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agasfer [191]
3 years ago
9

9. A sailor pulls a boat along a dock using a rope at an angle of 60.0° with the

Physics
1 answer:
aleksklad [387]3 years ago
6 0

Answer: (1) 3.83x10^3 J

Explanation:

(1) Fx=(255N)cos60°

   dx=30.0m

   w=Fx dx =(255)(cos60°)(30.0m)

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A rock is projected from the edge of the top of a building with an initial velocity of 12.2 m/s at an angle of 73° above the hor
Brrunno [24]

Answer:

7 s

Explanation:

u = Initial velocity of rock = 12.2 m/s

\theta = Angle of throw = 73^{\circ}

x = Displacement in x direction = 25 m

Displacement in x direction is given by

x=u\cos\theta t\\\Rightarrow t=\dfrac{x}{u\cos\theta}\\\Rightarrow t=\dfrac{25}{12.2\times \cos73^{\circ}}\\\Rightarrow t=7\ \text{s}

Time taken to reach the ground is 7 s.

4 0
3 years ago
The white dwarf that remains when our sun dies will be mostly made of
expeople1 [14]

Answer:

Carbon and oxygen

Explanation:

White dwarfs are the stars which have used all their hydrogen and helium fuel and now exists with only carbon and oxygen in their core. Their size reduces up to one hundredth times of the size of their sun in early stages and yet they possess the same mass.  

Due to loss of fuels and impact of gravity, a young star collapses on itself leading to formation of dwarf star.

 

7 0
3 years ago
I takes you 42 minutes to travel 32 miles to Ann Arbor. What was your<br> speed getting there?
frez [133]

Answer: 45.71 mi/h

Explanation:

Speed S is defined a:

S=\frac{d}{t}

Where:

d=32 miles is the traveled distance

t=42 min \frac{1 h}{60 min}=0.7 h is the time

Solving:

S=\frac{32 miles}{0.7 h}

S=45.71 mi/h This is the speed

3 0
4 years ago
When one tectonic plate moves underneath another, what is occurring?
alexdok [17]
The answer is A. subduction
7 0
3 years ago
Which of the following statements is NOT correct about sea breezes?
Andrews [41]
I think the correct answer is B.
3 0
3 years ago
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