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vagabundo [1.1K]
3 years ago
8

Your friend wants to join the school track team, and has asked for your help to determine how fast she can run. What kind of inf

ormation would you need to collect to help your friend???
Physics
1 answer:
Zigmanuir [339]3 years ago
6 0

Answer:

you calculate a specific type of run for example 100m and it takes 20 seconds to finish and calculate the time it takes them to finish

hope this helps

have a good day :)

Explanation:

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Two girl scouts are sitting in a large canoe on a still lake while at summer camp. the canoe happens to be oriented with the fro
MrRissso [65]
That it's more puashe on the back of the canoe and that effects the back of the canoe to fall back
7 0
3 years ago
2. A uniform wire of resistance R is stretched until its length doubles. Assuming its density and resistivity remain constant, w
never [62]

Answer:

Resistance is quadrupled.

Explanation:

Solving this requires us to use the formula of resistivity.

Resistivity is usually said to be the measure of the resistance of a particular size of any given material to the electrical conduction. It is mathematically represented as

ρ = RA/L, where

ρ = the resistivity of the given material

R = the resistance of the material

A = the area of the material

L = length of the material.

From the question, we're told that the length is doubled with the resistivity and density remaining constant. If the density is constant, this makes the volume constant as well.

Volume, V = A * L. We're then told that the length is doubled. If the length is doubled, for the volume to remain constant, then the area must be halved.

Volume, V = A/2 * 2L

Making, Resistance R, subject of the formula, we have

R = ρL/A.

Since resistivity is constant and the area is halved, we then have

R = 2L / (1/2A)

R = 4L / A

If the length is doubled, we have the resistance to be quadrupled

3 0
3 years ago
A negative slope on the velocity versus time graph indicates that an object is not accelerating true or false ?
dangina [55]

Explanation :

We know that the slope of velocity -time graph gives the acceleration. Acceleration of an object is defined as the rate of change of velocity i.e.

a=\dfrac{dv}{dt}

Suppose a driver suddenly applies brakes. In this case the initial velocity of his or her vehicle is more and the final velocity is less.

So, the acceleration is negative in this case i.e. the object is decelerating.

A negative slope on the velocity versus time graph indicates that an object is not accelerating. This statement is false as the object is decelerating.

8 0
3 years ago
The fluid pressure 10 ft underwater is ____ the fluid pressure 5 ft underwater
quester [9]
5ft is two times the 10ft
5 0
3 years ago
Three fire hoses are connected to a fire hydrant. Each hose has a radius of 0.014 m. Water enters the hydrant through an undergr
Makovka662 [10]

Answer:

Explanation:

The total fluid mass can be obtained by multiplying the mass flow rate by the time flow rate.

Mass flow rate is given as

m = ρAv

Where

m is mass flow rate

ρ is density

A is area and it is given as πr²

v is velocity

Then,

M = mt

Where M is mass and t is time

Them,

M = ρAv × t

M = ρ× πr² × v × t

Given that, .

Radius of pipe is

r = 0.089m

velocity of pipe is

v = 3.3m/s

Time taken is

t = 1 hour = 3600 seconds

Density of water is

ρ = 1000kg/m³

M = ρ× πr² × v × t

M = 1000 × π × 0.089² × 3.3 × 3600

M = 295,628.52 kg

M = 2.96 × 10^5 kg

8 0
4 years ago
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