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4 years ago

6

Does the accuracy of a measurement made always depend on the precision of the instrument used to make the measurement? Why or Wh

y not?

1 answer:

mina [271]4 years ago

8 0

Answer:

B

Explanation:

YOUR MUM NOOB SORRY MY MAD THE ANSWER WILL BE B BECAUSE B IS THE BEST YAY.

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You are walking toward the back of a train that is moving forward with a constant velocity. The train's velocity relative to the

yawa3891 [41]

Answer:

28.5 m/s

Explanation:

There are 2 different velocities: the train velocity and yours velocity. They're in opposite directions, so one is positive and other is negative. Take the forward direction as the positive:

V = +30 -1.5

V = 28.5 m/s

7 0

3 years ago

What type of star has a low temperture but a high luminosity?

andreev551 [17]

Red Giants have low temperature but a high luminosity

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3 years ago

A cosmic ray electron moves at 7.45 â 106 m/s perpendicular to the earth's magnetic field at an altitude where field strength is

kupik [55]

The magnetic force on the electron is:
$F=qvB \sin \theta$
where q is the electron charge, v the electron speed, B the magnetic field intensity and $\theta$ is the angle between v and B. Since the electron is traveling perpendicular to the magnetic field, $\sin \theta = \sin 90^{\circ}=1$ , so we can write
$F=qvB$

This force acts as centripetal force of the motion, $F_c = m \frac{v^2}{r}$ , where m is the electron mass and r the radius of the circular orbit. So we can write:
$qvB=m \frac{v^2}{r}$
and by re-arranging this equation, we find the radius of the circular orbit, r:
$r= \frac{mv}{qB}= \frac{(9.1 \cdot 10^{-31}kg)(7.45 \cdot 10^6 m/s)}{(1.6 \cdot 10^{-19}C)(1.10 \cdot 10^{-5}T)}= 3.85 m$

6 0

3 years ago

1. Find the total resistance passing through the circuit. Then find the total current passing

sdas [7]

Answer: The circuit depicted at the right is an example of the use of both series and parallel connections within the same circuit. In this case, light bulbs A and B are connected by parallel connections and light bulbs C and D are connected by series connections. This is an example of a combination circuit.

Explanation:

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3 years ago

What are the 5 destructive tests used in fiber analysis

Sever21 [200]

Most common are destructive tests, such as stress, fatigue and micro sectioning tests. There are also methods that allow non-destructive testing (NDT), so the material can be still be used after testing. Common methods are ultrasonic, X-ray, HF Eddy Current, Radio Wave testing or thermography.

7 0

3 years ago