The diagram shows a heating curve for water.
Which statement best describes what is happening at
segment W-X?
Heating Curve for Water
O Water is absorbing heat.
O Water is releasing heat.
O Aliquid is changing to a gas.
O A gas is changing to a liquid.
z
110
100
90
x
х
Y
80
Temperature (Cº)
70
60
50
40
w
Heat (J)

Answer:

First truck has greater momnetum

Explanation:

momentum = m * v

truck a    5000 * 20 = 10 0000

truck b   1000 * 50   = 5 0000

Answer:

Explanation:

Answer: Sonic Boom.

When the object reaches the speed of sound, air cannot readily move out of the way and a shock wave is formed. When the object is moving faster than sound, the resulting sounds travel behind the object, creating a sonic boom.

Answer:

the moon will be in between the sun and the moon covering the earth view of the sun

First normal transportation is the light energy of sun is transmitted to our earth .

Next for transportation inside sun they are

Fusion means when two hydrogen atoms reacts to form helium nucleus .

Fission means when one nucleus is broken into two or more nucleus

Explanation:

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ॐhน໓ค • ๓นhค๓๓ค໓ঔৣ

ॐŞiŞ¢ค • วนคriคঔৣ

Answer:

V = S / d = 60 m / 1.5 sec = 40 m/s

Note 40 m/s = 40 * 3.28 = 131 ft/sec

131 ft/sec =  131 ft/sec / (88 ft/sec / 60 mph) =   89 mi/hr

For the magnitude in N.m of the torque exerted by the fish about an axis perpendicular to the page and passing through the angler's hand is mathematically given as

Z = 360.33Nm

Generally, the equation for the Torque is mathematically given as

Z = force x perpendicular distance

Z = Tcos30° x L

Z = 166(0.886) x 2.45

Z = 360.33Nm

In conclusion s the magnitude in N.m of the torque exerted by the fish about an axis perpendicular to the page and passing through the angler's hand

Z = 360.33Nm

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Answer:

Explanation:

The kinetic friction between crate and the surface can be calculated as follows: [tex]f_{k}=\mu_{k}N=\mu_{k}mg=(0.24)(2)(10)=4.8 N[/tex]

Assume that the direction of the 10 N constant force is on the right, the kinetic friction will go the left, then:

[tex]\sum F=F_{net}=F-f_{k}=10-4.8=5.2 N[/tex]

A constant force of 10 N is applied to a crate of mass 2 kg on a rough surface, then the net force on the crate is 5.2 N

Friction is the resistance to a thing sliding or rolling over another solid object. Although frictional forces can be helpful, such as the traction required to walk without sliding, they also provide a significant level of resistance to motion.

The forces of attraction, also called as adhesion, between both the contact zones of the surfaces, that are always microscopically uneven, seem to be the main contributor to friction among metals.

These "welded" joints are sheared, and friction is created by the irregularities of a harder surface scuffing down against the softer surface.

From the given data in the question,

Firstly, calculate the friction between the crate and the surface,

[tex]f_k\\[/tex] = [tex]\mu_k[/tex]mg

= (0.24)(2)(10)

= 4.8 N

Now, let's calculate the net force,

ΣF = F(N) = F - [tex]f_k[/tex]

= 10 - 7.8

= 5.2 N

Therefore, the net force will be equal to 5.2 N.

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Answer:

Ek= 1/2*m*v^2

Explanation:

kinetic energy= 1/2* mass * square velocity

Answer: It's 2 and 3

Explanation:

Explanation:

solution: mass m = 5g = 0.005kg; extension e = 7cm = 0.07m; force f = 70 N; velocity = ?; using: work done in elastic material w = 1/2 fe = 1/2 ke2 = 1/2 mv2 - the kinetic energy of the moving stone. 1/2 fe =...

Answer:

44°

Explanation:

Look for the longest distance under the 'Distance ' column....look to the left to find the corresponding angle

  Table clearly shows that the longest distance (133 ft) occurs at angle of 44°

Answer:

42

Explanation:

P = M × V

so

P = 35 × 1.2

P = 42

Answer:

42kg•m/s

Explanation:

p=m*v

Answer:

180 m amp

Explanation:

V = IR

v/r = i     mutiply both sides by

3

3v / r = 3 i     so the current will triple to 180 mAmp

Answer:

37500 N

Explanation:

F = ma

F = 7500 (5 m/s^2) = 37500 N

Box A has 2x the mass of Box B so Box A has more inertia as compared to Box B.

More the mass of an object, there is more inertia of the body. Thus, if mass of two bodies is same their inertia will also be same. Hence, inertia of A and B will be same as mass of both A and B are same.

So we can conclude that Box A has 2x the mass of Box B so Box A has more inertia as compared to Box B.

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Answer:

Heat is a form of energy. It is measured in Joules. ... The temperature of an object relates to both the kinetic energy of its particles and the number of particles. Temperature is the average kinetic energy of the particles in a substance.

Explanation:

Answer:

it states that the atom will rest confortably in the ground state and will not collapse for lack of energy

a. The net force from t = 1 to t = 6 s is 112 N

b. The net force from t = 7 to t = 12 s is 0 N

Force is that thing which causes a change in motion of an object. The net force is given mathematically as F = ma where

This is the resultant sum of all the forces acting on an object. It is also given by F = ma where

The net force from t = 1 to t = 6 s is 112 N

From the table from time t = 1 to t = 6 s, the acceleration a = 1.4 m/s². Since m = 80 kg,

F = ma

= 80 kg × 1.4 m/s²

= 112 kgm/s²

= 112 N

So, the net force from t = 1 to t = 6 s is 112 N

The net force from t = 7 to t = 12 s is 0 N

From the table from t = 7 to t = 12 s, the acceleration a = 0 m/s²

Since m = 80 kg,

F = ma

= 80 kg × 0 m/s²

= 0 kgm/s²

= 0 N

So, the net force from t = 7 to t = 12 s is 0 N

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Take action on climate change has a positive effect on health of organisms and environment.

Spread awareness and encourage friends, family and co-workers to reduce carbon pollution, reduce burning of fossil fuels by using electrical vehicle and devices. Always buy sustainable products and avoid the use of plastics.

We have to take action on climate change because it improved health,  maintain the population of organism, and reduced inequality. So we can conclude that take action on climate change has a positive effect on health of organisms and environment.

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(a) The turtle's initial velocity is 4 m/s, initial position of the turtle is 5 cm, and initial acceleration is -1.25 m/s².

(b) The time when the velocity of the turtle is zero is 3.2 s.

(c) The time taken for the turtle to return to its starting point is 6.4 s.

(d) The time taken for the turtle to travel 30 cm is 0.08 s.

The initial velocity of the turtle is calculated as follows;

[tex]v = \frac{dx}{dt} \\\\x = 5 + 4t -0.625t^2\\\\v(t) = 4 - 1.25t\\\\v(0) = 4-0\\\\v(0) = 4 \ m/s[/tex]

The initial acceleration of the turtle is calculated as follows;

[tex]a = \frac{dv}{dt} \\\\v(t) = 4 - 1.25t\\\\a = -1.25\ m/s^2[/tex]

x(t) = 5 + 4t - 0.625t²

x(0) = 5 cm

v(t) = 4 - 1.25t

0 = 4 - 1.25t

1.25t = 4

t = 4/1.25

t = 3.2 s

The total distance traveled is calculated as follows

v² = u² + 2ad

0 = (4)² + 2(-1.25)d

0 = 16 - 2.5d

2.5d = 16

d = 16/2.5

d = 6.4 m

Time to travel the given distance;

d = ut + ¹/₂at²

6.4 = (4)t + ¹/₂(-1.25)t²

6.4 = 4t - 0.625t²

0.625t² - 4t + 6.4 = 0

solve the quadratic equation using formula method;

t = 3.2 s

The time travel the distance two times, = 2 x 3.2 s = 6.4 s

d = ut + ¹/₂at²

0.3 = (4)t + ¹/₂(-1.25)t²

0.3 = 4t - 0.625t²

0.625t² - 4t + 0.3 = 0

solve the quadratic equation using formula method;

t = 0.08 s

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Answer:

Advantage: it could get rid of some unwanted waste. Disadvantage: it would emit pollution into the air.

Answer:

50 cubic cm

Explanation:

As the water displaces 50 cubic centimeters the amount of water that must leave the container for it to be able to be dropped into it is also 50 cubic as the water which was in its place must have gone somewhere.

Answer:

As mass increases, the acceleration of an object decreases because more force is required.

Explanation:

The question states that the student made a mass acceleration graph with the force being constant, if you think about this in everyday life, would pushing a 30 kg box be easier than that of a 15 kg box? Obviously not because if you have the same force for both of them the 15 kg box would have a greater acceleration than the 30 kg one (assuming they are on the same surfaces and the same amount of force is applied.)

Therefore we can say that as the mass of an object increases the acceleration must decrease because we need more force to push the object.

Answer:

A

Explanation:

the atomic number means the number of protons so there are 50 protons

the number of positive charges (protons) should equal the number of negative charges (electrons) so there should be 50 electrons

the mass number = neutrons number + protons number

and we knew already that we have 50 protons so the number of neutrons is 125-50=75 neutrons

Answer:

So where's the problem now?

A kitten is just sitting

Answer:

c

Explanation:

Answer:

the volume increases and the density decreases

Explanation:

This is because when a liquid is cooled it expands due anomalous expansion of water hence volume increases .The density decreases. For instance ice floats on water since it has lesser mass than water per unit volume.