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valkas [14]
3 years ago
9

Date:

Physics
1 answer:
tia_tia [17]3 years ago
4 0

Answer:

don't know I just want point for answers

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PLEASE HELP!! Salmon often jump waterfalls to reach their
AlexFokin [52]

Answer:

7.13781 m/s

Explanation:

X-direction             | Y-direction

x=v_{xo}t+\frac{1}{2}a_{x}t^2      | y=v_{yo}t+\frac{1}{2}a_{y}t^2

3.41=v_{o}cos(28.4)t  | 0.397=v_{yo}sin(28.4)t+\frac{1}{2} (-9.81)t^2

3.41=v_{o}(0.87964)t  | 0.397=v_{yo}sin(28.4)(\frac{3.87658}{v_{o} })+\frac{1}{2} (-9.81)(\frac{3.87658}{v_{o} })^2

\frac{3.41}{0.87964}=v_{o}t             | 0.397=1.84379-\frac{73.71171}{v^2}

\frac{3.87658}{v_{o} } =t                | 7.13781=v

8 0
3 years ago
Explain the meaning of the name "black hole". This should be 2-3 sentences. Hint- relate this to density and how it effects thin
Rina8888 [55]
A black hole is a very dense, massive, body, left behind after a large star explodes. It has a huge gravity which will attract everything that comes near it, even light!
8 0
3 years ago
A 72 kg skydiver is descending on a parachute. His speed is still increasing at 1.2 m/s2. What are the magnitude and direction o
frozen [14]

Answer:

86.4 N downward

Explanation:

Force: This can be defined as the product of mass and acceleration of a body.

The S.I unit of Force is Newton(N).

The Expression of force is given as,

F = ma ................ Equation 1

Where F = force of the parachute harness, m = mass of the skydiver, a = acceleration of the skydiver.

Given: m = 72 kg, a = 1.2 m/s²

Substitute into equation 1

F = 72(1.2)

F = 86.4 N down ward.

Hence the force on the parachute harness = 86.4 N downward

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3 years ago
HELP 50 POINTS
Inga [223]

Answer:

A

Explanation:

When you pull the string the weight will experience a downward force and come closer to the vertical tube. And the angle between weight and hand through string is decreased so the angular velocity decreases

7 0
3 years ago
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10 POINTS will mark brainliest if correct
PolarNik [594]
After putting stuff through google and some calculators, I’d say the answer is C.
6 0
4 years ago
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