What material composes most of the volume of planets jupiter and saturn?

A cell has an emf of 1.5 V and an internal resistance of 0.65 Q.

marin [14]

Answer:

Explanation:

1) emf stands for elactro-motive force and represents the ability to move electrical charge carriers. Commonly referred to as Volts.

2) P = VI = 1.5(0.31) = 0.465 ≈ 0.47 W

3) P = 0.465 - I²R = 0.465 - 0.31²(0.65) = 0.402535 W = J/s ≈ 0.40 J

4) 14000 J / 0.40 J/s = 35 000 s or about 9.75 hrs

5 0

3 years ago

Read 2 more answers

How does changing depth affect water pressure

Yuki888 [10]

Cause the deeper you go ( for an example the ocean) the water pressure increases rapidly.

4 0

3 years ago

A 50n brick is suspended by a light string from a 30kg pulley which may be considered a solid disk with radius 2.0m. the brick i

igomit [66]

Brick is held at a position which is at height 2 m from the floor

Now it is released from rest and hit the floor after t = 4 s

Now the acceleration of the brick is given by

$y = v_i* t + 0.5 at^2$

$2 = 0 + 0.5 * a * 4^2$

$a = 0.25 m/s^2$

a)

Now in order to find the tension in the string

we can use Newton's law

$F_{net} = ma$

$mg - T = ma$

$50 - T = \frac{50}{9.8}*0.25$

$T = 48.72 N$

part b)

Now for the pulley

moment of inertia= $\frac{1}{2}mr^2$

m = 30 kg

R = 2 m

I = $\frac{1}{2}*30*2^2$

I = 60 kg m^2

Now the angular speed just before brick collide with the floor

$w = \frac{v}{r}[\tex]here we have[tex]v = v_i + a* t$

$v = 0 + 0.25 * 4$

v = 1 m/s

Now we will have

L = angular momentum = I w = $I*\frac{v}{R}$

L = 60 * $\frac{1}{2}$

L = 30 kg m^2/s

8 0

3 years ago

A physical circuit refers to the transmission characteristics of the connection, such as the speed at which data is being sent t

Morgarella [4.7K]

Answer:

No, a physical circuit is just a path connecting point and switches. It cannot be related to the transmission characteristics. It's the logical circuit which can be refers to the transmission characteristics of connection such as speed of data etc. So the answer is false.

Explanation:

5 0

3 years ago

Two teams of nine members each engage in a tug of war. Each of the first team’s members has an average mass of 65 kg and exerts

Leviafan [203]

Answer:

.team 1 a = 20.8 m/s² team 2 a = 19.2 m/s²

Explanation:

Let's use Newton's second law to calculate the acceleration of the two groups

F = ma

a = F / M

Group 1

a = 9 1354/9 65

a = 20.8 m / s²

Group 2

a = 9 1364/9 71

a = 19.2 m / s²

If the two groups pull against each other, group 1 should win, by creating a greater acceleration.

Δa = 20.8 -19.2

Δa = 1.6 m / s²

4 0

4 years ago