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zimovet [89]
4 years ago
10

The same force is applied to two skateboards. One rolls across the room and the other moves a few feet and comes to a stop. Wher

e was there more work done?
a. The skateboard that traveled the shorter distance shows more work because there was more resistance.
b. The skateboard that traveled the longer distance shows more work because it was lighter.
c. The skateboard that traveled further shows more work because the distance was greater.
d. The skateboard that traveled the shorter distance shows more work because the force was greater.
Physics
2 answers:
podryga [215]4 years ago
8 0

The question and all of the choices are rather messy and misleading.

Here's a simple statement that you can use to make the best match:

If the two forces are equal, then more work is done by the force that
continues to be applied through the greater distance.

mestny [16]4 years ago
6 0

Answer:

<h2>C</h2>

Explanation:

<h2>THIS IS TRUE BECAUSE I TOOK THE TEST, and because THE EQUATION FOR WORK IS WORK = FORCE * DISTANCE AND EVEN THO THEY BOTH HAVE THE SAME FORCE THE OTHER ONE HAS MORE DISTANCE, ITS LIKE SAYING WHICH EQUAION HAS A BIGGER ANSWER 1*1 OR 1*2 WELL ITS OBVIOUSLY THE SECOUND EQUATION SO THE ANSWER IS C LIKE I SAID BEFORE</h2><h2 /><h2>BTW  AL2006 IS WRONG AND I DONT EVEN UNDERSTAND WHAT HE EVEN THO HE IS "TRUSTED"</h2>
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A vertical piston-cylinder device initially contains 0.1 m^3 of air at 400 K and 100 kPa. At this initial condition, the piston
jenyasd209 [6]

Answer:

Q=-38.15kJ

Explanation:

From the question we are told that

Piston-cylinder initial Volume of air v_1=0.1 m^3

Piston-cylinder initial temperature T_1=400k

Piston-cylinder initial pressure P_1= 100kpa

Supply line temperatureT_s=400k

Supply line pressure P_s= 500kpa

Valve  final pressure P_v=500kpa

Piston movement pressure P_m=200kpa

Piston-cylinder final Volume of airv_2=0.2 m^3

Piston-cylinder final temperature T_2=440k

Piston-cylinder final pressure P_2= 500kpa

Generally the  equation for conservation of mass is mathematically given by

Q=m_2 \mu_2-m_1 \mu_1 +W-(m_2-m_1)h

where

Initial moment

m_1=\frac{p_1 V_1}{RT_1}

m_1=\frac{100*0.1}{0.287*400}

m_1=8.7*10^-^2kg

Final moment

m_2=\frac{p_2 V_2}{RT_2}

m_1=\frac{500*0.3}{0.287*440}

m_1=79*10^{-2}kg

Work done by Piston movement pressure

W=Pd

W=P(v_2-v_1)

W=200(0.2-0.1))

W=20000J

Heat function

h=cT_1

h=1.005(400)

h=402

Therefore

Q=(0.792*0.718(440)-0.0871*0.718(400)+20-(0.792-0.087)*402))

Q=-38.15kJ

It is given mathematically that the system lost  or dissipated Heat of

Q=-38.15kJ

7 0
3 years ago
Jasmine makes a note card about series circuits. she records the points shown. a 2 column table with 1 row. the column on the le
Bess [88]

Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.

<h3>What is a parallel circuit?</h3>

A parallel circuit is a circuit in which the components are connected to a common junction. This implies that if one bulb goes out in a parallel connection, all the bulbs will go out.

As such, Jasmine need to correct the error by switching the headings on the columns adding the title parallel circuits.

Learn more about parallel connection: brainly.com/question/12400458

#SPJ4

7 0
2 years ago
a toy car travels from A to B at constant speed 30km/hr and without stopping at B return A at constant speed v. if the average s
adelina 88 [10]

Answer:

Speed BA = 18 km/hr.

Explanation:

Given the following data;

Speed AB = 30km/hr

Speed BA = x km/hr

Average speed = 24 km/hr

To find the value of x;

Average speed = (Speed AB + Speed BA)/2

Substituting into the equation, we have

24 = (30 + x)/2

48 = 30 + x

x = 48 - 30

x = 18 km/hr

4 0
3 years ago
Question 2 (5 points)
d1i1m1o1n [39]

Answer:

Frequency of sound wave = 198.83 hertz (Approx.)

Explanation:

Given:

Velocity of sound wave in air = 340 m/s

Wavelength = 1.71 meter

Find:

Frequency of sound wave

Computation:

Frequency = Velocity / Wavelength

Frequency of sound wave = Velocity of sound wave in air / Wavelength

Frequency of sound wave = 340 / 1.71

Frequency of sound wave = 198.8304

Frequency of sound wave = 198.83 hertz (Approx.)

6 0
3 years ago
Draw a diagram showing 2 forces acting on an object in opposite directions with a total net force of 3N to the left.
andriy [413]

Answer:

hope it helps u ........

6 0
3 years ago
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