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4 years ago

9

Who was the first head of the NASA space program was Sergei Korolov, but the Russians never identified him by name. What did the

y call him in public?

1 answer:

larisa86 [58]4 years ago

6 0

Korolev's name became known in the West. I hope this helps.

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A loop of wire is perpendicular to a magnetic field such that the field is coming straight at you through the loop. The field be

Umnica [9.8K]

Answer:

we will have induced magnetic field towards us

now in order to induce the magnetic field towards us we must have induced current in the loop and its direction is counterclockwise.

Explanation:

As per lenz law we know that the rate of change in magnetic flux linked with the closed loop will induced EMF in the loop and the direction of this induced current in the loop will always oppose the causes due to which it is induced

Here we know that magnetic field is straight towards us and it start decreasing with time

So we can say that flux linked with the coil will also decrease with time

Now as per lenz law the induced magnetic field of the loop is in such a direction that it will increase the magnetic flux in the coil.

So we will have induced magnetic field towards us

now in order to induce the magnetic field towards us we must have induced current in the loop and its direction is counterclockwise.

5 0

3 years ago

Calculate the equivalent resistance of the following circuit:<br><br> Req =

andrezito [222]

1/total = 1/2 + 1/4 + 1/6
That means 1/total = 11/12

Which means total resistance = 12/11 or 1.09ohm

6 0

3 years ago

If a 375 mL sample of water was cooled from 37.5 C to 0 C how much heat was lost in joules?

Leviafan [203]

Please, you have to apply the formula below:

<span>Q=c∗m∗Δt

</span><span> where Q is the energy lost,

c is the specific heat of water,

m is the mass of water involved,

so m=3.75 *10^-1 Kg

c=4,184 J/(Kg*°C)

<span>delta t=37.5 °C

I hope my answer has come to your help. God bless and have a nice day ahead!
</span></span>

3 0

3 years ago

On a cold day, the speed of sound in air is 330 m/s. A note with a frequency of 1,320 Hz is played on an instrument. What is the

Margarita [4]

Answer:

0.25 m

Explanation:

Given that,

The speed of sound, v = 330 m/s

The frequency of the note of the instrument, f = 1320 Hz

We need to find the wavelength of the sound wave.

We know that,

Wavelength, $\lambda=\dfrac{v}{f}$

Put all the values,

$\lambda=\dfrac{330}{1320}\\\\\lambda=0.25\ m$

So, the wavelength of the sound wave is equal to 0.25 m.

5 0

3 years ago

How is a niche like a persons job

Kipish [7]

A niche is the specific role an organism has in its environment. This is similar to a person's job as their job is the role a person has in society.

3 0

4 years ago