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3 years ago

Pls i need help .......

Physics

1 answer:

Dmitrij [34]3 years ago

6 0

Answer:

m = 7000 - 500 = 6500 g

ρ = m/v = 6500 gm / 500 cm³ = 1.3 g/cm³

The paint brush floats because its density is less than that of the paint and has displaced its weight in the paint.

Explanation:

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(Flair?) Two species of fish live in the same pond. One species reproduces sexually, and the other reproduces asexually. One day

morpeh [17]

Answer is asexully

Explanation:

for every two sexully producing fish there is one offspring. but for every one asexuall producing fish there is one offspring. so if the asexual fish prodececes more than there will be more than the sexually producing fish.

7 0

3 years ago

Read 2 more answers

7. An engineer is using a wire that has a resistance of 1.5 . This resistance is too high for the application he is designing. T

Veronika [31]

Answer and Explanation:

We know that resistance $R=\frac{\rho l}{A}$ from the given equation of resistance it is clear that resistance depends on resistivity length and area of the material but we can not change the length because it is given that the length must be 2.5 cm long.

So we can do two two things to reduce the resistance

increase the cross sectional area
decrease the resistivity of the material

7 0

3 years ago

If an object has two forces that are equal in magnitude, but acting on it in opposite directions, what are some possible things

Oksi-84 [34.3K]

Answer: The body will be in a position of rest

Explanation:

Since both forces are equal and acting in opposite direction on the body. It will make the body to be in a state of rest or equilibrium because the sum of the forces acting in the body will be zero.

5 0

3 years ago

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

Illusion [34]

Answer:

the weight of the rider is 493.53 N

Explanation:

Given the data in the question and as illustrated in the image below,

Tension T = 1900 N

the rider is moving at a constant speed so the net force in the horizontal direction will be 0

In the horizontal direction

F $_{sail$ cos( 30° ) = Tcos ( 17° )

F $_{sail$ = Tcos( 17° ) / cos( 30° )

F $_{sail$ = 1900cos( 17° ) / cos( 30° )

F $_{sail$ = 2098.07 N

Now, In the vertical direction,

F $_{sail$ sin( 30° ) = W + T sin( 17° )

W = F $_{sail$ sin( 30° ) - T sin( 17° )

W = 2098.07sin( 30° ) - 1900sin( 17° )

W = 1049.035 - 555.506

W = 493.53 N

Therefore, the weight of the rider is 493.53 N

7 0

3 years ago

Find the equivalent resistance of this circuit

Phantasy [73]

Answer:

Req = 564 Ω

Explanation:

The equivalent resistance between R1 and R2:

1/R =1/R1 + 1/R2

1/R =1/960 + 1/640

1/R = 1/384

R = 384

Now, the equivalent resistance between R and R3:

Req = 384 + 180

Req = 564 Ω

8 0

3 years ago