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Nana76 [90]
4 years ago
12

NEED HELP!

Physics
2 answers:
Ludmilka [50]4 years ago
7 0

Answer:

I just took the quiz so i can assure you this is the right answer! I just checked it.

<h2>A. </h2>

a stable internal attribution

This is the correct answer to this question.

I hope this helps! <em><</em><em>3</em>

rjkz [21]4 years ago
4 0
C.<span>a stable internal attribution</span>
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Sam's job at the amusement park is to slow down and bring to a stop the boats in the log ride.
Mashcka [7]

The amount of work which Sam does need to stop the boat is 784Joule  if boat mass  is 800kg and boat drift in 1.4m/sec.

We know that according to work-energy theorem, change in kinetic energy of the body from one speed to another is equivalent to amount of work done by all forces acting on the body.

So, here we can see that final speed of boat is =0m/sec since Sam need to stop it.

Initial speed of boat is 1.4m/sec.

Also, we know that kinetic energy is given by the below formula:

Kinetic energy=(1/2)mv²

where m is the mass of the body

and v is the speed of the body

Now, from work energy theorem, we get

=>W=(1/2)mv^2_2 - (1/2)mv^2_1

=>W=0-(1/2)×800×(1.4)²

=>W= - 400× 1.4 × 1.4

=>W = -400×1.96

=>W= -784Joule

Here negative sign denotes work has to done against the original motion of boat.

Hence, amount of work needs to be done by Sam is 784Joule.

To know more about work,visit here:

brainly.com/question/18094932

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3 0
1 year ago
There are 5,280 feet in 1 mile and 12 inches in one foot. How many inches are in a mile?
ohaa [14]
63360
5280 feet*12 inches in every foot=63360
4 0
3 years ago
Observe yourself breathing and count the number of times you inhale per second. During each breath you probably inhale 0.66 L of
Pavel [41]

To solve this exercise it is necessary to apply the concepts related to Robert Boyle's law where:

PV=nRT

Where,

P = Pressure

V = Volume

T = Temperature

n = amount of substance

R = Ideal gas constant

We start by calculating the volume of inhaled O_2 for it:

V = 21\% * 0.66L

V = 0.1386L

Our values are given as

P = 1atm

T=293K R = 0.083145kJ*mol^{-1}K^{-1}

Using the equation to find n, we have:

PV=nRT

n = \frac{PV}{RT}

n = \frac{(1)(0.1386)}{(0.0821)(293)}

n = 5.761*10^{-3}mol

Number of molecules would be found through Avogadro number, then

\#Molecules = 5.761*10^{-3}*6.022*10^{23}

\#Molecules = 3.469*10^{21} molecules

7 0
3 years ago
A car is moving with a uniform velocity.find out the force of which it is moving
olya-2409 [2.1K]
If a car is moving with uniform velocity, then there is
no net force acting on it.

The force of the engine is exactly enough to balance
the forces of friction and air resistance against the car.

Also notice that there can't be any centripetal force, and the
car can't be on a curve.  If it's moving with "uniform velocity",
that means steady speed in a straight line.
7 0
4 years ago
How do I calculate the resistance in a circuit in which a 9-volt battery produces 3 amperes
Anastaziya [24]

U=R•I=>R=I/R=3/9=0.33 Ω

5 0
4 years ago
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