Ask question

Ask question

All categories

bearhunter [10]

3 years ago

5

Which of the following is the displacement from point P to point W?

2 answers:

saul85 [17]3 years ago

7 0

it would be a +b

Explanation:

bc it's from where the point where you started and when you ended

asambeis [7]3 years ago

4 0

Answer:

the answer is A+b

Explanation:

You might be interested in

which best describes the difference between speed and velocity? A) velocity is instantaneous ,B) speed is a vector quantity

Soloha48 [4]

Answer:

A is the correct answer trust me

3 0

3 years ago

To what temperature must you raise a silver wire (c = 0.0038), originally at 20.0°C, to double its resistance, neglecting any ch

balu736 [363]

Answer:

$T=283^{\circ}C$

Explanation:

Given a material with temperature coefficient of resistance <em>c</em>, the equation that relates the resistance $R_0$ at temperature $T_0$ and the resistance $R$ at temperature $T$ is

$\frac{R-R_0}{R_0}=c(T-T_0)$

We want to double our resistance, so $R=2R_0$ , thus having:

$\frac{2R_0-R_0}{R_0}=\frac{R_0}{R_0}=1=c(T-T_0)$

For this T must be:

$1=cT-cT_0$

$T=\frac{1+cT_0}{c}$

which for our values means (with $T=20^{\circ}C=293^{\circ}K$ , remember to write temperature in S.I., and that for silver $c=0.0038^{\circ}K^{-1}$ ):

$T=\frac{1+(0.0038^{\circ}K^{-1})(293^{\circ}K)}{(0.0038^{\circ}K^{-1})}=556^{\circ}K=283^{\circ}C$

3 0

2 years ago

A 8.01-nC charge is located 1.87 m from a 4.50-nC point charge. (a) Find the magnitude of the electrostatic force that one charg

valkas [14]

Answer:

Explanation:

Given

$q_1=8.01\ nC$

$q_2=4.50\ nC$

distance between the charges is given by $d=1.87\ m$

Electrostatic force between the charges is given by

$F_{12}=F_{21}=\frac{kq_1q_2}{d^2}$

where k=constant $=9\times 10^{9}$

$F_{12}=F_{21}=\frac{9\times 10^9\times 8.01\times 4.50\times 10^{-18}}{(1.87)^2}$

$F_{12}=F_{21}=92.769\times 10^{-9}\ N$

as both the charges are of similar nature therefore they repel each other

8 0

3 years ago

What does the big bang theory explain?

kotegsom [21]

The answer is c because the big bang theory is about how the universe was created by infinite energy

6 0

3 years ago

Tell the order of vessels a blood cell travels through

il63 [147K]

It goes through your left atrium and right atrium

7 0

3 years ago