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3 years ago

A device that starts or stops the flow of current

Physics

1 answer:

Colt1911 [192]3 years ago

7 0

a switch is a device that starts or stops the flow of current

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What is the magnetic field strength required to make a proton with a speed of 5.0 x 10^(5) m/s follow a circular path of radius

Nuetrik [128]

Answer:

Magnetic field strength required for this is 0.25 T

Explanation:

As we know that the proton moves in circular path in uniform magnetic field

so the radius of the path of the circle is given as

$R = \frac{mv}{qB}$

here we know that

$q = 1.6 \times 10^{-19}C$

$m = 1.6 \times 10^{-27} kg$

$R = 0.0200 m$

$v = 5 \times 10^5 m/s$

now we have

$B = \frac{1.6 \times 10^{-27} (5 \times 10^5)}{(1.6 \times 10^{-19})(0.02)}$

so we have

$B = 0.25 T$

8 0

4 years ago

A rocket with total mass 3.00 3 105 kg leaves a launch pad at Cape Kennedy, moving vertically with an acceleration of 36.0 m/s2.

Simora [160]

Answer:

(b) 2.40 x $10^{3}$ kg/s

Explanation:

Given that: Total mass of the rocket = 3.003 x $10^{5}$ kg

acceleration of the rocket = 36.0 m $s^{-2}$

speed of the exhausted gases = 4.503 x $10^{3}$ m/s

Rate at which rocket was initially burning fuel = $\frac{mass}{time}$

But,

time = $\frac{velocity}{acceleration}$

= $\frac{4.503*10^{3} }{36.0}$

= 125.0833 s

So that;

Rate at which rocket was initially burning fuel = $\frac{3.003*10^{5} }{125.0833}$

= 2400.8001

= 2.40 x $10^{3}$ kg/s

Therefore, the initial rate at which the rocket burn fuel is 2.40 x $10^{3}$ kg/s.

6 0

3 years ago

Which two energy sources can help a star maintain its internal thermal pressure? which two energy sources can help a star mainta

Lapatulllka [165]

Nuclear fusion and gravitational contraction

<span>constituent of star is hydrogen(including isotope) or helium. nuclear fission is almost impossible. D(deuterium; isotope of hydrogen) and T(tritium; also isotope of hydrogen) reacts and helium is formed. During this reaction, severe energy is generated. Heavier elements are formed and pulls each other. Gathered elements forms core of star. Gravity of the core prevents the gas to run away.</span>

8 0

4 years ago

Read 2 more answers

Different color ca

777dan777 [17]

Answer: The color of candy cane

Explanation:

An independent variable is the Variable that the scientist changed in order to change the dependent variable. The scientist changes the color of the candy cane to test the rate at which they dissolve.

4 0

4 years ago

A sound has 13 crests and 15 troughs in 3 seconds. When the second crest is produced the first is 2cm away from the source? Calc

Yuki888 [10]

Answer:

The wavelength will be 4 cm, frequency will be 4.66 Hz and wave speed is 18.6 cm/sec

Explanation:

Given:

No. of crest = 13

No. of trough = 15

Time = 3 seconds

Hence, 1 crest or 1 trough = $\frac{1}{2}\lambda$