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crimeas [40]
2 years ago
10

A circuit connected to a battery of 1.9 voltage. has a current of 0.07 amps. What is the resistance

Physics
1 answer:
alexandr402 [8]2 years ago
5 0

Answer:

27.14 ohms

Explanation:

V = IR

V/I  = R

1.9 v / .07 a = 27.14 ohms

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If a system has 225 kcal of work done to it, and releases 5.00 × 102 kj of heat into its surroundings, what is the change in int
vovikov84 [41]

We can solve the problem by using the first law of thermodynamics:

\Delta U = Q-W

where

\Delta U is the change in internal energy of the system

Q is the heat absorbed by the system

W is the work done by the system on the surrounding


In this problem, the work done by the system is

W=-225 kcal=-941.4 kJ

with a negative sign because the work is done by the surrounding on the system, while the heat absorbed is

Q=-5 \cdot 10^2 kJ=-500 kJ

with a negative sign as well because it is released by the system.


Therefore, by using the initial equation, we find

\Delta U=Q-W=-500 kJ+941.4 kJ=441.4 kJ

8 0
3 years ago
The free body diagram shows a box being pulled to the left up a 25-degree incline
Greeley [361]
The question is incomplete but still I answer to assume your thinking.
The picture is attached below!.
Here,
F is the force with which you pull up the incline.
N is the normal force.
w is the weight acting downward.
Axis are mentioned in the attached picture.
Concept:
You can see there is no movement of object in the y-direction that means acceleration is zero in y-direction, sum of all the forces in y-direction equal to zero.
According to newton second law,
<span>∑ F = ma
</span>As, acceleration is zero in y-direction, so right hand side is zero in the above equation.
<span>∑ F = 0</span>
N-wcosθ=0 
N= m*g*cos25°
N= m*(9.8)*(0.9063)
N= 8.8817*m
By putting the value of mass(m)(not given in the question) you will get the answer.
Hopefully, this is the answer of your question.


5 0
3 years ago
Read 2 more answers
Speed is different from velocity because
shtirl [24]

Answer:

A. velocity has a direction .. .

with magnitude too but speed has only magnitude

6 0
2 years ago
Read 2 more answers
The image above was taken by the spacecraft Messenger as it flew by the planet Mercury. The terrain shown in this image is typic
lorasvet [3.4K]
The answer is

C


Hope this helps
7 0
3 years ago
One of the fastest recorded pitches major-league baseball, thrown by nolan ryan in 1974, was clocked at 100.8 mi/hr. If a pitch
lawyer [7]

<u>Answer:</u>

 The ball fall vertically 2.69 ft by the time it reached home plate 60.0 ft away.

<u>Explanation:</u>

    Fastest recorded pitches major-league baseball, thrown by nolan ryan in 1974 = 100.8 mi/hr = 44.8 m/s

    The horizontal distance to home plate = 60.0 ft = 18.288 m

  We have the horizontal velocity = 44.8 m/s

    So time taken = 18.288/44.8 = 0.408 seconds.

  The distance traveled by baseball vertically is found out by equation s=ut+\frac{1}{2} at^2

  Here u =0m/s, a = 9.81 m/s^2 and t = 0.408 s

 Substituting

     S = 0*0.408+\frac{1}{2} *9.81*0.408^2 = 0.82 m\\ \\S = 0.82 m= 2.69 ft

So vertical distance traveled = 0.82 m = 2.69 ft

7 0
2 years ago
Read 2 more answers
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