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4 years ago

Please help answer this question! ^^^

Physics

1 answer:

Law Incorporation [45]4 years ago

7 0

Answer:

P.E = 0.64 k joules

Explanation:

Given data,

The mass of the block, m = 8 kg

The compression of the spring, x = 0.8 m

The spring constant is given by 'k'

When a spring is compressed to a length x, the energy stored in the spring is purely potential.

The potential energy stored in the compressed spring is given by the formula,

P.E = kx²

Substituting the given values,

P.E = k x 0.8²

P.E = 0.64 k joules

Where 'k' is the spring constant of the given spring.

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Calculate the angular momentum of a solid uniform sphere with a radius of 0.150 m and a mass of 13.0 kg if it is rotating at 5.7

Ivahew [28]

Answer:

The angular momentum of the solid sphere is 0.667 kgm²/s

Explanation:

Given;

radius of the solid sphere, r = 0.15 m

mass of the sphere, m = 13 kg

angular speed of the sphere, ω = 5.70 rad/s

The angular momentum of the solid sphere is given;

L = Iω

Where;

I is the moment of inertia of the solid sphere

ω is the angular speed of the solid sphere

The moment of inertia of solid sphere is given by;

I = ²/₅mr²

I = ²/₅ x (13 x 0.15²)

I = 0.117 kg.m²

The angular momentum of the solid sphere is calculated as;

L = Iω

L = 0.117 x 5.7

L = 0.667 kgm²/s

Therefore, the angular momentum of the solid sphere is 0.667 kgm²/s

4 0

3 years ago

I need Help ASAP, and actually help, not just for the points.

UNO [17]

Answer:

750 force

Explanation:

I have never worked with force but I can guess using the formula. 1500, which is the mass, multiplied by the acceleration, 0.5, would equal 750 force, if being applied by the equation listed, Force= mass×acceleration

7 0

3 years ago

Read 2 more answers

An open pipe is 1.42 m long

lora16 [44]

Answer:

the fundamental frequency produced by the open pipe is 120.78 Hz

Explanation:

Given;

length of the open pipe, L = 1.42 m

speed of sound in air, v = 343 m/s

The length of the open pipe for the fundamental frequency is equivalent to half of wavelength;

$L = \frac{\lambda}{2} \\\\\lambda = 2L$

The fundamental frequency produced by the open pipe is calculated as;

$f_o = \frac{v}{\lambda} \\\\f_o = \frac{v}{2L} \\\\f_o = \frac{343}{2 \times 1.42} \\\\f_o = 120.78 \ Hz$

Therefore, the fundamental frequency produced by the open pipe is 120.78 Hz

6 0

3 years ago

Two electric motors drive two elevators of equal mass in a three-story building 10 meters tall. Each elevator has a mass of 1,00

vaieri [72.5K]

Answer:

Explanation:

Given data

mass m=1000 kg

building height=10 m

Find work

Solution

As we know that:

$Work=mass*gravity*height\\W=mgh\\W=(1000kg)*(9.8m/s^{2} )*(10m)\\W=9.8*10^{4}J$

So option (C) is correct one

4 0

3 years ago

Both the electrical force and the gravitational force between two objects share which relationship?

julia-pushkina [17]

Answer:

B. They are inversely proportional to the square of the distance.

Explanation:

The gravitational force between two objects is given by:

$F_G = G \frac{m_1 m_2}{r^2}$

where

G is the gravitational constant

m1, m2 are the masses of the two objects

r is the distance between the two objects

While the electrical force is given by

$F_E = k \frac{q_1 q_2}{r^2}$

where

k is the Coulomb's constant

q1, q2 are the charges of the two objects

r is the distance between the two objects

As we see from the two equations, both forces are inversely proportional to the square of the distance, so the correct option is

B. They are inversely proportional to the square of the distance.

7 0

4 years ago