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3 years ago

What type of observation is made through interviewing people’s

Physics

1 answer:

Marianna [84]3 years ago

8 0

Answer:

Interviewing and observation are two methods of collecting qualitative data as part of research. ... Interviews vary from structured, in which a set list of questions is asked of every interviewee, to unstructured, which is open-ended.

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Which term is used to describe all the habitats around the world

mr Goodwill [35]

THe answer is ecosystem diversity
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3 years ago

Help me please urgent

goblinko [34]

Answer:

So where the red square is located it will be 90 °

And another will be 180-90-57= X

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3 years ago

A truck using a rope to tow a 2230-kg car accelerates from rest to 13.0 m/s in a time of 15.0s. How strong must the rope be? μk

ExtremeBDS [4]

Answer:

The rope must have a force of 10084,21 N

Explanation:

$ac=ac=\frac{13}{15} \frac{m}{s}$

$ac = at = \frac{13-0}{15-0}$

We replaced the known information in the equation(1):

vi = Initial speed = 0, ti = initial time = 0

Known information:

at: truck acceleration(m/s2)

ac: car acceleration $\frac{m}{s^{2} }$

Kinematic analysis

The car acceleration is equal to the acceleration of the truck because the truck and the car are connected by the rope.

We apply Newton's first law to calculate the Normal force because there is no movement in the vertical direction:

$∑Fy= 0$

$N-W=0$

$N=W$

$N=21854 N$

We replace the values of the mc and g in the equation(2):

$Wc= 2230*9.8$

$Wc=21854 N$

Normal force calculation:

Car weight calculation:

$Wc=mc*g$

mc = Car mass = 2230kg

g = Gravity acceleration=9.8 $\frac{m}{s^{2} }$

Friction force calculation (Ff):

We have the formula to calculate the friction force:

Ff = μk * N Equation (3)

μk: kinetic coefficient of friction

We know that μk = 0.373and N= 21854N , then we replaced this data in(3):

$Ff=0.373*21854$

$Ff=8151.54 N$

Calculation of the tension force in the ro pe (T):

We apply Newton's Second law to calculate the Normal force because there is no movement in the horizontal direction:

$∑Fx= mc*ac$

We take the sense of the forces like this:

positive to the right and negative to the left

$T-Ff=mc*ac$

$T=2230(\frac{13}{15} + 8151.54$

$T=10084,21 N$

Answer: The rope must have a force of 10084,21 N

7 0

4 years ago

1.) What is the process called when a liquid changes to a

nevsk [136]

Answer:

1.)Evaporation, 2.) solid

Explanation:

hope this helps can i get brainliest

8 0

3 years ago

A 50.0 kg student climbs 5.00m up a rope at a constant speed. If the student's power output is 200.0 W, how long does it take th

hammer [34]

Answer:

The time taken by the student to climb is 12.25 seconds and work done is 2450 J.

Explanation:

Given that,

Mass of the student, m = 50 kg

The student climbs to a height of 5 meters at a constant speed.

The student's power output is 200.0 W, P = 200 W

The power of an object is given by work done divided by time taken. So,

$P=\dfrac{W}{t}$

(b) W is work done,

$W=mgh\\\\W=50\times 9.8\times 5\\\\W=2450\ J$

(b)

$t=\dfrac{W}{P}\\\\t=\dfrac{2450}{200}\\\\t=12.25\ s$

So, the time taken by the student to climb is 12.25 seconds and work done is 2450 J.

3 0

4 years ago