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3 years ago

15

I am going to build a boat. My partner says I cannot put a refrigerator and a television in my boat because that would make it t

oo heavy-and the boat might sink. Then we would be swimming with the sharks!!!!
What would you advise me to tell my friend? Is she right or wrong?
please help me...ill give out brainlyest

1 answer:

krok68 [10]3 years ago

3 0

Answer:

In mine I said to build the boat accordingly based on what is going to be in it

Explanation:

just remember the density of the boat cannot change but the volume and the mass can

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How are you going to describe the amount of force acting in the given situation?

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Answer:

fully describe the force acting upon an object, you must describe both the magnitude (size or numerical value) and the direction. ... In contrast, 10 Newton, downward is a complete description of the force acting upon an object; both the magnitude (10 Newton) and the direction (downward) are given.

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3 years ago

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Race: Blythe and Geoff compete in a 1-km race. Blythe’s strategy is to run the first 600 m of the race at a constant speed of 4

Masteriza [31]

Answer:

From the value of each person's time to finish the race, it can be concluded that Geoff will win the race.

Explanation:

Given;

total distance to be covered, d = 1000 m

first distance covered by Blythe, $d_b_1$ = 600 m

constant speed of Blythe at the first stage, $v_b_1$ = 4 m/s

final speed of Blythe, $v_b_f$ = 7.5 m/s

time of Blythe's constant acceleration, $t$ = 1 min = 60 s

initial speed of Geoff, $v_g_1$ = 0

final speed of Geoff, $v_g_f$ = 8 m/s

time of Blythe's constant acceleration, $t$ = 3 min = 180 s

The acceleration of Blythe is given as;

$a_b = \frac{dv}{dt} = \frac{7.5 - 4}{60} = 0.0583 \ m/s^2$

distance covered by Blythe during this acceleration is given as;

$d_{a_b} = v_b_1t + \frac{1}{2} a_b t^2\\\\d_{a_b} = 4*60 + \frac{1}{2}(0.0583) (60)^2\\\\d_{a_b} = 344.94 \ m$

The remaining distance covered by 7.5 m/s is given as;

$d_f = d - (600 + 344.94)\\\\d_f = 1000- (944.94)\\\\d_f = 55.06 \ m$

The total time for Blythe to covere the entire distance = time taken to cover 600 m + time taken to cover 344.94 m + time taken to cover 55.06 m

$t_b = \frac{600 \ m}{4 \ m/s}\ +\ 60 s \ + \ \frac{55.06 \ m}{7.5 \ m/s} \\\\t_b = 150 s \ + \ 60s \ + \ 7.34 s\\\\t_b = 217.34 s$

The acceleration of Geoff is given as;

$a_g = \frac{dv}{dt} = \frac{8 -0}{180} = 0.044 \ m/s^2$

distance covered by Geoff during this acceleration is given as;

$d_{a_g} = v_g_1 + \frac{1}{2}a_gt^2\\\\ d_{a_g} =0 + \frac{1}{2}(0.044)(180)^2\\\\ d_{a_g} = 712.8 \ m$

The remaining distance covered by 8 m/s is given a;

$d_f = 1000 \ m - 712.8 \ m\\\\d_f = 287.2 \ m$

The total time for Geoff to covere the entire distance = time taken to cover 712.8 m + time taken to cover 287.2 m

$t_g = 180s + \frac{287.2 \ m}{8 \ m/s} \\\\t_g = 180s + 35.9 s\\\\t_g = 215.9 s$

Therefore, from the value of each person's time to finish the race, it can be concluded that Geoff will win the race

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We spend our lives in visible light without risks to our health. Yet exposure to UV waves in sunlight can cause skin cancer. Wha

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4 years ago

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Answer:

A. attract each other

Explanation:

When the neutral sphere is brought close to the negatively charged, as charges can move freely in a conductor, some electrons will be repelled, leaving a net positive charge (equal in magnitude ot the charge in the other sphere) on the surface of the neutral sphere, which will cause that both spheres attract each other.

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4 years ago

A student of weight 652 N rides a steadily rotating Ferris wheel (the student sits upright). At the highest point, the magnitude

miskamm [114]

Answer:

Explanation:

Given

Weight of person $W=652\ N$

At highest point Magnitude of the normal force $F=585\ N$

net force at highest point

$F_{net}=W+F_c$

where $F_c=$ centripetal force

$F_c=\dfrac{mv^2}{r}$

$F_{net}=F_{n}=$ Normal Force

$585=652+F_c$

$F_c=-67\ N$

Negative sign shows force is in upward direction

At bottom point centripetal force is towards the bottom

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$F_n=652+67$

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