If 2.0 x 10^-4 C charge passes a point in 5.0 x 10^-5 s, what is the rate of current flow?4.0 x 10^-1 A
1.0 x 10^2 A
1.0 x 10^-10 A
4.0 x 10^0 A

Answers

Answer 1

Answer: Current is defined as the rate of charge flowing a point every second. Having a current of 1 Ampere signifies 1 Coulomb is flowing in a circuit every second. It is measured by the use of an ammeter which is positioned in series to the component to be measured. The current in the problem is calculated as follows:

I = 2.0 x 10^-4 C / 5.0 x 10^-5 s
I = 4 A

Answer 2

Answer:

Q= I×t

Where Q is charge in Coulombs C,

I is current in Amperes A,

t is in seconds s.

The rate of current flow is defined as the charge passing through a point in the circuit per second.

Rearranging formula gives I= $(Q)/(t)$

⇒I = $(2.0*10^-4)/(5.0*10^-5)$ = 4 Amperes

∴ current flow = 4.0×10^0 A

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A block has a volume of 0.09 m3 and a density of 4,000 kg/m3. What's the force of gravity acting on theblock in water? A. 3,038 N B. 882 N C. 2,646 N D. 3,528 N

A compact disc has a radius of 6 centimeters.a. What is its circumference in meters?
b. If the cd rotates 4 times per second, what is the linear speed of a point on the outer edge of the cd? Give
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c. What is the linear speed of a point 3 centimeters from the center of the cd? (Assume the angular speed
has not changed).

Answers

Circumference is $2\pi{r}=37.7$ (approx.)
Speed is 4 times that. That is, 150.8 cm/s or 1.508 m/s.
If we get a point at distance 3 cm, we take the radius half of that. The circumference also gets half, so does the linear speed. We get 0.754 m/s or 75.398 cm/s.

Answer:75.389

Explanation:

A _______ is a repeating disturbance or vibration that transfers or moves energy from place to place without transporting mass.force
wave
vacuum
medium
PLZ help me!

Answers

Answer: wave

Explanation:

These are the basic definitions and characteristic of the terms given, which show tha the only rigth answer is the second option: wave.

1) Force is an interaction. There are four natural forces: electrostatic, gravity, strong nuclear force and weak nuclear force.

2) Wave: is a sequence of pulses or vibrations that cause the continuous transportation of energy (propagation). There is not transport of mass, only energy.

Some examples of waves are sound waves, electromagnetic waves (light, radio waves, micro waves, infrarred waves, ultraviolet waves).

3) Vacuum: is the absence of matter; empty space. Only electromagnetic waves can travel through vacuum; other waves need a medium to travel.

4) Medium: any matter is a medium: a solid, the air, a liquid, all of them are media through which waves can transport its energy, depending of the wavelength.

A wave, waves transport energy rather than matter from one area to another.
An example of this is conduction of thermal energy, for instance when you heat up a saucepan the metal areas of the pan not touching the heat source still heat up due to waves of thermal energy (conduction)

A stealth bomber is flying straight and level at a constant speed of 150 m/s at an altitude of 3500 m above the ground. It drops a bomb intended to hit a specific target on the ground. a) How long will it take for the bomb to hit the ground?

b) At what horizontal distance away from its target must the bomber release the bomb in order to strike its target?

**disregard air resistance**

Answers

$Height = (1)/(2) gt^2 \n \n 3500 = (1)/(2) (9.8)(t^2)\n \n3500 = 4.9t^2\n\nt^2 =714.285714286\n\n\boxed {t=26.73~seconds}$

$\sf Horizontal ~distance = velocity * time\n\n Horizontal distance =150 * 26.73 \n\nHorizontal ~distance =4009.5$

A printer has a power of 100 W. It takes 30 seconds to print out a document. How much energy will ithave used?

Answers

A printer has power of 100 W, and it takes time of 30 seconds to print out the document, then the power consumed in 30 seconds will be 0.8333 W.

What is Power?

The quantity of energy moved or changed per unit of time is termed as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in historical texts. A scalar quantity is power.

Power is connected to other factors; for instance, the power required to move a land vehicle is equivalent to the sum of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.

Assuming the printer consumes electrical energy at a steady rate, then:

100 ÷ 60 = 1.6667 watts per minute.

Now, calculate the power consumed in 30 seconds,

1.6667 ÷ 2 = 0.8333 watts.

Therefore, the power consumed in 30 seconds will be 0.8333 watts.

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100W translates to 100 watts consumed in 1 hour. Assuming the printer consumes electrical energy at a steady rate, then: 100 ÷ 60 = 1.6667 watts per minute. 1.6667 ÷ 2 = 0.8333 watts consumed in 30 seconds.

If a small machine does 2,500 joules of work on an object to move it a distance of 100 meters in 10 seconds,what is the force needed to do the work? What is the power of the machine doing the work?

Answers

The force needed to do the work is equal to 25 N. The power of the machine doing the work is equal to 250 W.

What is power?

The power can be explained as the speed of doing work or work done in unit time. The SI unit of measurement of power joules per second (J/s) Watt (W).

Power can be defined as a time-based parameter and the change at work is done upon an object. The mathematical formula for power can be represented as mentioned below.

Power = Work/ time

P = W/t

Given, the work done by the machine, W = 2500 J

The distance moved by the object, d - 100 m

The work done can be represented in the form of the equation:
W = F.d

2500 = F.100

F = 25 N

The power of the machine doing the work, P = W/t

P = 2500 / 10

P = 250 W

Therefore, the force required to do the work is equal to 25 N. The power of the small machine doing the work is equal to 250 W.

Learn more about power, here:

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Well, 2500 joules for 100 meters is 2500/100=25 Newtons (force)
2500 joules in 10 seconds is a power of 250 Watts.

Which kind of waves are sound vibrations made of?transverse
circular
longitudinal
latitudinal

Answers

The answer is longitudinal. There are two types of waves: transverse and longitudinal. Transverse waves are those whose vibrations are perpendicular to the direction of the wave. Longitudinal or compression waves are those whose vibrations are in the same direction as the wave. Sound is caused by the compression of vibrations of molecules.

Answer:

longitudinal

Explanation:

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