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ankoles [38]
4 years ago
15

Для вимірювання температури води, що має масу 66 г, у неї занурили термометр, який показав температуру 32,4 °С. Якою була дійсна

температура води, якщо теплоємність термометра 1,9 Дж\кг•°с і перед зануренням у воду він показував температуру навколишнього середовища рівну 17,8°С? Питома теплоємність води 4200 Дж\кг•°С
Physics
1 answer:
Aleksandr-060686 [28]4 years ago
4 0

Answer:

я не знаю відповіді

Explanation:

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A train travels 55km, south along a straight track in 34minutes. What is the train Ls average velocity in kilometers per hour
Westkost [7]

Answer:

96.5 km/h

Explanation:

The average velocity of the train is given by:

v=\frac{d}{t}

where

d is the displacement

t is the time taken

For this train, we have:

d = 55 km south (displacement is a vector, so we must also consider the direction)

t= 34 min \cdot \frac{1}{60 min/h}=0.57 h

Substituting into the equation, we find the average velocity:

v=\frac{55 km}{0.57 h}=96.5 km/h

5 0
3 years ago
Find equation tangent to a circle at given point
vlabodo [156]

the equation of the tangent line must be passed on a point A (a,b) and perpendicular to the radius of the circle. <span>
I will take an example for a clear explanation:
let x² + y² = 4 is the equation of the circle, its center is C(0,0). And we assume that the tangent line passes to the point A(2.3).

</span>since the tangent passes to the A(2,3), the line must be perpendicular to the radius of the circle. 

<span>Let's find the equation of the line parallel to the radius.</span>

<span>The line passes to the A(2,3) and C (0,0). y= ax+b is the standard form of the equation. AC(-2, -3) is a vector parallel to CM(x, y).</span>

det(AC, CM)= -2y +3x =0, is the equation of the line // to the radius.

let's find the equation of the line perpendicular to this previous line.

let M a point which lies on the line. so MA.AC=0 (scalar product), 

it is (2-x, 3-y) . (-2, -3)= -4+4x + -9+3y=4x +3y -13=0 is the equation of tangent



7 0
3 years ago
What is the difference between wave and wave motion​
Viktor [21]
This is your answer.

8 0
4 years ago
A fly with a mass of 0.0025 kg flies at a rate of 20.0 m/s. What is the kinetic energy of the fly?
tamaranim1 [39]
KE = 0.5mV^2 = 0.5 * 0.0025 * (20)^2 = 
<span>0.5 Joules.</span>
5 0
3 years ago
Read 2 more answers
1. Which of the following is NOT a vector quantity? (a) Displacement. (b) Energy. (c) Force. (d) Momentum. (e) Velocity.
dem82 [27]

Answer:

B. energy

Explanation:

A vector has direction.

Energy does not have a direction.

5 0
3 years ago
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