A boat floats south on the Amazon River at a speed of 6 m/s. The boat and
passengers have a combined mass of 540 kg.

a. What is the momentum of the boat? (Remember, momentum is a vector
quantity.)

b. The passengers paddle backward, reducing the speed to 4 m/s. What was the
impulse applied to the boat by the paddling?

Answer:

This can be used to find out the speed of the returned journey. The equation means speed = returned distance ÷ time.

Explanation:

Answer:

The solution(s) are in order with respect to the attachments

[tex]2.613\:\cdot10^5[/tex] Joules ; 5. Adding the same amount of heat to two different objects will produce the same increase in temperature ; 2. Same speed in both ; 2. A

Explanation:

Diagram 1 ( Liquid Nitrogen ) : So as you can see, we want our units in Joules here, and can therefore multiply the mass of gaseous nitrogen and the latent heat of liquid nitrogen, to cancel the units kg, and receive our solution - in terms of Joules. Let's do it.

q ( energy removed ) = mass of nitrogen [tex]*[/tex] latent heat of liquid nitrogen,

q = 1.3 kg [tex]*[/tex] 2.01 [tex]*[/tex] 10⁵ J / kg = [tex]1.3\:\cdot \:2.01\:\cdot \:\:10^5[/tex] = [tex]10^5\cdot \:2.613[/tex] = [tex]100000\cdot \:2.613[/tex] = [tex]261300[/tex] Joules = [tex]261.3[/tex] kiloJoules = 2.613 [tex]*[/tex] 10⁵Joules is the energy that must be removed

Diagram 2 : The same amount of heat does not necessarily mean the same increase in temperature for two different objects. The increase in temperature depends on the specific heat capacity of the substance. Therefore your solution is 5 ) Adding the same amount of heat to two different objects will produce the same increase in temperature.

Diagram 3 : The temperatures in both glasses are the same, and hence the molecules have the same average speed. Therefore your solution is 2 ) Same speed in both.

Diagram 4 : Glass A has more water molecules, and hence has more thermal energy. Your solution is 2 ) A.

Answer:

Cools ; size

Explanation:

The rate at which magma cools determines the size of the crystals in the new rock. Igneous rocks are formed from the cooling and solidification of molten magma which finds its way to the surface or depth of very low pressure beneath the surface. This place or depth of cooling of magma affects the cooling rate and hence the size of the crystals formed. Igneous rocks formed at depths below the surface have more time to cool and allows more time for Crystal growth and hence produce coarse grained crystal grains called Intrusive igneous rocks which have significantly larger crystals than those formed on the surface which cools rapidly and allowing very little time for crystal growth giving rise to the formation of fine grained crystals and are called extrusive igneous rocks.

Answer:

47 m

Explanation:

Data obtained from the question include the following:

Length of dry leg 1 (L1) = 40 m

Length of dry leg 2 (L2) = 25 m

Length of swimming course (L) =..?

The length of the swimming course can be obtained by using pythagoras theory as shown below:

L² = L1² + L2²

L² = 40² + 25²

L² = 1600 + 625

L² = 2225

Take the square root of both side.

L = √2225

L = 47.1 ≈ 47 m

Therefore, the length of the swimming course is approximately 47 m.

Answer:

C

Explanation:

Answer:

I believe the answer is C.

Explanation:

Answer:

electric potential energy=

[tex]\frac{KQq}{r} [/tex]

so the electric potential energy and distance(r) are inversely proportional.

then, the greatest energy occur in the smallest distance b/n the two balloon.

Answer:

Top Left

Explanation:

The two balloons would create enough friction and energy to separate from each other as two balls of air would push each other from their energy

Answer:

C The number of rides is the independent variable, and the total cost is the dependent variable.

Explanation:

The total cost is the dependent variable, because it depends on the number of rides.  The number of rides is the independent variable; it is the variable that Nia controls.

Changes in pitch are heard when the Doppler effect occurs.

The Doppler effect, also known as the Doppler shift, is a term used to explain changes in frequency caused by moving sources of sound or light with regard to an observer.

The Doppler effect is the apparent change in frequency or wavelength of a wave that is perceived by an observer when the source of the wave or the observer is moving relative to each other.

In the case of sound waves, if the source of the sound is moving towards the observer, the frequency of the sound waves is perceived to be higher, resulting in a higher-pitched sound.

Conversely, if the source of the sound is moving away from the observer, the frequency of the sound waves is perceived to be lower, resulting in a lower-pitched sound.

This effect can be observed in many everyday situations, such as the changing pitch of a siren as an ambulance or police car passes by.

Learn more about doppler's effect here:

https://brainly.com/question/15318474

#SPJ6

Answer:

option A) pitch

Explanation:

2023 :)

Answer:

1. 12 cm

2. 0.133 m

3. 0.03 m

4. Plane mirror

Virtual image

Upright

Behind the mirror

The same size as the object

Concave mirror when the object is located a distance greater than the focal length from the mirror's surface

Real image

Inverted image

In front of the the mirror

Diminished when the object is beyond the center of curvature

Same size as object when the object is placed at the center of curvature

Enlarged when the object is placed between the center of curvature of the mirror and the focus of the mirror

Concave mirror when the object is located a distance less than the focal length from the mirror's surface

Virtual image

Upright image

Behind the the mirror

Enlarged

Convex mirror

Type = Virtual image

Appearance = Upright image

Placement = Behind the mirror

Size = Smaller than the object

Explanation:

1. For plane mirror, since there is no magnification, the virtual image distance from the mirror = object distance from the mirror = 12 cm behind the mirror

2. The height of the object = 0.3 m

The distance of the object from the mirror = 0.4 meters

Height of image formed = 0.1 meter

We have;

[tex]Magnification, \ m = \dfrac{Image \ height }{Object \ height } = \dfrac{Image \ distance \ from \ mirror }{Object\ distance \ from \ mirror }[/tex]

[tex]m = \dfrac{0.1}{0.3 } = \dfrac{Image \ distance \ from \ mirror }{0.4 }[/tex]

Image distance from the mirror = 0.1/0.3×0.4 = 2/15 = 0.133 m

Image distance from the mirror = 0.133 m

3. [tex]m = \dfrac{Image \ height}{0.10 } = \dfrac{0.06 }{0.20 }[/tex]

The image height = 0.06/0.2×0.1 = 3/100 = 0.03 meter

The image height = 0.03 meter

4. Plane mirror

Type = Virtual image

Appearance = Upright image with the left transformed to right

Placement = Behind the mirror

Size = The same size as the object

Concave mirror when the object is located a distance greater than the focal length from the mirror's surface

Type = Real image

Appearance = Inverted image

Placement = In front of the the mirror

Size = Diminished when the object is beyond the center of curvature

Same size as object when the object is placed at the center of curvature

Enlarged when the object is placed between the center of curvature of the mirror and the focus of the mirror

Concave mirror when the object is located a distance less than the focal length from the mirror's surface

Type = Virtual image

Appearance = Upright image

Placement = Behind the the mirror

Size = Enlarged

Convex mirror

Type = Virtual image

Appearance = Upright image

Placement = Behind the mirror

Size = Smaller than the object.

Answer:

1. The mirror is 12 centimeters away from the image. This is a plane mirror with a flat reflecting surface. The distance between the object and the mirror surface is equal to the distance between the mirror surface and the image.

2. hiho=siso

0.1 m0.3 m=si0.4 m

Multiply each side of this equation by 0.4.

0.4×(0.10.3=si0.4)×0.4

si=0.40.3

si = 0.133 m  

3. hiho=siso

hi0.10 m=0.06 m0.02 m

Multiply each side of this equation by 0.10.

0.10×(hi0.10=0.060.20)×0.10

hi=0.0060.20

hi = 0.03 m

4.

 Image Formation

Mirror  Type  Appearance  Placement  Size  

Plane  Virtual Erect (Upright); Appears to have left and right reversed  Behind the mirror; the distance between the mirror and the image is equal to the distance between the mirror and the object  Depends on the size of the mirror and placement of the object  

Concave (when the object is located a distance greater than a focal length from mirror's surface)  Real  Inverted  In front of the mirror Smaller than the object  

Concave (when object is located a distance less than the focal length of the mirror) Virtual  Erect (Upright)  Behind the mirror Enlarged  

Convex Virtual  Erect (Upright)  Behind the mirror  Smaller than the object  

Explanation:

PENN

Answer:

b and d

a, c, e, and f

Explanation:

Ideal gas law:

PV = nRT

Solving for temperature:

T = PV / (nR)

Therefore, temperature is directly proportional to pressure and volume, and inversely proportional to the number of molecules.

T = k PV / N

Let's say that T₀ is the temperature when P = 100 kPa, V = 4 L, and N = 6×10²³.

a) T = k PV / N = T₀

b) T = k (2P) V / N = 2T₀

c) T = k (P/2) (2V) / N = T₀

d) T = k PV / (N/2) = 2T₀

e) T = k P (V/2) / (N/2) = T₀

f) T = k (P/2) V / (N/2) = T₀

b and d have the highest temperature,

a, c, e, and f have the lowest temperature.

Answer:

resultant is a single force that can replace the of a number of forces , equililbrant is a force that is exactly opposite to resultant

Explanation:

Answer:

1.5 u

Explanation:

The range equation is:

R = u² sin(2θ) / g

When u = v, R = 2.25 R.

2.25 R = v² sin(2θ) / g

2.25 u² sin(2θ) / g = v² sin(2θ) / g

2.25 u² = v²

1.5 u = v

Answer:

2. The temperature doubles.

014) 48.6 J

015) 13,700 J

016) 5.94×10⁻²¹ J

Explanation:

PV = nRT

P and n are constant.

nR/P = k

V/T = k

If the volume doubles, the temperature also doubles.

014) The kinetic energy per atom is:

KE = 3/2 kT

KE = 3/2 (1.38×10⁻²³ J/K) (21 + 273) K

KE = 6.09×10⁻²¹ J

The total kinetic energy is:

KE = (6.09×10⁻²¹ J) (7.99×10²¹)

KE = 48.6 J

016) The kinetic energy per atom is:

KE = 3/2 kT

KE = 3/2 (1.38×10⁻²³ J/K) (14 + 273) K

KE = 5.94×10⁻²¹ J

015) The total kinetic energy is:

KE = (5.94×10⁻²¹ J) (3.82 mol) (6.02×10²³ atom/mol)

KE = 13,700 J

Answer:

A. -50 m/s

Explanation:

Given

Velocity of Chairlift = +15m/s

Velocity of Skier = -35m/s

Required

Determine the velocity of the skier relative to the chairlift

Basically, relative velocity is the difference between the two velocities;

Having said that;

Relative velocity of the skier relative to the chairlift = Velocity of the Skier - Velocity of the Chairlift

Relative velocity of the skier relative to the chairlift = -35m/s - (+15m/s)

Open bracket

Relative velocity of the skier relative to the chairlift = -35m/s - 15m/s

Relative velocity of the skier relative to the chairlift = -50

Answer:

C. 110 - 140

Explanation:

Answer:

i think the best answer is c

Answer:

Medulla oblongata is lower part of brain.

Cerebrum and cerebellum are the upper hemispheres of the brain.

Explanation:

Cerebrum is the largest part of the brain and is composed of right and left hemispheres.

Cerebellum is the part of brain that lies inside the cerebellum.

Medulla Oblongata is lowest part of brain stem which is most vital part of the brain.

Thalamus is a small region of the brain located above the brain stem. Its main function is to transmit sensory signals to cerebral cortex.

Brain stem act as relay center connecting the cerebrum and cerebellum to the spinal chord.

Hypothalamus is the mid brain located near the pituitary glands. It is very small region of the brain but it plays an important role in maintaining the body temperature and releasing the hormones.

Answer:

Medulla oblongata: The bottom part of the brainstem helps regulate your breathing, heart rhythms, blood pressure and swallowing.

Explanation:

Answer:

Spurious relationship

Explanation:

In statistics a spurious relationship is a correlated mathematical  relationship of covariation between two variables or more which by themselves have no cause and effect relationship as a result of a coincidence or the existence of a third or confounding factor

The variables have covariation due to their correlation but they don't have a cause and effect relationship

An example of a spurious relationship is the increase in ice cream sales when there is an observed increase in the rate of drowning.

Answer:

Purpose: To observe how an object’s position and velocity change while it is moving with a constant acceleration.

Question: How does an object’s position and velocity change as the object accelerates?

Hypothesis: If the fan speed increases, then the acceleration of the cart increases, because a greater fan speed supplies more energy to move the cart.

Variables:

• Independent variable: fan speed

• Dependent variable: acceleration of the cart

• Controlled variables: mass

Materials:

• Cart with Fan (1 kg)

• CM ruler (1 cm)

• Stop watch (0.0 cm pe sec)

• Flag

Procedure:

1. Use the setup on “Force and Fan Carts” Gizmo.

2. First, put the fan speed on low and no friction surface.

3. Press the start button and record the final time when the cart crosses the finished line. Record on table B.

4. Then, click on the data tab to record the speed data, total distance, average velocity, and acceleration. Record on table A and B.

5. After, observe the position vs. time graph with the speed and line graph toggled. Record on table C.

6. Repeat steps 2-5 on fan speed on medium and high with no friction surface.

7. Next, reset and put fan speed on low.

8. Press start and pause on 4 seconds.

9. On the same trial turn off the fan speed and hit start again.

10. Observe the graph and write observations on table D.

Analysis and Conclusion:

In conclusion, my hypothesis matches the data, because the data shows that increasing the fan speed increases the acceleration of the cart. The trends for all fan speeds are linear slope for speed. The higher the fan speed, the less time it took for the cart to cross the finish line.

Data:

Explanation:

Sorry can’t copy and paste results

Answer:

for that pervious answer why cant we copy and paste?

Explanation:

Answer:

Wave W is a sound wave, Waves X and Y are light waves, and it is impossible to tell what kind of wave Wave Z is.

Explanation:

W      travels fastest through metal

X       travels fastest through air,

Y       travels more slowly through water than air    

Z       travels more slowly at cool temperatures

W appears to be sound wave  as sound travels fastest through metal .

X appears to be light wave as light travels fastest in air .

Y also appears to be light wave as  speed of light is reduced when it passes from air to water .

Z  It is impossible to tell anything about the nature of Z wave .

Answer:

d

Explanation:

Answer:

4.58×10²³ atoms

5.94×10⁻²¹ J

1340 m/s

Explanation:

Use ideal gas law to find moles of gas.

PV = nRT

(1.266 atm × 101300 Pa/atm) (4/3 π (0.15 m)³) = n (8.31451 J/mol/K) (14 + 273) K

n = 0.760 mol

Use Avogadro's number to find number of atoms.

(0.760 mol) (6.02214×10²³ atom/mol) = 4.58×10²³ atoms

Average kinetic energy per molecule is:

KE = 3/2 kT

KE = 3/2 (1.38066×10⁻²³ J/K) (14 + 273) K

KE = 5.94×10⁻²¹ J

RMS speed of each atom is:

KE = 1/2 mv²

5.94×10⁻²¹ J/atom = 1/2 (0.004 kg/mol) (1 mol / 6.02214×10²³ atom) v²

v = 1340 m/s

Answer:

Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water

Explanation:

Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth. If a cloud is colder, like it would be at higher altitudes, the water droplets may freeze to form ice.

Precipitation forms in the clouds when water vapor condenses into bigger and bigger droplets of water. When the drops are heavy enough, they fall to the Earth.

Answer:

Bruh............

Explanation:

Answer:

d) refraction

Explanation:

in physics, refraction is the change of direction of a wave passing from one medium to another. refraction of light is the most commonly observed phenomenon but other waves such as sound waves and water waves also experience refraction

Answer:

B. Translocation

Explanation:

It means a change in location. It often refers to genetics, when part of a chromosome is transferred to another chromosome, you want a change in location because you are so thirsty in the desert and need water

Angle of incidence always equals angle of reflection. Think of a tennis ball being hit into a wall. The ball will bounce off at the same angle that it approached with. The angles mentioned are formed through the line called the "normal", which is the line perpendicular to the surface.

Answer:

[tex]\boxed{299}[/tex]

Explanation:

In this reaction, Sum of Atomic Masses of Left side = Sum of Atomic Masses of right side

Let the atomic mass of Thorium be x

So,

233 = 4 + x

Subtracting 4 to both sides

x = 233-4

x = 229

Answer:

The direction is that of a 3rd quadrant angle

Explanation:

when you have 2 45 angles it equals to 90 then with the 90 we multiply by 2 due to the 2 adjacent angles equating to 180 which swings it to the 3rd quadrant angle

Answer:

Option A is an accurate one.

Explanation:

The other provided alternative is not related to the information provided there. So the response to the above seems to be the correct one.

Answer:

3000 m/s

Explanation:

The kinetic energy is:

KE = 3/2 kT

where k is Boltzmann constant and T is absolute temperature.

Kinetic energy is also:

KE = 1/2 mv²

where m is the mass and v is the speed.

1/2 mv² = 3/2 kT

mv² = 3kT

v = √(3kT / m)

v = √(3 × 1.38×10⁻²³ J/K × (273 + 27) K / 1.38×10⁻²⁷ kg)

v = 3000 m/s

First of all, what is a cell?

A cell is a power source. It converts chemical energy into electrical energy which then allows a current to flow.

Then, what is a voltage?

A voltage is an electrical force required to push an electric current.

The answer to your question

The powers source requires a voltage of 1.5 to push the electrical current around the circuit