If a pitcher throws a baseball 10 m in 30 seconds - what would be the average speed of the baseball

A 85.0kg man and a 65, 0kg woman are riding a Ferris wheel with a radius of 20.0m. What is the Ferris wheels tangential velocity

zvonat [6]

Answer:

The Ferris wheel's tangential (linear) velocity if the net centripetal force on the woman is 115 N is 3.92 m/s.

Explanation:

Let's use Newton's 2nd Law to help solve this problem.

F = ma

The force acting on the Ferris wheel is the centripetal force, given in the problem: $F_c=115 \ \text{N}$ .

The mass "m" is the sum of the man and woman's masses: $85+65= 150 \ \text{kg}$ .

The acceleration is the centripetal acceleration of the Ferris wheel: $a_c=\displaystyle \frac{v^2}{r}$ .

Let's write an equation and solve for "v", the tangential (linear) acceleration.

$\displaystyle 115=m(\frac{v^2}{r} )$
$\displaystyle 115 = (85+65)(\frac{v^2}{20})$
$\displaystyle 115=150(\frac{v^2}{20} )$
$.766667=\displaystyle(\frac{v^2}{20} )$
$15.\overline{3}=v^2$
$v=3.9158$

The Ferris wheel's tangential velocity is 3.92 m/s.

8 0

2 years ago

The elements carbon, nitrogen, and oxygen are'll part of the same _____ on the periodic table?

andreev551 [17]

C, N and O all belong to the same period, in which it's 2nd Period.

4 0

4 years ago

Read 2 more answers

What is the refractive index of the plastic?

Katena32 [7]

Most plastics have refractive indices in the range from 1.3 to 1.7, but some high-refractive-index polymers can have values as high as 1.76. For infrared light refractive indices can be considerably higher. Germanium is transparent in the wavelength region from 2 to 14 µm and has a refractive index of about 4.

8 0

4 years ago

Infrared rays have a shorter wavelength than

Rus_ich [418]

Answer:

Microwaves and radio waves

Explanation:

The electromagnetic spectrum is the classification of the electromagnetic waves according to their wavelength.

From shortest to longest wavelength, they are classified as follows:

Gamma rays < 6 pm

X-rays 6 pm - 10 nm

Ultraviolet 10 nm - 380 nm

Visible light 380 nm - 750 nm

Infrared radiation $750 nm - 5 \mu m$

Microwaves $5 \mu m -0.3 m$

Radio waves > 0.3 m

From the list, we see that infrared rays have shorter wavelength than microwaves and radiowaves.

6 0

3 years ago

In a hydroelectric power plant, 65 m3 /s of water flows from an elevation of 90-m to a turbine-generator, where electricity is g

Mariulka [41]

The electric output of the plant is 48.19 MW

First we need to calculate the water power, it is given by the formula

WP=ρQgh

Here, ρ=1000 kg/m3 is density of water,Q is the flow rate, g is the gravity, and h is the water head

Therefore, WP=1000*65*9.81*90=57388500 W=57.38 MW

Now the overall efficiency of the hydroelectric power plant is given as

η= $\frac{electric power}{water power}$

Plugging the values in the above equation

0.84=EP/57.38

EP=48.19 MW

Therefore, the electric output of the plant is 48.19 MW.

3 0

3 years ago