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MAXImum [283]
3 years ago
10

20 POINTS!!!!!!!!

Physics
2 answers:
marta [7]3 years ago
8 0

Answer: The answer is B :) !

Explanation:

You will get it correct loves !

emmainna [20.7K]3 years ago
6 0

Answer: C

Explanation:

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Which equation is used to determine the density of a substance?
Mademuasel [1]
The answer is D=M/V hope it helps!!
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3 years ago
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In the sport of parasailing, a person is attached to a rope being pulled by a boat while hanging from a parachute-like sail. A r
IrinaK [193]

Answer:

570 N

Explanation:

Draw a free body diagram on the rider.  There are three forces: tension force 15° below the horizontal, drag force 30° above the horizontal, and weight downwards.

The rider is moving at constant speed, so acceleration is 0.

Sum of the forces in the x direction:

∑F = ma

F cos 30° - T cos 15° = 0

F = T cos 15° / cos 30°

Sum of the forces in the y direction:

∑F = ma

F sin 30° - W - T sin 15° = 0

W = F sin 30° - T sin 15°

Substituting:

W = (T cos 15° / cos 30°) sin 30° - T sin 15°

W = T cos 15° tan 30° - T sin 15°

W = T (cos 15° tan 30° - sin 15°)

Given T = 1900 N:

W = 1900 (cos 15° tan 30° - sin 15°)

W = 570 N

The rider weighs 570 N (which is about the same as 130 lb).

6 0
3 years ago
Define the physics quantity of work
umka2103 [35]

Explanation:

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F is the force applied

d is the displacement

Ф is the angle

 The unit of work done is in Joules.

5 0
3 years ago
you can make a smoothie in a blender with a power of 400 W and an efficiency of 85% how much energy is actually being used to ma
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A stream begins at an elevation of 1000 feet and flows a distance of 200 miles to the ocean. what is the average gradient?
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