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worty [1.4K]
4 years ago
13

Which of the following is true for a parallel circuit?

Physics
2 answers:
siniylev [52]4 years ago
5 0
B. The voltage is the same across all resistors in the circuit.
Anarel [89]4 years ago
3 0
Your answer would be B, as in bee.
Get it? 

-Gives thumbs up- 
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A 2 kilogram object falls a distance of 5 meters. How much potential energy does this object have before it falls? How much work
Y_Kistochka [10]

1) Potential energy before the fall: 98 J

The gravitational potential energy of an object is given by:

U=mgh

where m is the mass of the object, g is the gravitational acceleration and h the heigth of the object above the ground.

In this problem, m = 2 kg, g = 9.8 m/s^2 and h = 5 m: substituting into the equation, we find

U=(2 kg)(9.8 m/s^2)(5 m)=98 J


2) Work done by gravity: 98 J

The work done by a force is given by:

W=Fd cos \theta

where

F is the magnitude of the force

d is the displacement of the object

\theta is the angle between the direction of the force and the displacement

In this problem:

F=mg=(2 kg)(9.8 m/s^2)=19.6 N

d = 5 m

\theta=0^{\circ}

Therefore,

W=(19.6 N)(5 m)(cos 0^{\circ})=98 J

5 0
3 years ago
A 50.0kg box is being pushed along a horizontal surface by a force of 250N directed 28 degrees below the horizontal. The coeffic
tester [92]
The answer is c. that was a tough question
5 0
3 years ago
What is the radius of a hemisphere with a volume of 61326 ft^3
Klio2033 [76]
Calculator soup says the answer is 30.82
7 0
3 years ago
Select the correct answer.
kupik [55]

Answer:

A. Energy is lost when machines don't work right.

Explanation:

Energy cannot be created nor destroyed, according to the Law of Conservation of Energy.

4 0
3 years ago
A 2-kg box is pushed by a force of 4 N for 2 seconds. It has an initial velocity vo = 2 m/s to the right. NOTE: Since this probl
IRISSAK [1]

Answer:

Kf= 36 J

W(net) = 32 J

Explanation:

Given that

m = 2 kg

F= 4 N

t= 2 s

Initial velocity ,u= 2 m/s

We know that rate of change of linear momentum is called force.

F= dP/dt

F.t = ΔP

ΔP = Pf - Pi

ΔP = m v  - m u

v= Final velocity

By putting the values

4 x 2 = 2 ( v - 2)

8 =  2 ( v - 2)

4 = v - 2

v= 6 m/s

The final kinetic energy Kf

Kf= 1/2 m v²

Kf= 0.5 x 2 x 6²

Kf= 36 J

Initial kinetic energy Ki

Ki = 1/2 m u²

Ki= 0.5 x 2 x 2²

Ki = 4 J

We know that net work is equal to the change in kinetic energy

W(net) = Kf - Ki

W(net) = 36 - 4

W(net) = 32 J

7 0
3 years ago
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