Can someone please answer 5-7

kogti [31]

Answer:

meiosis is a kind of cell division which occurs in special cells like gametes in which the daughter cells have half the numbers of chromosomes than the parent cells .

hence we can say that by this cell division 2 haploid cells are formed.

7 0

2 years ago

A cannon fires a 0.2 kg shell with initial velocity vi = 9.2 m/s in the direction θ = 46 ◦ above the horizontal. The shell’s tra

Sedbober [7]

Answer:

∆h = 0.071 m

Explanation:

I rename angle (θ) = angle(α)

First we are going to write two important equations to solve this problem :

Vy(t) and y(t)

We start by decomposing the speed in the direction ''y''

$sin(\alpha) = \frac{Vyi}{Vi}$

$Vyi = Vi.sin(\alpha ) = 9.2 \frac{m}{s} .sin(46) = 6.62 \frac{m}{s}$

Vy in this problem will follow this equation =

$Vy(t) = Vyi -g.t$

where g is the gravity acceleration

$Vy(t) = Vyi - g.t= 6.62 \frac{m}{s} - (9.8\frac{m}{s^{2} }) .t$

This is equation (1)

For Y(t) :

$Y(t)=Yi+Vyi.t-\frac{g.t^{2} }{2}$

We suppose yi = 0

$Y(t) = Yi +Vyi.t-\frac{g.t^{2} }{2} = 6.62 \frac{m}{s} .t- 4.9\frac{m}{s^{2} } .t^{2}$

This is equation (2)

We need the time in which Vy = 0 m/s so we use (1)

$Vy (t) = 0\\0=6.62 \frac{m}{s} - 9.8 \frac{m}{s^{2} } .t\\t= 0.675 s$

So in t = 0.675 s → Vy = 0. Now we calculate the y in which this happen using (2)

$Y(0.675s) = 6.62\frac{m}{s}.(0.675s)-4.9 \frac{m}{s^{2} } .(0.675s)^{2} \\Y(0.675s) =2.236 m$

2.236 m is the maximum height from the shell (in which Vy=0 m/s)

Let's calculate now the height for t = 0.555 s

$Y(0.555s)= 6.62 \frac{m}{s} .(0.555s)-4.9\frac{m}{s^{2} } .(0.555s)^{2} \\Y(0.555s) = 2.165m$

The height asked is

∆h = 2.236 m - 2.165 m = 0.071 m

6 0

2 years ago

Which band of the electromagnetic spectrum has the lowest frequency

Murrr4er [49]

Answer:

Radio waves

Explanation:

Electromagnetic waves are produced by the oscillations of electric and magnetic field. They are transverse waves, which means that the oscillations occur in a direction perpendicular to the direction of propagation of the wave, and they are the only type of waves that can travel through a vacuum.

Electromagnetic waves are classified into 7 different types, depending on their frequencies. From lowest to highest frequencies, we have:

Radio waves

Microwaves

Infrared

Visible light

Ultraviolet

X-rays

Gamma rays

Radio waves are the electromagnetic waves with lowest frequency. They are used, for examples, for satellites, telecommunication, broadcasting.

5 0

2 years ago

Two containers have a substantial amount of the air evacuated out of them so that the pressure inside is half the pressure at se

Vlada [557]

Answer:

$Fm=\frac{A(Pno)}{2}$

Fm=730.7375N

Explanation:

Hello!

To solve this problem we must follow the following steps

1. Remember that force is the product of pressure and the perperndicular area on which it acts.

2. Draw a free body diagram of the container lid in New Orleans (see attached image).

3. Now we add the forces with their respective sign and find Fm equalizing it to zero, in this way we find the minimum force Fn that causes the lid to rise upwards

if you follow the previous steps and review the attached image you will find the following equation

Fm+(A)(Pc)=(Pno)(A)

Where

Fm=force required to remove the container lid in New Orleans

A=area=0.0145m^2

Pno=pressure in New Orleans= 100750 Pa

Pc=pressure in the tank(Remember that the pressure inside is half the pressure at sea level)=100750/2Pa=50375Pa=Pno/2

solving for Fm

Fm=A(Pno-Pc)

Pc=Pno/2

$Fm=A(Pno-\frac{Pno}{2})} \\Fm=\frac{A(Pno)}{2}$

this is the final expresion

if we solve

$Fm=\frac{0.0145m^2(100750Pa)}{2}=730.4375N$

4 0

2 years ago

What is the mass of a rock on the edge of a 40m cliff with 980 joules of potential energy?

kobusy [5.1K]

Answer:

Calculate Potential Energy (PE) for the given mass (m), acceleration of gravity (g) and height (h) through gravitational potential energy Calculator

3 0

2 years ago