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3 years ago

UI TU

Physics

1 answer:

tatyana61 [14]3 years ago

6 0

Answer:

$v=11000\frac{m}{s}$

Explanation:

Momentum (p) is defined as the product of the mass of an object times its velocity: $p=m*v$

Since we are given the value of the momentum, and the value of the mass of the space probe, we use those in the above formula to solve for he unknown velocity:

$p=m*v\\1100000 kg*\frac{m}{s} = 100kg*v\\\frac{1100000}{100} \frac{m}{s} = v\\11000\frac{m}{s} = v$

Therefore the velocity of the probe is 11000 meters per second.

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Lars is standing near the edge of a 90-meter cliff. He throws a ball upward, but does not catch it, and it falls to the bottom o

Kipish [7]

Answer:

c. 43 m/s

Explanation:

Given the following data;

Displacement, S = 90 meters

Time, t = 5.55 seconds

To find the initial velocity;

We would use the second equation of motion given by the formula;

$S = ut + \frac {1}{2}at^{2}$

Where;

S represents the displacement or height measured in meters.

u represents the initial velocity measured in meters per seconds.

t represents the time measured in seconds.

a represents acceleration measured in meters per seconds square.

We know that acceleration due to gravity is -9.8m/s² because the direction is downward.

Substituting into the equation, we have;

$90 = u*5.55 + \frac {1}{2}*(-9.8)*5.55^{2}$

$90 = u5.55 - 4.9*30.8025$

$90 = u5.55 - 150.93225$

Rearranging the equation, we have;

$u5.55 = 90 + 150.93225$

$u5.55 = 240.93225$

$u = \frac {240.93225}{5.55}$

Initial velocity, u = 43.41 ≈ 41 m/s

4 0

3 years ago

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VladimirAG [237]

Answer:

Explanation:

Because both the elements are non-metals

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3 years ago

Waves travel along a 100-m length of string which has a mass of 55 g and is held taut with a tension of 75 N. What is the speed

Dvinal [7]

Answer:

$v=369.27\frac{m}{s}$

Explanation:

The speed of the waves in a string is related with the tension and mass per unit length of the string, as follows:

$v=\sqrt\frac{T}{\mu}$

First, we calculate the mass per unit length:

$\mu=\frac{m}{L}\\\mu=\frac{55*10^{-3}kg}{100m}\\\mu=5.5*10^{-4}\frac{kg}{m}$

Now, we calculate the speed of the waves:

$v=\sqrt\frac{75N}{5.5*10^{-4}\frac{kg}{m}}\\v=369.27\frac{m}{s}$

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3 years ago

When neither plate is dense enough to sink into the asthenosphere, the result is a _____ plate boundary.

hjlf

Answer: Convergent collision

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3 years ago

A car is traveling to the right at constant speed along a flat, horizontal road. Its four tires are all the same size and are ro

MaRussiya [10]

Answer:

C. the bottom

Explanation:

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