Organ systems are groups of organs that do not carry out similar<br> functions <br> True<br> False

A ball of mass of 0.5kg is dropped from a height of 2m.

erastovalidia [21]

Answer:

6.3m/s

Explanation:

Given parameters:

Mass of the ball = 0.5kg

Height = 2m

Unknown:

Velocity when the ball hits the ground = ?

Solution:

Since the potential energy is transformed into kinetic energy;

P.E = K.E

mgh = $\frac{1}{2}$ m v²

cancelling m;

gh = $\frac{1}{2}$ v²

v² = 2gh

v = √2gh

Insert the parameters and solve;

v = √2gh = √ 2 x 9.8 x 2 = 6.3m/s

3 0

2 years ago

A metal ring 5.00 cm in diameter is placed between the north and south poles of large magnets with the plane of its area perpend

labwork [276]

Answer:

Ein: 2.75*10^-3 N/C

Explanation:

The induced electric field can be calculated by using the following path integral:

$\int E_{in} dl=-\frac{\Phi_B}{dt}$

Where:

dl: diferencial of circumference of the ring

circumference of the ring = 2πr = 2π(5.00/2)=15.70cm = 0.157 m

ФB: magnetic flux = AB (A: area of the loop = πr^2 = 1.96*10^-3 m^2)

The electric field is always parallel to the dl vector. Then you have:

$E_{in}\int dl=E_{in}(2\pi r)=E_{in}(0.157m)$

Next, you take into account that the area of the ring is constant and that dB/dt = - 0.220T/s. Thus, you obtain:

$E_{in}(0.157m)=-A\frac{dB}{dt}=-(1.96*10^{-3}m^2)(-0.220T/s)=4.31*10^{-4}m^2T/s\\\\E_{in}=\frac{4.31*10^{-4}m^2T/s}{0.157m}=2.75*10^{-3}\frac{N}{C}$

hence, the induced electric field is 2.75*10^-3 N/C

8 0

2 years ago

To regulate the intensity of light reaching our retinas, our pupils1 change diameter anywhere from 2 mm in bright light to 8 1 T

Ronch [10]

Correct question is;

To regulate the intensity of light reaching our retinas, our pupils1 change diameter anywhere from 2 mm in bright light to 8 mm in dim light. Find the angular resolution of the eye for 550 nm wavelength light at those extremes. In which light can you see more sharply, dim or bright?

Answer:

We'll see more sharply in dim light

Explanation:

If we consider diffraction through a circular aperture, then angular resolution is given by;

θ = 1.22λ/D

where:

θ is the angular resolution (radians) λ is the wavelength of light

D is the diameter of the lens' aperture.

Thus,

at diameter = 2mm = 2 x 10^(-3) m = 2 x 10^(6) nm

θ = (1.22 * 550)/(2 x 10^(6))

θ = 335.5 x 10^(-6) radians

Now, we need to convert this to arc seconds.

Thus;

1 arc second = 4.85 x 10^(-6) radians

So,θ = 335.5 x 10^(-6) radians = [335.5 x 10^(-6)]/[4.85 x 10^(-6)]

= 69.18 arc seconds

at diameter = 8mm = 8 x 10^(-3) m = 8 x 10^(6) nm

θ = (1.22 * 550)/(8 x 10^(6))

θ = 83.875 x 10^(-6) radians

Now, we need to convert this to arc seconds.

Thus;

1 arc second = 4.85 x 10^(-6) radians

So,θ = 83.875 x 10^(-6) radians = [83.875 x 10^(-6)]/[4.85 x 10^(-6)]

= 17.3 arc seconds

From the values of angular resolution gotten, we see that sharpness of image increases with increasing angular resolution. Thus, objects are sharper in dim light.

4 0

3 years ago

What is always coming, but never arrives?

nataly862011 [7]

Answer:Tommorow

Explanation:

4 0

3 years ago

Read 2 more answers

True/False: The core, mantle, and crust explanation for the Earth's layers is outdated and now we use the 5 layer explanation. *

nekit [7.7K]

Answer:

False

Explanation:

We still use the old way. It's easier to understand the old way, and its NOT outdated.

3 0

3 years ago

Organ systems are groups of organs that do not carry out similar functions True False