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3 years ago

Which of the following is an example of an incline plane? a) lever b)gear c)pulley d)screw

Physics

2 answers:

slega [8]3 years ago

3 0

Gear because each spike is a wedge shape that adds a mechanical advatage

pochemuha3 years ago

3 0

Some examples<span> of </span>inclined planes<span> include wheelchair ramps, airplane evaluation slides and various loading ramps used on trucks. An </span>inclined plane<span> refers to any structure that is oriented on an angle, which resembles a triangle when viewed from the side.

I think the answer is C</span>

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A cyclotron is to accelerate protons to an energy of 5.4 MeV. The superconduction electromagnet of the cyclotron produces a 2.9T

mart [117]

<h3><u>Answer;</u></h3>

Radius = 0.0818 m

Angular velocity = 2.775 × 10^7 rad/sec

<h3><u>Explanation;</u></h3>

The mass of proton m=1.6748 × 10^-27 kg;

Charge of electron e= 1.602 × 10^-19 C;

kinetic energy E= 2.7 MeV

= 2.7 × 10^6 × 1.602 × 10^-19 J;

= 4.32 × 10^-13 Joules

But; K.E =0.5m*v^2,

Hence v=√(2K.E/m)

Velocity = 2.27 × 10^7 m/s

Angular velocity, ω = v/r

Therefore; V = ωr

Hence; V = √(2K.E/m) = ωr

r= √(2E/m)/w = √E*√(2*m)/(eB)

= √E * √(2×1.6748×10^-27)/(1.602×10^-19 ×2.9)

but E = 4.32 × 10^-13 Joules

r = 0.0818 m

Angular speed

Angular velocity, ω = v/r , where r is the radius and v is the velocity

Therefore;

Angular velocity = 2.27 × 10^7 / 0.0818 m

= 2.775 × 10^7 rad /sec

3 0

3 years ago

A heater marked 2000W/3000W is switched on for 4 hours. For the first hour it is on the highest setting and for the last 3 hours

Leni [432]

Answer:

9 kW-hr

Explanation:

3000 W = 3 kW for 1 hr = <u>3 kW - hr </u>

2000 W = 2 kW for 3 hr = <u> 6 kW -hr</u>

<u />

total power = <u> 3 + 6 = 9 kW-hr</u>

3 0

2 years ago

An inductor connects to an AC circuit. If the frequency of the AC oscillations decreases, does the inductance increase, decrease

ASHA 777 [7]

Answer:

The inductance remains constant

Explanation:

The inductance value remains constant because it is a intrinsic property of an inductor. Its value depends on physical characteristics and dimensions like length, number of turns, etc.

What changes is the impedance of the inductance. Now, the impedance does changes with the frequency of the AC signal. The relations is as follows:

Z = jωL, where Z is the impedance, j is the imaginary unit, ω is the angular frequency, and L is the inductance.

In terms of frequency ω=2π·f, where f is the frequency of the signal.

So, the impedance in terms of f is:

Z = j·2·π·f·L

If f decreases, the value of the Z decreases too, because if f has a lower value and the other terms remain constant, the value of Z will be lower.

So, the inductance remains constant.

7 0

3 years ago

How do you solve for initial velocity?

nikdorinn [45]

Velocity is a function of time and defined by both a magnitude and a direction. Often in physics problems, you will need to calculate the initial velocity (speed and direction) at which an object in question began to travel. There are multiple equations that can be used to determine initial velocity. Using the information given in a problem, you can determine the proper equation to use and easily answer your question. Sorry if this is not what your looking for

6 0

3 years ago

Light from a laser strikes a diffraction grating that has 5500 lines per centimeter. The central and first-order maxima are sepa

WINSTONCH [101]

.Answer:

491.4 nm

Explanation:

The distance between central and first maxima is,

$y=0.455m$