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zimovet [89]
3 years ago
8

HELP NEEDED FAST (last cram sessions before finals)

Physics
1 answer:
aliina [53]3 years ago
5 0

Explanation:

The sum of the voltages of the components connected in a series circuit is equal to the voltage across the battery.

V_T = V_1 + V_2 +V_3

From Ohm's law (V=IR) and in a series circuit, the amount of current flowing through the components is the same for all. So we can write V_T as

V_T= 75\:\text{V} = I(170)+I(190) + 21\:\text{V}

I(170+190)=54\:\text{V}

I= \dfrac{54\:\text{V}}{360\:\text{ohms}}=0.15\:\text{A}

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A spacecraft on its way to Mars has small rocket engines mounted on its hull; one on its left surface and one on its back surfac
Ostrovityanka [42]

Answer:

Explanation:

Given

acceleration in x direction

a_x=5.10 m/s^2

Final velocity in x direction v_x=3500 m/s

time taken=150 s

let initial velocity in x direction be u_x

v_x=u_x+a_x\times t

3500-5.10\times 150=u_x

u_x=2735 m/s

Now solve for Y direction

v_y=u_y+a_y\times t

4046=u_y+7.3\times 150

u_y=4046-1095=2951 m/s

tan\theta =\frac{u_y}{u-x}=\frac{2951}{2735}

tan\theta =1.078

\theta =47.14 ^{\circ} ACW from x-axis

5 0
3 years ago
What equation is used to calculate momentum
Dmitrij [34]

Answer:

p = m v

Explanation:

You can see from the equation that momentum is directly proportional to the object's mass (m) and velocity (v). Therefore, the greater an object's mass or the greater its velocity, the greater its momentum. A large, fast-moving object has greater momentum than a smaller, slower object.

6 0
3 years ago
You have a 12 volt battery and placed across a 6 ohm resistor, what will the current be?​
QveST [7]

Answer:

i hope it help

Explanation:

It's possible to step 12 volts down to 6 volts by incorporating a pair of 10,000-ohm resistors into the circuit. Cut two lengths of wire, and strip each wire of 1/2 inch of insulation at each end. Attach one end of the first wire to the positive terminal on the power supply.

8 0
3 years ago
Read 2 more answers
A karate master strikes a board with an initial velocity of 10.0 m/s, decreasing to 1.0 m/s as his hand passes through the board
kenny6666 [7]

The force exerted on the board by the karate master given the data is -4500 N

<h3>Data obtained from the question </h3>
  • Initial velocity (u) = 10 m/s
  • Final velocity (v) = 1 m/s
  • Time (t) = 0.002 s
  • Mass (m) = 1 Kg
  • Force (F) = ?
<h3>How to determine the force</h3>

The force exerted can be obtained as illustrated below:

F = m(v - u) / t

F = 1 (1 - 10) / 0.002

F = (1 × -9) / 0.002

F = -4500 N

Learn more about momentum:

brainly.com/question/250648

#SPJ1

6 0
2 years ago
PHYSICS 50 POINTS PLEASE HELP
babymother [125]

Newton’s First Law of Motion - if an object is at rest, it takes un-

balanced forces to make it move. Conversely, if an object is moving

it takes an unbalanced force to make it change it’s direction or speed.

Newton was the first to see that such apparently diverse phenomena as a satellite moving near the Earth's surface and the planets orbiting the Sun operate by the same principle: Force equals mass multiplied by acceleration, or F=ma.

7 0
3 years ago
Read 2 more answers
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