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3 years ago

A spring has a spring constant of 115 N/m. How much energy is stored in the

Physics

2 answers:

noname [10]3 years ago

8 0

Explanation:

Elastic energy stored in a spring is:

EE = ½ kx²

EE = ½ (115 N/m) (0.15 m)²

EE = 1.3 J

andrey2020 [161]3 years ago

6 0

<u>Answer:</u> The energy stored in the spring is 1.33 J

<u>Explanation:</u>

To calculate the energy stored in the spring, we use the equation:

$E=\frac{1}{2}kx^2$

where,

E = energy stored in the spring

k = spring constant = 115 N/m

x = compression of the spring = 0.15 m

Putting values in above equation, we get:

$E=\frac{1}{2}\times 115\times (0.15)^2\\\\E=1.33J$

Hence, the energy stored in the spring is 1.33 J

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The device or instrument that transforms light energy to electrical energy

WINSTONCH [101]

Answer:

Solar panels

sun light into electricity

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3 years ago

In physics, a field refers to a quantity that has a value for every point in a space. In a sense, a field is like a function in

enyata [817]

Answer:

Explanation:

a ) Temperature at ground level is a field and it is scalar field .At any point in space near ground level , the temperature is specific so it is a field . It is scalar because temperature has no direction .

b )

Wind velocity at 100 feet above the ground is also a field but it is a vector field . At any point in space , the wind velocity is specific so it is a field . It is vector because velocity has a particular direction at any point .

c )

Gravitational force on Roessler Hall is a vector field because gravitational force also depends on location in space and it has direction.

d )

Height of a person in your group is not a space because it does not depend upon location is space . It is same for all location .

e )

Height (above sea level) of the ground is a field because it also depends upon location in space . It is scalar field .

f )

Slope of the surface of the earth is a scalar field .

3 0

3 years ago

A disk of radius 10 cm speeds up from rest. it turns 60 radians reaching an angular velocity of 15 rad/s. what was the angular a

Marianna [84]

Answer:

α = 1.875 rad/s²

t = 8 s

Explanation:

α = ω²/2θ = 15²/(2(60)) = 1.875 rad/s²

t = ω/a = 15 / 1.875 = 8 s

6 0

3 years ago

A piston-cylinder device initially contains 0.6 kg of water with a volume of 0.1 m3 . The mass of the piston is such that it mai

Sloan [31]

Answer: Hello the missing piece of your question is attached

question : Determine mass of steam that has entered ( in kg )

answer : 0.206 kg

Explanation:

V1 = 0.1 m^3 ,

v' = V1 / m1 = 0.1 / 0.6 = 0.167 m^3/kg

V2 = 0.2 m^3

using the steam tables

at ; P = 1000 kPa, v' = 0.167 m^3/kg

U1 = 2321 KJ/kg

at ; P = 1000 kPa , T2 = 280°C

v'2= 0.2481 m^3kg

U2 = 2760.6

at ; P = 5MPa , T = 500°C

h1 = 3434.7 KJ/Kg

calculate final mass ( m2 )

M2 = V2 / v'2

= 0.2 / 0.2481 = 0.806 kg

therefore the mass added = m2 - m1

= 0.806 - 0.6 = 0.206 kg

3 0

2 years ago

A very hard rubber ball (m = 0.5 kg) is falling vertically at 4 m/s just before it bounces on the floor. The ball rebounds back

saw5 [17]

Answer:

The force exerted by the floor is 80 N.

Explanation:

Given that,

Mass of ball = 0.5 kg

Velocity= 4 m/s

Time t = 0.05 s

When the ball rebounds then the kinetic energy is

$K.E =\dfrac{1}{2}mv^2$

Where, m = mass of ball

v = velocity of ball

Put the value into the formula

$K.E=\dfrac{1}{2}\times0.5\times(4)^2$

$K.E = 4\ J$

The average force exerted by the floor on the ball = change in kinetic energy over collision time

$F = \dfrac{4}{0.05}$

$F=80\ N$

Hence, The force exerted by the floor is 80 N.

4 0

3 years ago