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4 years ago

12

The distance between two subway stations is 3 miles. If a train travels between the two stations at an average speed of 60 mph,

how many minutes does it take for the train to finish the trip between the two stations?

1 answer:

VLD [36.1K]4 years ago

5 0

Answer:3 minutes

Explanation:60 miles an hour, 60 minutes in an hour, 1 mile per minute

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Which of the following is an example of a example of a decomposition recreation

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i am 2.5 with the thhe 2020 is 3 and 5 is 7

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3 years ago

The magnitude of the force associated with the gravitational field is constant and has a value F. A particle is launched from po

Goryan [66]

Answer:

Energy gained by the second particle = 12Uo

Explanation:

Given Data;

Resistant force = 12F

Initial kinetic energy = Uo

Calculating the kinetic energy gained, we have;

u = f *r

where f= resistant force = 20F

r = initial kinetic energy = Uo

Therefore,

U = 12 * uo

= 12 Uo

Therefore, energy gained by the second particle = 12Uo

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4 years ago

The frequency of the applied RF signal used to excite spins is directly proportional to the magnitude of the static magnetic fie

telo118 [61]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The uncertainty in inverse frequency is $\Delta [\frac{1}{w} ]= \frac{3}{2000} \ s$

Explanation:

From the question we are told that

The value of the proportionality constant is $k = 5 \frac{Hz }{T}$

The strength of the magnetic field is $B = 20 \ T$

The change in this strength of magnetic field is $\Delta B = 3 \ T$

The magnetic field is given as

$B = \frac{k}{\frac{1}{w} }$

Where $w$ is frequency

The uncertainty or error of the field is given as

$\Delta B = \frac{k }{[\frac{1}{w}^]^2 } \Delta [\frac{1}{w} ]$

The uncertainty in inverse frequency is given as

$\Delta [\frac{1}{w} ] = \frac{\Delta B}{k [\frac{1}{w^2} ]}$

$\Delta [\frac{1}{w} ]= \frac{\Delta B}{k (B)^2 }$

substituting values

$\Delta [\frac{1}{w} ]= \frac{3}{5 (20)^2 }$

$\Delta [\frac{1}{w} ]= \frac{3}{2000} \ s$

6 0

3 years ago

A TV set shoots out a beam of electrons. The beam current is 10A. How many electrons strike the TV screen in a minute.

Wittaler [7]

Answer:

600 mC

Explanation:

The charge of an electron is 1.6 x 10-19C so for a current with 10 mA, the charge going to screen in one second is 10 mC

so number of electrons, n = (10 x 10-3)/(1.6 x 10-19) = 6.25 x 1016 so in a minute the charge is 10 * 60 = 600 mC

4 0

3 years ago

Read 2 more answers

An unbalanced force of 20 N is applied to a 4.0 kg mass at rest. What is the

inna [77]

Answer:

<h2>5 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

$a = \frac{f}{m} \\$

f is the force

m is the mass

We have

$a = \frac{20}{4} = 5 \\$

We have the final answer as

<h3>5 m/s²</h3>

Hope this helps you

5 0

4 years ago