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3 years ago

All electric circuits have devices that are run by _____ energy.

Physics

1 answer:

KATRIN_1 [288]3 years ago

8 0

Answer: electrical energy

Explanation:

Electrical energy

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*<br> What is 72 km/hr in m/s?<br> Your<br> answer<br> This is a required question

disa [49]

Answer:

20 meters per second

Explanation:

3 0

4 years ago

A 1.2 kg block is held at rest against the spring with a force constant k= 730 N/m. Initially, the spring is compressed a distan

mariarad [96]

Answer:

d = 9.69 cm

Explanation:

given,

mass of the block = 1.2 Kg

spring force constant(k) = 730 N/m

spring is compressed = d = ?

rough patch width = 5 cm

μ_k = 0.44

work done by friction = energy lost

$\mu_k mg \times x = \dfrac{1}{2}kd^2-\dfrac{1}{2}mv^2$

$0.44\times 1.2 \times 9.8 \times 0.05 = \dfrac{1}{2}\times 730 \times d^2-\dfrac{1}{2}\times 1.2 \times 2.3^2$

$3.432 = 365 d^2$

$d = \dfrac{3.432}{365}$

d = 0.0969 m

d = 9.69 cm

5 0

3 years ago

The frequency of a sound wave is commonly called

Rzqust [24]

The answer is Hertz (Hz) named in honor of the German scientist Heinrich Hertz, who first conclusively proved the existence of electromagnetic waves.

3 0

3 years ago

Consider a basketball player spinning a ball on the tip of a finger. If a player performs 1.99 J of work to set the ball spinnin

sladkih [1.3K]

Answer:

25.8 rad/s

Explanation:

C = circumference of the hollow sphere = 0.749 m

r = radius of the sphere

Circumference of the hollow sphere is given as

C = 2π r

0.749 = 2 (3.14) r

r = 0.12 m

m = mass of the basketball = 0.624 kg

Moment of inertia of basketball is given as

$I = \left ( \frac{2}{3} \right )mr^{2}$

$I = \left ( \frac{2}{3} \right )(0.624)(0.12)^{2}$

I = 5.99 x 10⁻³ kg-m²

w = angular speed

KE = Kinetic energy of the ball = 1.99 J

Kinetic energy of the ball is given as

KE = (0.5) I w²

1.99 = (0.5) (5.99 x 10⁻³) w²

w = 25.8 rad/s

5 0

3 years ago

A feather is dropped onto the surface of the moon. How far will the feather have fallen if it reaches the surface in 9.00 second

blagie [28]

   Distance of fall = (1/2) · (acceleration of gravity) · (time)²

   = (1/2) · (1.63 m/s²)   ·   (9 sec)²

   = (0.815 m/s²) · (81 sec²)

   = 66 meters .

On Earth ... IF there were no air ... the feather would fall
397 meters in the same amount of time !

3 0

3 years ago