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FrozenT [24]
2 years ago
10

Sound travels at a rate of 340 m/s in all directions through air. Matt rings a very loud bell at one location, and Steve hears i

t some time later at his location 450 meters to the south. How long did it take the sound to travel from the bell to Steve's location?
Physics
1 answer:
Vika [28.1K]2 years ago
6 0

Answer:

110 m/s

Explanation:

because if you subtract 450 from 340 you get 110

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A cotton garment cannot keep us warm in winter as a woolen sweater can. Give <br> reason.
seropon [69]

Answer:

Cotton clothes are thin and do not have space in which air can be trapped. Thus, cotton clothes do not prevent heat coming out of our body. Woollen clothes keep us warm during winter because wool is a poor conductor of heat and it has air trapped in between the fibres.

Explanation:

5 0
3 years ago
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The earth pulls on the apple, and the apple pulls on the earth. This idea is represented by Newton's ___ Law of Motion.
algol [13]
It is the 3rd Law.  Every force in nature occurs in equal measure but opposite directions
3 0
3 years ago
The earth has a net electric charge that causes a field at points near its surface equal to 150 N/C and directed in toward the c
maria [59]

To solve this problem we will start using the concepts related to the electric field, from there we will find the load exerted on the body. Through this load it will be possible to make a sum of forces in balance to find the load that a human supports. Finally with these values it will be possible to find the repulsive force. We will proceed as follows,

The electric field is

E= \frac{kQ}{R^2}

Here,

k = Coulomb's Constant

Q = Charge

R = Distance (At this case from the center of mass of the earth to the surface)

Rearranging to find the charge,

Q = \frac{ER^2}{k}

Replacing,

Q = frac{(150)(6.38*10^6)}{8.99*10^9}

Q = 6.79*10^5 C

Since the electric field is directed towards the center of earth, the charge is negative.

PART A) Once the load is found we can proceed to apply the balance of Forces, for which the electrostatic force must be equivalent to the weight, this in order to satisfy the balance, therefore

F_w = F_e

mg = \frac{kQq}{R^2}

Replacing,

(62)(9.8) = \frac{(8.99*10^9)(q)(-6.79*10^5)}{(6.38*10^6)^2}

Solving for q,

q = -4.056C

PART B) Finally using the given distance and the values of the found load we can find the repulsive Force, which is

F =\frac{kq^2}{d^2}

F = \frac{(8.99*10^9)(-4.056)^2}{110^2}

F = 1.22*10^7N

PART C) The answer is no. According to the information found, we can conclude that traveling through an electric field is not viable because there is a repulsive force of great magnitude acting on the body.

3 0
3 years ago
What is the momentum of a compact car that is 750 kg and is travelling 30 m/s?
MakcuM [25]
The formula for momentum is p = mv, where p is momentum, m is mass, and v is velocity.

To solve for p, plug in 750 kg for mass and 30 m/s for velocity. • is a multiplication symbol

p = mv
p = 750kg • 30m/s
p = 22500 kg•m/s
5 0
3 years ago
How is gravitational force of earth is responsible for rainfall and snowfall
sukhopar [10]

Answer:

If there wasn't gravity on the earth, everything would float in the atmosphere as in the moon.

Due to the gravity, the rain and snow are pulled down to the earth's surface. So, gravitational force causes rainfall and snowfall

plz mark brainliest

8 0
3 years ago
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