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3 years ago

Physical change of a solid to a liquid at the melting point

1 answer:

5 0

This occurs when the internal energy of the solid increases, typically by the application of heat or pressure, which increases the substance's temperature to the melting point. At the melting point, the ordering of ions or molecules in the solid breaks down to a less ordered state, and the solid melts to become a liquid.

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How long does it take a car traveling at 50 mph to travel 75 miles? Use one of the following to find the answer.

Anna35 [415]

Answer:

1.5 hours

Explanation:

Using the equation t=d/v to solve for time:

t=75 miles ÷ 50 miles per hour = 1.5 hours

5 0

3 years ago

Read 2 more answers

Your school science club has devised a special event for homecoming. You've attached a rocket to the rear of a small car that ha

Strike441 [17]

Answer:

Explanation:

Acceleration acts for 9 s and deceleration acts for 12 - 9 = 3 s.

Total distance covered = 990 m

initial velocity u = o

Distance covered while accelerating

s₁ = 1/2 a 9² where a is the acceleration

= 40.5 a

final velocity after 9 s

v = at = 9a

while decelerating

v² = u² - 5 x s₂

0 = (9a)² - 5 s₂

s₂ = 16.2 a²

Distance covered while decelerating = 16.2 a²

s₁ + s₂ = 990

40.5 a + 16.2 a² = 990

16.2 a² + 40.5 a - 990 = 0

a = 6.5

4 0

3 years ago

Write the physics equation for this graph in slope-intercept form (y=mx+b), expressed in terms of the appropriate variables.

alexgriva [62]

The equation that describes the graph is y = 16.7x + 150.

<h3>What is the equation?</h3>

We have been given the graph of a certain function data set in physics. We know that the graph is the representation of data on cartesian coordinates. In this case, we are asked to find the equation of the graph in the form; y=mx+b

m = slope of the graph

b = intercept of the graph.

To obtain the slope;

m = y2 - y1/ x2 - x1

m = 400 - 200/ 16 - 4

m = 200/ 12

m = 16.7

Then we can see from the graph that the y - intercept is 150. Having these data, the equation that could describe the graph is now;

y = 16.7x + 150

Learn more about graph:brainly.com/question/13301664

#SPJ1

4 0

1 year ago

234.019 scientific notation

svp [43]

Hey there!

$Answer:\boxed{2.34019*10^2}$

$Explanation:$

Scientific Notation for $234.019$ :

$\boxed{2.34019*10^2}\text{ is your answer.}$

Hope this helps!

$\text{-TestedHyperr}$

4 0

3 years ago

At what speed will a car round a 52-m-radius curve, banked at a 45???? angle, if no friction is required between the road and ti

Serhud [2]

Answer:

c. 23 m/s

Explanation:

$\theta$ = Angle of banking = 45°

r = Radius of turn = 52 m

g = Acceleration due to gravity = 9.81 m/s²

v = Velocity of car

As the car is tilted we have the relation

$tan\theta=\dfrac{v^2}{rg}\\\Rightarrow v=\sqrt{tan\theta rg}\\\Rightarrow v=\sqrt{tan45\times 52\times 9.8}\\\Rightarrow v=22.57432\ m/s\approx 23\ m/s$

The velocity of the car is 23 m/s if the car is not slipping

4 0

3 years ago