What is the kinetic energy of a 16g billiard ball moving at 2.5 m/s?

To qualify to run in the 2005 boston marathon, a distance of 26.2 miles, an 18-year-old woman had to have completed another mara

oksian1 [2.3K]

3 hours and 40 minutes is equivalent to 3.667 hours. If a woman must have run another marathon (of 26.2 miles) within that time, then her minimum average speed in mph can be calculated by dividing the distance by time:
26.2 miles / 3.667 hours = 7.145 miles per hour

5 0

3 years ago

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Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed, with a mean

Reptile [31]

Answer: 56994 miles

Explanation:

Given : Toby's Trucking Company determined that on an annual basis, the distance traveled per truck is normally distributed with

$\mu=50,000\text{ miles}$

Standard deviation : $\sigma=12,000\text{ miles}$

Let a be the distance traveled by at least 72% of the trucks.

Let X be the random variable that represents the distance traveled by a truck

Then $P(x\geq a)=0.72$

The critical value corresponds to p-value 0.72 : $z=0.5828415$

Also, $z=\dfrac{x-\mu}{\sigma}$

$\Rightarrow\ 0.5828415=\dfrac{a-50000}{12000}\\\\\Rightarrow\ a=12000(0.5828415)+50000=56994.098\approx56994$

Hence, 56994 miles will be traveled by at least (equal to and more than) 72% of the trucks .

6 0

3 years ago

If the mass of a material is 120 grams and the volume of the material is 23 cm3, what would the density of the material be?

oee [108]

The density is 5.22 g/cm³.

Density= $\frac{mass}{volume}$
Density= $\frac{120 g}{23 cm {3} }$
Density= 5.22 g/cm³

4 0

3 years ago

Spaceship 1 and spaceship 2 have equal masses of 150kg. Spaceship 1 has the speed of 0 m/s and spaceship 2 has a speed of 6 m/s.

Anna11 [10]

Answer:

3 m/s

Explanation:

The computation of speed is shown below:-

We will compute the equation by using the law of conservation of momentum; also, the total momentum prior and following the collision must be conserved. Therefore we can write the equation is the following manner:-

$m_1 u_1 + m_2 u_2 = (m_1 +m_2)v$

where the symbols represent

150 kg is the mass of spaceship 1 = m1

150 kg is the mass of spaceship 2 = m2

0 m/s is the initial velocity of spaceship 1 = u1

6 m/s is the initial velocity of spaceship 2 = u2

and v is the velocity of the 2 ships so that they can collide and combined together

For v we will get the following equation to reach the speed

$v=\frac{m_1 u_1 + m_2 u_2}{m_1+m_2}$

$=\frac{0+(150)(6)}{150+150}$

$=3 m/s$

5 0

3 years ago

Which of the following statements is true about the variation of pressure in function of the depth? O Pressure decreases exponen

mrs_skeptik [129]

Answer:

The answer is: Pressure increases linearly with the depth

Explanation:

In this case, the definition of pressure is:

$P = \frac{F}{A}$

where F = mg is the weight of the fluid over the body, and A is the area of the surface to which the force is exerted. If we consider $\rho = m/V$ , then

$P = \frac{mg}{A} = \frac{\rho Vg}{A}$ .

Volume can be expressed as V = A*h, where A is the cross section of the column of the fluid over the body and h is the height of the column, in other words, the depth.

So

$P = \frac{A\rho gh}{A}= \rho g h$ ,

which means that pressure increases linearly with the depth in a factor of $\rho g$ .

5 0

3 years ago

What is the kinetic energy of a 16g billiard ball moving at 2.5 m/s?​

What is the kinetic energy of a 16g billiard ball moving at 2.5 m/s?