine the wheel's rotational speed.

Let's say the cyclist is pedaling at a rate of 1 revolution per second on the sprocket assembly with a radius of 4 inches. The sprocket assembly is connected to another sprocket assembly with a radius of 2 inches, which is then connected to the wheel with a radius of 14 inches.

The ratio of the radii between the sprocket assembly and the wheel is 14/2 = 7.

Therefore, the speed of the bicycle in feet per second can be calculated by multiplying the cyclist's pedalling rate by the circumference of the wheel:

Speed (feet per second) = 1 revolution/second x 2π x 14 inches = 28π inches/second = 28π/12 feet/second

To find the speed of the bicycle in miles per hour, we can convert the speed from feet per second to miles per hour:

1 mile = 5280 feet and 1 hour = 3600 seconds, so:

Speed (miles per hour) = (28π/12 feet/second) x (5280 feet/1 mile) x (1 hour/3600 seconds)

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A falling skydiver has a mass of 105 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-half of his weight?

Answers

f-free = m*g - F_air = m*a

F_air = 1.2 * m

a= (105 kg * 9.8 m.s^2 - 5*105) / 105 kg

a = 9.3 m/s

Hope this helps
Final answer:

The magnitude of the skydiver's acceleration when the upward force of air resistance is half of his weight is 4.9 m/s² downward. This is found using Newton's Second Law and the skydiver's weight calculated from his mass and the acceleration due to gravity.

Explanation:

When the upward force of air resistance is equal to one-half of the skydiver's weight, the net force on the skydiver is only half of his weight acting downward. The skydiver's weight (W) can be calculated using the equation W = mg, where m is the mass and g is the acceleration due to gravity. For a mass (m) of 105 kg and assuming the acceleration due to gravity (g) is approximately 9.8 m/s2, the skydiver's weight would be 105 kg × 9.8 m/s2 = 1029 N. Half of this weight is 1029 N / 2 = 514.5 N.

According to Newton's Second Law (F = ma), the net force is equal to the mass multiplied by the acceleration. In this case, the net force is also the unbalanced force acting on the skydiver, which is half the skydiver's weight. Therefore, we have F = ma, which means 514.5 N = 105 kg × a. Solving for a, the acceleration, we get a = 514.5 N / 105 kg which is approximately 4.9 m/s2. Therefore, the magnitude of the skydiver's acceleration in this case is 4.9 m/s2 downward.

Can someone please help me how to set this up?

A police car receives a radio call to catch a vehicle which is speeding down the highway at 80 mph. The police car, which is 12 miles away, drives after it at 108 mph. How long will it take for the police car to catch up? ...?

Answers

The car has a 12 mile head start, going 80 mph, so his distance is:dcar=80∗t+12
The is going at 108 mph, so his distance is:dcop=108t
Setting them equal to each other we get:80t+12=108t⇒12=28t⇒t=1228=37
So 3/7 of an hour.about 25.7 mins.

Answer:

The time is 0.428 hr.

Explanation:

Given that,

Final speed = 108 mph

Initial speed = 80 mph

Distance = 12 miles

We need to calculate the time

Using formula of time

[tex]v = \dfrac{d}{t}[/tex]

d = distance

t = time

Put the value into the formula

[tex]108-80=\dfrac{12}{t}[/tex]

[tex]t = \dfrac{12}{108-80}[/tex]

[tex]t =0.428\ hr[/tex]

Hence, The time is 0.428 hr.

if i jump on a trampoline. is it an inelastic or elastic collision?

Answers

Inelastic Collision :P
it would be an inelastic collision.

hope this helps you.

you did 150 joules of work lifting a 120 -N backpack.
how high did you lift the backpack?
how much did the backpack weigh in pounds

Answers

you did 150.j of work lifting a 120.N back

The backpack was lifted 1.25 meters high, and it weighed approximately 26.977 pounds.

To determine how high you lifted the backpack, we can use the formula for work done against gravity, which is W = F × h, where W is work (in joules), F is force (in newtons), and h is height (in meters). Since you did 150 joules of work to lift a 120-N backpack, we can rearrange the formula to solve for height (h): h = W / F = 150 J / 120 N = 1.25 meters. You lifted the backpack 1.25 meters high.

To find out how much the backpack weighed in pounds, we use the conversion factor that 1 newton is approximately equal to 0.224809 pounds. Therefore, 120 N × 0.224809 lb/N = 26.977 pounds. The backpack weighed approximately 26.977 pounds.

what two kinds of motion combine to to produce projectile motion

Answers

Horizontal and Vertical.

A rock is dropped from a bridge. what happens to the magnitude of the acceleration and the speed of the rock as it falls?

Answers

Magnitude of acceleration is downwards to the earth.
Speed will increase from 0...
Each second speed will grow up for 9.8 ms-1
From the moment the rock is released until the moment it plops into
the rapids below, its acceleration is constant.  The magnitude of the
acceleration is unique to the planet on which the rock is dropped,
and points toward the center of the planet.  On Earth, the magnitude
is about 9.81 m/s² .

Since the size of the acceleration is not zero, that tells us right away
that the speed of the rock grows steadily as it falls.

Which of the following is the correct unit for force?
A. Watts
B. Joules
C. Meters
D. Newton

Answers

Newton is the correct unit of force

A brass washer has an outside diameter of 4.50 cm with a hole of diameter 1.25 cm and is 1.50 mm thick. The density of brass is 8599 kg/m3. If you put this washer on a laboratory balance, what will it "weigh" in grams?

Answers

Final answer:

The weight of the brass washer is 82.3 grams.

Explanation:

The weight of the brass washer can be calculated using its density and volume. The volume of the washer can be found by subtracting the volume of the hole from the volume of the outer cylinder. The formula for the volume of a cylinder is πr^2h, where r is the radius and h is the height.

Given that the outside diameter is 4.50 cm, the radius is half of that, which is 2.25 cm (or 0.0225 m). The height of the washer is 1.50 mm, which is 0.0015 m. Using these values, we can calculate the volume of the washer:

Volume = π(0.0225)^2(0.0015) = 9.5747 x 10^-6 m^3

Now, we can calculate the weight of the washer using its volume and density:

Weight = Volume x Density = 9.5747 x 10^-6 m^3 x 8599 kg/m^3 = 82.3 g

Final answer:

The weight of the brass washer on a laboratory balance would be 59.5 grams.

Explanation:

To find the weight of the brass washer, we need to calculate its volume and then multiply it by the density of brass. The volume of the washer can be found by subtracting the volume of the hole from the volume of the outside part of the washer.

The volume of the outside part of the washer can be calculated using the formula for the volume of a cylinder: V = π[tex]r^2[/tex]h. In this case, the radius (r) is half the outside diameter, so r = 4.50 cm / 2 = 2.25 cm = 0.0225 m. The height (h) is the thickness of the washer, which is 1.50 mm = 0.0015 m. Plugging these values into the formula gives us V = π(0.0225 [tex]m^2[/tex](0.0015 m) = 7.21 x [tex]10^{-6}[/tex] [tex]m^3[/tex].

The volume of the hole can also be found using the formula for the volume of a cylinder, since it is cylindrical in shape. The radius (r) of the hole is half the hole diameter, so r = 1.25 cm / 2 = 0.0125 m. The height (h) of the hole is the same as the thickness of the washer, which is 0.0015 m. Plugging these values into the formula gives us V = π(0.0125 [tex]m^2[/tex](0.0015 m) = 2.94 x [tex]10^{-7}[/tex] [tex]m^3[/tex].

Now, we can find the volume of the washer by subtracting the volume of the hole from the volume of the outside part: V_washer = 7.21 x [tex]10^{-6} m^3[/tex] - 2.94 x [tex]10^{-7} m^3[/tex] = 6.92 x [tex]10^{-6} m^3[/tex].

Finally, we can calculate the weight of the washer using the formula W = V_washer * density. Plugging in the values gives us W = 6.92 x [tex]10^{-6} m^3[/tex] * 8599 kg/[tex]m^3[/tex] = 5.95 x [tex]10^{-2}[/tex] kg = 59.5 g.

How much work is done when a 48-kg stack of books are lifted 2m with a net force of 25 N ?
A. 12.4 J
B. 100 J
C. 50 J
D. 96 J ...?

Answers

Work = force x displacement
W = 25 x 2
W= 50 J

Answer:

C). W = 50 J

Explanation:

As we know that the work done is the product of force and displacement

so here it is given that the net force on the stack of books is 25 N

[tex]F = 25 N[/tex]

also the displacement of the stack of books is 2m as it is lifted upwards

so we have

[tex]d = 2 m[/tex]

now by the formula of work done we know

[tex]W = F.d[/tex]

now plug in all values in it

[tex]W = (25)(2)[/tex]

[tex]W = 50 J[/tex]

a projectile is fired with an initial speed of 500m/s and angle of elevation 30 degrees. find the range, max height and speed at impact

Answers

Vt =  Voy - at
Vt = initial speed x sin 30 - 10t

0 =  500 sin30 - 10t
0 =  250√3 - 10t
t = 25 √3

hope this helps
Final answer:

To find the range, maximum height, and speed at impact of a projectile fired with an initial speed of 500m/s and angle of elevation 30 degrees, we can use the equations of projectile motion.

Explanation:

To find the range, maximum height, and speed at impact of a projectile fired with an initial speed of 500m/s and angle of elevation 30 degrees, we can use the equations of projectile motion.

Range: The horizontal distance covered by the projectile is the range. In this case, we can use the formula:

R = (V02 * sin(2θ)) / g

where R is the range, V0 is the initial speed, θ is the angle of elevation, and g is the acceleration due to gravity.

Substituting the given values into the formula, we have:

R = (5002 * sin(2 * 30)) / 9.8

R = (250000 * sin(60)) / 9.8

R ≈ 1450.83 meters

Maximum Height: The maximum height reached by the projectile can be found using the formula:

H = (V02 * sin2(θ)) / (2 * g)

Substituting the given values into the formula:

H = (5002 * sin2(30)) / (2 * 9.8)

H ≈ 3060.45 meters

Speed at Impact: The speed at impact is the magnitude of the velocity of the projectile when it hits the ground. Since the projectile is fired at an angle and lands at a lower height than its initial position, the speed at impact will be lower than the initial speed. However, we need more information to calculate the exact speed at impact.

If two objects are traveling at the same speed, why might one object have more inertia than another object? Give an example of two objects for which this is true?

Answers

probably because it has a bigger mass or shape. hope this HELPS!!!

Answer:

The object has larger mass. Examples would be like-cars of a different build driving at the same mph, or animals that typically run at the same speed but have different weights.

Explanation:

The more inertia that an object has, the more mass that it has.

Which best describes the difference between internal and thermal energy?

Answers

Internal energy cannot be transferred whereas, thermal energy is the energy due to temperature difference

Internal energy is the total potential and kinetic energies in a substance, and thermal energy is the part of internal energy that can be transferred to another substance. The answer on edge would be C.

A VW Beetle goes from 0 to 60.0 mi/h with an acceleration of +2.35 m/s^2. (a) How much time does it take for the beetle to reach this speed? (b) A top-fuel dragster can go from 0 to 30 mi/h in 0.600 s. Find the acceleration (in m/s^2) of the dragster?

Answers

Final answer:

The VW Beetle takes 25.53 seconds to reach a speed of 60.0 mi/h with an acceleration of 2.35 m/s². The top-fuel dragster has an acceleration of 22.36 m/s² to go from 0 to 30 mi/h in 0.600 seconds.

Explanation:

To calculate the time it takes for the VW Beetle to reach a speed of 60.0 mi/h, we need to use the equation v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time taken. Rearranging the equation to solve for t, we have t = (v - u) / a. Plugging in the values, we get t = (60.0 mi/h - 0) / 2.35 m/s² = 25.53 s.

To find the acceleration of the top-fuel dragster, we use the equation a = (v - u) / t, where a is the acceleration, v is the final velocity, u is the initial velocity, and t is the time taken. Rearranging the equation to solve for a, we have a = (v - u) / t. Plugging in the values, we get a = (30 mi/h - 0) / 0.600 s = 50 mi/h/s = 22.36 m/s².

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Does gravity increase or decrease with greater distance?

Answers

Decrease. Gravity is stronger here on earth than on the moon.
Other Questions
Suppose that, from measurements in a microscope, you determine that a certain bacterium covers an area of 1.50 m2. Convert this to square meters. which of the following elements is chemically most similar to chlorine? A) helium b) sodium c) bromine d) hydrogen Is lead poisoning still a problem for young children Which of the following was not a negative effect of the Industrial Revolution? A. pollution B. long hours C. child labor D. profits what is the solution to this equation?ds/dt=cost + sint where s(\pi)=1 Multiply (2 7i)(9 + 5i) 2x + 7y + 3x 4y simplify Amy has 25 ribbons .she bought 4 Ann made the rest herself .1/3 of the ribbons have sparkles how many ribbons have sparkles write an equation in point-slope form for the line through the given point with the given slope.(8,3);m=6a. y+3=6(x-8)b. y-3=6(x-8)c. y-3=6(x+8)d. y+3=6(x+8) What is the answer to 5 + 1 x 10= Using the variable v,d and t, write the correct formula for T. The burden of proof is the responsibility of the audience. answer true false describe how to find the number of $4 train tickets you can buy with $32. MRS. FARLY WANTS TO BUY A PENCIL FOR EACH OF HER 23 STUDENTS. PENCILS COME IN BOXES OF 5 PENCILS EACH. WHAT IS THE LEAST NUMBER OF BOXES SHE MUST BUY TO HAVE A PENCIL FOR EACH STUDENT. A. 2, B3, C4, OR D 5 When a material in the liquid state is vaporized and then condensed to a liquid, the steps in the process are, respectively,? Find the slope of the line tangent to thegraph of ln(xy)-2x=0 when x= -1answer choices.. 1. slope = 3/2e^-2 2. slope= 3/2e^2 3. slope= 3e^-2 4. slope= -3e^2 5. slope= -3/2e^2 6. slope= -3e^-2 why does Lincoln feel the nation is being punished what strategy can I use to solve 6x7 and 3x9? Would powerful nations or weak nations be more likely to follow an isolationist policy? Explain. The child responds to his mothers demand ____ throwing a tantrum.