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2 years ago

Một vật được ném lên trên theo phương thẳng đứng. Người quan sát

Physics

1 answer:

Arte-miy333 [17]2 years ago

4 0

Answer:

Language -English plz I cant understand

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After pushing away from each other, two objects have equal but opposite momentum. Which of the following is true for the total m

weqwewe [10]

I think the answer is B

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3 years ago

While Bob is demonstrating the gravitational force on falling objects to his class, he drops an 1.0 lb bag of feathers from the

BartSMP [9]

In the experiment of free fall bob released a bag of mass 1 lb

so here we can say that initial speed of the bag is Zero

time taken by the bag to free fall is given as

t = 1.5 s

also the acceleration of free fall is given as

a = 9.8 m/s^2

now we will use kinematics equation here for finding the distance of free fall

$d = v_i * t + \frac{1}{2} at^2$

$d = 0 + \frac{1}{2}*9.8* 1.5^2$

$d = 4.9 * 2.25$

$d = 11.025 m$

so the bag will fall down by total distance of 11.025 m from its initial released position.

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3 years ago

Where are overcurrent protective devices normally installed in a branch circuit?

love history [14]

Overcurrent protective devices are normally installed in a branch circuit from where the conductors receive their supply.

<h3>What is resistance?</h3>

Resistance is the obstruction of electrons in an electrically conducting material. The mathematical relation for resistance can be understood with the help of the empirical relation provided by Ohm's law.

V=IR

V is the voltage,I is the current and R is the resistance

The vercurrent protective devices are normally installed in a branch circuit from where the conductors receive their supply.

Thus, In a branch circuit, overcurrent safety devices are often located from where the conductors get their supply.

Learn more about resistance from here, refer to the link;

brainly.com/question/14547003

#SPJ4

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11 months ago

Tides occurs in oceans but not in lakes.why?

-Dominant- [34]

Answer:

Explanation:

Tides occur in the ocean but nit in lakes because an ocean is a free flowing body of water that can travel a large area of the globe while a lake or pond only covers a small area of the earth so it is not affected by gravity as violently and in turn, prevents the formation of tides.

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2 years ago

A railroad train is traveling at 32 m/s in still air. The frequency of the train whistle is 350 Hz. What is the wavelength of th

FinnZ [79.3K]

Answer:

0.9 m,386.36 Hz

Explanation:

We are given that

Speed of train,vs=32 m/s

Frequency of whistle,f0=350 Hz

We have to find the wavelength of sound and the frequency of heard by the listener in front of the locomotive.

Speed of sound= $v=340 m/s$