Scientific endeavor is sometimes accompanied by negative tradeoffs.<br> true or false???????????? :0

A pressure is applied to 2L of water. The volume is observed to decrease to 18.7 L. Calculate the applied pressure.

lakkis [162]

Answer:

Applied pressure is 1.08 10⁵ Pa

Explanation:

This exercise is a direct application of Boyle's law, which is the application of the state equation for the case of constant temperature.

PV = nR T

If T is constant, we write the expression for any two points

Po Vo = p1V1

From the statement the initial pressure is the atmospheric pressure 1.01 10⁵ Pa, so we clear and calculate

1 Pa = 1 N / m2

P1 = Po Vo / V1

P1 = 1.01 10⁵ 20/18.7

P1 = 1.08 10⁵ Pa

4 0

3 years ago

PLEASE HELP ASAP!!! CORRECT ANSWER ONLY PLEASE!!! I CANNOT RETAKE THIS!!

scoray [572]

Jim walks 7 miles from the starting point to the end point
i guess so

3 0

4 years ago

Read 2 more answers

The resting heart rate will increase quickly in a person who has a high level of cardiovascular fitness. True or false

mestny [16]

False . It won't increase, take an athlete for example . They don't get tired as easily because their cardiovascular fitness is strong .

6 0

3 years ago

Read 2 more answers

If you placed a cylinder with a 0.25 m radius in the middle of a record player that spins at 4.7 rad/s, what is its angular mome

podryga [215]

Answer:

0.29 kg m² / s

Explanation:

Angular momentum is the product of moment of inertia and angular velocity.

L = I ω

For a solid cylinder, I = ½ m r².

L = ½ m r² ω

L = ½ (2.0 kg) (0.25 m)² (4.7 rad/s)

L = 0.29 kg m² / s

7 0

3 years ago

At what value of angle between two vectors will the resultant of the two vectors be maximum?

yan [13]

The resultant is maximum when the angle between the two vectors is zero

Explanation:

The formula to calculate the resultant of two vectors A, B is the following:

$R=\sqrt{A^2+B^2+2ABcos \theta}$

where

A is the magnitude of vector A

B is the magnitude of vector B

$\theta$ is the angle between the directions of A and B

This formula can be derived by applying the parallelogram law.

From the formula, we observe that:

- When $\theta=0^{\circ}$ (vectors A and B parallel), $cos \theta = 1$ . so the resultant becomes simply

$R=\sqrt{A^2+B^2 + 2AB}=\sqrt{(A+B)^2}=A+B$

- When $\theta = 90^{\circ}$ (vectors A and B perpendicular), $cos \theta = 0$ , so the resultant becomes

$R=\sqrt{A^2+B^2}$

- When $\theta=180^{\circ}$ (vectors A and B anti-parallel), $cos \theta = -1$ , so the resultant becomes

$R=\sqrt{A^2+B^2 - 2AB}=\sqrt{(A-B)^2}=|A-B|$

By looking at the three cases and at the formula, we see that the maximum value of the resultant is when the angle between the two vectors is zero, since in that case the resultant is simply obtained by adding the magnitudes of the two vectors.

Learn more about vector addition:

brainly.com/question/4945130

brainly.com/question/5892298

#LearnwithBrainly

3 0

4 years ago

Scientific endeavor is sometimes accompanied by negative tradeoffs. true or false???????????? :0