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Luba_88 [7]
3 years ago
15

1) At which lettered point or points is the object moving the fastest?

Physics
1 answer:
emmainna [20.7K]3 years ago
8 0

Here we have a time-position graph with some points marked on it, and we want to analyze some points in it.

1) The object is moving the fastest in the point where the slope of the curve is the largest.

In this case, the point is D.

2) Remember that the graph evolves to the right, so, if at any point, the right side is above the left side, then at that particular point the object is moving to the left (negative x-axis)

In this case, the points are:

C, D, and E.

3) The object speeds up when the curvature of the curve changes and the slope increases, for example, from B onwards, the speed increases.

Then at point C the speed is increasing.

4) Opposite to what we said before, if the slope decreases then the object is slowing down.

In this case we can see that the slope decreases after A and after E.

5) When the object is turning around?

This is easy, we can see that the object goes to the right (positive x-axis) until it reaches B and then goes back, then at point B the object turns around.

If you want to learn more, you can read:

brainly.com/question/11290689

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Please Help me in this question..​
Vlad [161]

Answer:

1 different

Explanation:

2 light

3 sunny

4 a shadow

5dark

<h2 />
8 0
3 years ago
power of a crane is 25000 watt calculate the time required by it to lift a load of 6000 kg up tp the height of 20 m​
saul85 [17]
Solution:

We have,

Power [P] = 25000 Watt

Mass [m] = 6000 kg

Height [h] = 20 metres

Time [t] = ?

Now,

P = W/t = F x d/t = mxgx h/t

Or, 25000 = 6000 x 10 x 20/25000 [.......g = 10

m/s^2]

Or, t = 6000 x 10 x 20/25000

Or, t = 1200/25

Therefore, t = 48 second

Hence, the required time for the crane to lift the load is 48 seconds.
8 0
3 years ago
A curve of radius 53.1 m is banked so that a car of mass 2.9 Mg traveling with uniform speed 67 km/hr can round the curve withou
prisoha [69]

Answer:

33.65°

Explanation:

radius, r = 53.1 m

m = 2.9 Mg = 2.9 x 10^6 g = 2900 kg

v = 67 km/h

convert km/h into m/s

v = 18.61 m/s

Let the angle of banking of road is θ, without friction

tan\theta =\frac{v^{2}}{rg}

tan\theta =\frac{18.61^{2}}{53.1\times 9.8}

tan  θ = 0.6655

θ = 33.65°

Thus, the angle of banking of road is 33.65°.

6 0
3 years ago
Hiện tượng lọc và siêu lọc
STALIN [3.7K]

Answer:

Siêu lọc (UF) là một dạng lọc màng trong đó các lực như áp suất hoặc gradient nồng độ được phân tách thông qua một màng bán thấm. Chất rắn lơ lửng và chất tan có trọng lượng phân tử cao được giữ lại trong cái gọi là retentate, trong khi nước và chất tan có trọng lượng phân tử thấp đi qua màng trong quá trình thẩm thấu (lọc). Quá trình tách này được sử dụng trong công nghiệp và nghiên cứu để tinh chế và cô đặc các dung dịch cao phân tử (103 106 Da), đặc biệt là các dung dịch protein.

Siêu lọc về cơ bản không khác gì vi lọc. Hai điều này khác nhau trên cơ sở loại trừ kích thước hoặc bắt giữ hạt. Điều này về cơ bản khác với sự phân tách khí qua màng, dựa trên tốc độ hấp thụ và khuếch tán khác nhau với số lượng khác nhau. Màng siêu lọc được xác định bằng trọng lượng phân tử (MWCO) của màng được sử dụng. Siêu lọc được thực hiện ở chế độ dòng chảy chéo hoặc dòng chết.

7 0
3 years ago
If you swim from one point at the edge of the pool to another, along a straight line, what is the longest distance d you can swi
densk [106]

The longest distance that a person can swim is 5.64 m.

<h3>What is the longest distance?</h3>

We know that the diameter of a circle is a line that is drawn from one point to another in the circle. Now we are told that the pool is circular in nature. That implies that the longest that a person can swim could be obtained form the diameter of the circle.

Given that;

A =  πr^2

A = area of teh circular pool

r  = radius of the pool

r = √A/ π

r = √25/3.142

r = 2.82m

Diameter of the circular pool = 2 r = 2 (2.82 cm) = 5.64 m

Learn more about circle:brainly.com/question/11833983

#SPJ1

Missing parts;

An ad for an above-ground pool states that it is 25 m2. From the ad, you can tell that the pool is a circle. If you swim from one point at the edge of the pool to another, along a straight line, what is the longest distance d you can swim? Express your answer in three significant figures.

4 0
2 years ago
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