3 years ago

4.

Physics

1 answer:

m_a_m_a [10]3 years ago

7 0

Answer:

iflwhat do I put in the fridge to get a better for my hair and I will get a better for sure I will get a

Explanation:

try not Helpful 6Helpful Question What are you doing a good job and why is this article is for you and I am going up to the store

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I need plz some on help me

Alex

I think the answer is repulsive.... Sorry if I get this wrong? :)

4 0

3 years ago

when an object is moving there is always a force pulling it in the direction of its motion?true or false? explain

pickupchik [31]

This is false because an object can also be pushed by force and isn't always have to be pulled by a force.

8 0

3 years ago

A force of 150N at an angle of 60 degree to the horizontal to pull a box through a distance of 50m calculate the work done

Alexxandr [17]

Force=150N
Angle=60°
Displacement=50m

$\boxed{\sf W=Fscos\Theta}$

$\\ \sf\longmapsto W=150(50)cos 60$

$\\ \sf\longmapsto W=7500\times \dfrac{1}{2}$

$\\ \sf\longmapsto W=3750J$

6 0

3 years ago

What is the current in a circuit that has voltage of 121.3 V and a total resistance of 56.3

Anuta_ua [19.1K]

Answer:

2.15 ampere

Explanation:

I = V/ R

= 121.3/56.3

= 2.15 A

3 0

3 years ago

To navigate, a porpoise emits a sound wave that has a wavelength of 3.3 cm. The speed at which the wave travels in seawater is 1

dedylja [7]

Answer:

$2.2\times 10^{-5} s$

Explanation:

We are given that

The wavelength of sound wave= $\lambda=3.3 cm=3.3\times 10^{-2}m/s$

1 cm/s= $10^{-2}m/s$

Speed of sound wave,v= $1522 m/s$

We have to find the period of the wave.

We know that

Frequency= $\nu=\frac{v}{\lambda}$

Using the formula

Frequency = $\frac{1522}{3.3\times 10^{-2}}=4.6\times 10^{4}$ Hz

Time period= $\frac{1}{4.6\times 10^4}=0.22\times 10^{-4}\times \frac{10}{10^1}=2.2\times 10^{-4-1}=2.2\times 10^{-5}s$

Using identity: $\frac{a^x}{a^y}=a^{x-y}$

Hence, the time period of the wave= $2.2\times 10^{-5} s$

4 0

3 years ago