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3 years ago

When heat is added to ice, the first change it goes through will be which of the following?

Physics

1 answer:

Mariulka [41]3 years ago

7 0

Answer:

it will begin to melt into a liquid

Explanation:the ice will melt first before turning into a liquid.

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The pilot of an aircraft wishes to fly due west in a wind blowing at 45 km/h toward the south. If the speed of the aircraft in t

DiKsa [7]

Answer:

164.2°

Explanation:

speed of wind (w) = 45 km/h due south

speed of aircraft (a) = 165 km/h

in what direction (in degrees) should the aircraft head in so as to fly due west?

To get the direction the pilot should fly, we can form a triangle with the data available where

the direction of the wind (due south) serves as the opposite side
the direction the pilot would have to fly so he can end up at he west serves as the hypothenuse
θ is the angle between the direction the pilot would have to fly and the direction the pilot wishes to fly.
the direction the pilot wishes to fly ( west) will serve as the adjacent side
all this can be seen from the attached diagram.

now sin θ = $\frac{speed of the wind}{speed of the aircraft}$

sin θ = $\frac{45}{165}$

θ = $sin^{-1}$ 0.2728

θ = 15.8°

since we are to use the counter-clockwise from east convention our measurement would have to be taken anticlockwise from the east direction, therefore the direction of the aircraft (Ф) = 180-15.8 = 164.2°

3 0

3 years ago

How fast is a skydiver going after 5 seconds or free fall and how far did he fall

RSB [31]

i'm just saying that this question makes no sense to me....but thanks for the points UwU

3 0

3 years ago

Read 2 more answers

A pendulum is constructed from a string 0.0530 m long attached to a mass of 0.200 kg. When set into motion, the pendulum complet

Jet001 [13]

To solve this problem we will start from the pendulum period equation. From there we will find the value of gravity. Later it will be possible to apply the linear motion kinematic equations, for which we will use the value of the distance traveled and the gravity in order to find the fall time. The time period of the pendulum is

$T=2\pi\sqrt{\frac{L}{g}}$

Here,

L is the length of the pendulum

g is acceleration due to gravity.

Rearranging to find g,

$g = \frac{4\pi^2 L}{T^2}$

Replacing,

$g = \frac{4\pi^2 (0.0530)}{1.5^2}$

$g = 0.9299m/s^2$

Now using,

$x=v_0 t + \frac{1}{2} gt^2$

Here,

$v_0 =$ Initial velocity (0 because the pendulum is at rest)

t is time taken to cover the distance .

$x = \frac{1}{2}gt^2$

Replacing,

$2.5 = \frac{1}{2} (0.9299) t^2$

Solving for t

$t = 2.3188s$

Therefore it will take to fall through the distance of 2.5m around to 2.31s

5 0

3 years ago

A truck moves 60 kilometers east from point A to point B. At point B, it turns back west and stops 15 kilometers away from point

iogann1982 [59]

Answer:

Distance: 75 km

Displacement: 45 km

Explanation:

- Distance is a scalar quantity that refers to the total space covered by an object. It is calculated as the sum of the distances covered in each motion, regardless of their direction. therefore in this case:

distance = 60 km + 15 km = 75 km

- Displacement is a vector quantity whose magnitude is equal to the difference between the final point and the starting point of the motion, so it also takes into account the direction of each motion. In this case, the truck moves 60 km east, and then 15 km west: if we call '0' the starting point, the final point will be then

$p_B = 60 km - 15 km=45 km$

And so the displacement is

$d=p_B - p_A=45 km - 0 = 45 km$

6 0

3 years ago

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What is the main fuel consumed in the core of a red giant? a. H b. C c. Fe d. He

vladimir1956 [14]

What is the main fuel consumed in the core of a red giant?
The main fuel consumed in the core of a red giant is He or helium. The answer is letter D.

4 0

3 years ago