PHYSICS MIDDLE SCHOOL

I have a question and no one has helped me yet so I'm re-submitting it. thanks in advance. ​
I have a question and no one has helped me - 1

Answers

Answer 1
Answer:

Apply this kinematics equation for the particle's vertical motion:

D = Vt + 0.5At²

D = vertical distance traveled, t = time, V = initial vertical velocity, A = vertical acceleration

Given values:

D = 49m

V = 34.3m/s

A = -9.81m/s²

Plug in and solve for t:

49 = 34.3t - 4.905t²

4.905t² - 34.3t + 49 = 0

Use the quadratic roots formula to find the values of t:

t ≈ 2, 5

The particle reaches a height of 49m at t = 2s & t = 5s

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Find the equivalent resistance in the circuit between A and B ​

Answers

Answer:

6Ω

Explanation:

The 6Ω resistor and the 3Ω resistor are in parallel.

R = 1 / (1/6 + 1/3)

R = 1 / (1/6 + 2/6)

R = 1 / (3/6)

R = 6/3

R = 2

The 8Ω resistor and the other 8Ω resistor are also in parallel.

R = 1 / (1/8 + 1/8)

R = 1 / (2/8)

R = 8/2

R = 4

This 4Ω resistance is in series with the 4Ω resistor.

R = 4 + 4

R = 8

The 2Ω resistor and the 6Ω resistor are also in series.

R = 2 + 6

R = 8

These two 8Ω resistances are in parallel.

R = 1 / (1/8 + 1/8)

R = 1 / (2/8)

R = 8/2

R = 4

Finally, this 4Ω resistance is in series with the 2Ω resistance we found earlier.

R = 4 + 2

R = 6

The total equivalent resistance is 6Ω.

If the angular displacement= 3t²+2t,find the angular velocity and angular acceleration​

Answers

Hi there!

The angular velocity is equivalent to:

\omega(t) = \theta'(t) = (d\theta)/(dt)

Take the derivative using the power rule:

w(t) = (d\theta)/(dt) = \boxed{6t + 2}

The angular acceleration is equivalent to:

\alpha(t) = (d\omega)/(dt)

Differentiate once again:

\boxed{\alpha(t) = 6}

Answer:

SORRY IDK BUT THX

Explanation:

The chemical formula for water, H2O, means that each water molecule contains

Answers

2 hydrogen molecules and one oxygen molecule

To calculate power, divide the amount of energy transferred by _____________

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Power is defined in physics as the quantity of energy transported or transformed per unit of time. To calculate power, divide the amount of energy transferred by time.

What is power?

Power is defined in physics as the quantity of energy transported or transformed per unit of time. The watt is the unit of power in the International System of Units, equivalent to one joule per second. Power is also referred to as activity in ancient writings. A scalar quantity is a power.

The formula for power is given as the ratio of energy transferred to the time taken.

Its SI unit is Watt, while the SI units for energy and time are seconds. Therefore, we can write,

Power = Energy transfer / Time taken

Joule = Watt / Second

Hence, To calculate power, divide the amount of energy transferred by time.

Learn more about Power here:

brainly.com/question/2289248

#SPJ2
P = E/t
where P is power, t is time in seconds and E is energy in joules

(b) Lorna then built a different circuit as shown below. How could Lorna get both bulbs to light at the same time in this circuit?

Answers

Lorna should close the switches S3 and S4,and leave them closed.
Then, both bulbs are controlled by S5. 
When it's closed, they both light. When it's open, they're both off (dark).

The flat area surrounding the mouth of the Mississippi River is covered with rich sediments important to farming in this area. These sediments are deposited at a rate of 80,000 tons per year. This area surrounding Mississippi River is called the

Answers

Answer:

A) Delta.

Explanation:

The options of this question are the next ones:

A) delta. B) plains. C) plateau. D) low lands.

The flat area surrounding the mouth of the mississippi river is known as Delta, or the Delta Basin of the Mississippi river, and the entire area was formed over the curse of 5,000 years by the deposition when the sediments are being put into this delta.

commonly referred to as the Mississippi River DELTA. technically, it's an estuary.
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