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blagie [28]
3 years ago
13

PLEASE PLEASE I DONT KNOW HOW TO ANSWER THIS ANYTHING WOULD HELP THANKS SO MUCH

Physics
2 answers:
fomenos3 years ago
8 0

Thankfull for point's.

Ksivusya [100]3 years ago
5 0
Not sure maybe khan academy can be helpful has been to me :)
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A block of 250-mm length and 48 × 40-mm cross section is to support a centric compressive load P. The material to be used is a b
Marrrta [24]

Answer:

153.6 kN

Explanation:

The elastic constant k of the block is

k = E * A/l

k = 95*10^9 * 0.048*0.04/0.25 = 729.6 MN/m

0.12% of the original length is:

0.0012 * 0.25 m = 0.0003  m

Hooke's law:

F = x * k

Where x is the change in length

F = 0.0003 * 729.6*10^6 = 218.88 kN (maximum force admissible by deformation)

The compressive load will generate a stress of

σ = F / A

F = σ * A

F = 80*10^6 * 0.048 * 0.04 = 153.6 kN

The smallest admisible load is 153.6 kN

8 0
3 years ago
If a wood is drowned in water up to 2/3 of its volume and the same wood is dipped in a oil upto 9/10 of its volume.What's the de
MrMuchimi
S.G. or specific gravity is the ratio of the density of an object to a fluid. It also is the fraction of the object's volume that would be submerged if the object were placed in the fluid. (note: if S.G.>1, the object will sink)

S.G. = density(wood) / density(water)

2/3 = density(wood) / 1000

density(wood) = 2000/3 kg/m^3 = ~666.67 kg/m^3

S.G. = density(wood) / density(oil)

9/10 = 2000/3 / density(oil)

density(oil) = 2000/3 / 9/10 = 20000/27 kg/m^3 = ~740.74 kg/m^3
7 0
3 years ago
A simple pendulum 2 m long swings through a maximum angle of 30 ? with the vertical.
Alexus [3.1K]
The complete question was calculate the period T assuming the smallest amplitude.
Using the equation;
T = 2 π√(L/g)
Where T is the period in seconds, L is the length of the rod or wire in meters and g is the acceleration due to gravity. 
Hence; T = 2×3.14 × √(2/9.81)
                = 6.28 × 0.4515
                = 2.836 seconds
6 0
3 years ago
Un auto parte desde un lugar a las 6:00 de la mañana con una rapidez de 150 Km/hr a través de una carretera recta. a) ¿Qué dista
Gwar [14]

Answer:

600 km

6 hours

Explanation:

El tiempo que viaja el automóvil de 6 a 10 de la mañana es 10-6=4\ \text{horas}

La velocidad del coche es 150 km/hr

La distancia está dada por

\text{Distancia}=\text{Velocidad}\times \text{Tiempo}

150\times 4=600\ \text{km}

A distancia recorrida a las 10 de la mañana es de 600 km.

Ahora el tiempo que se toma está dado por

\text{Tiempo}=\dfrac{\text{Distancia}}{\text{Velocidad}}

\dfrac{900}{150}=6\ \text{horas}

El tiempo que se tarda en recorrer 900 km es de 6 horas.

8 0
3 years ago
What is a substance?
ycow [4]

A.a uniform mixture that can’t be separated

"substance" seems vague here

3 0
3 years ago
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