Which of the following is most likely to require direct current (DC) for proper operation?

a. A blender

b. A flashlight

c. An electric heater

d. A microwave oven

Answers

Answer 1

Answer:

the answer is b

Explanation:


Related Questions

A sound wave is produced by a musical instrument for 0.40 second. If the frequency of the wave is 370 hertz, how many complete waves are produced in that time period? *
A) 200 waves
B)150 waves
C)100 waves
D) 50 waves

Answers

E⁣⁣⁣xplanation i⁣⁣⁣s i⁣⁣⁣n a f⁣⁣⁣ile

bit.[tex]^{}[/tex]ly/3a8Nt8n

The number of waves produced by the musical instrument during the given time is 148 waves.

What is meant by frequency of a wave ?

Frequency of a wave is defined as the number of oscillations completed by the wave in one second.

Here,

The frequency of the wave, f = 370 Hz

That means the wave completes 370 oscillations in 1 second. Or 370 waves are produced by the musical instrument in 1 second.

The time taken by the instrument to produce waves, t = 0.4 s

Therefore,

The number of waves produced by the musical instrument during this time is,

n = f x t

n = 370 x 0.4

n = 148

Hence,

The number of waves produced by the musical instrument during the given time is 148 waves.

To learn more about frequency of a wave, click:

https://brainly.com/question/3693482

#SPJ3

Which action MOST LIKELY occurred in order for the sugar to dissolve?

Answers

Answer:

In order for sugar to dissolve, there must be an attraction between the two substances.

Explanation:

Water and sugar are both attracted to each other, which is why sugar is able to dissolve in water.

Hope this helps! :)

Answer:

the water was stirred

Explanation:

it’s need as a type of attraction

What heat transfer are uv rays from the sun. Radiation, conduction, or convection

Answers

Answer:

The ans is Radiation

Mark as brainliest !!

pls help Which one of the following is NOT acceleration
A.
a change in mass
B.
a change in direction
C.
an increase in velocity
D.
a decrease in velocity

Answers

Answer:

C

Explanation:

Am increase in velocity?

Answer:

change in mass is not acceleration

TEST INTRO 20

The fact that a pen drops when you let it go is an example that can help explain ...
A: the hypothesis of gravity.
B: the theory of gravity.
C: the gravity of the situation.
D: the law of gravity:

Answers

Answer:

D

Explanation:

1. The wavelength of light of a particular colour is
5800 A. Express it in (a) nanometre and (b) metre.

Answers

Answer:

In Nanometer- 580 nanaometers

In Meter - 5.8 x 10^-7

Someone please help me with this:(

Answers

Answer:

The first or last one

Explanation:

Because they both are right

A cruise ship travels across a river at 25 meters per minute. If the river is 6200 meters wide, how long
does it take the ship to reach the other side.

Answers

Answer:

248 minutes

Explanation:

6200/25=248

This means there is 248 25s in 6200

which means it will take 248 minutes to travel through the river

Also here's a neat trick:

The units for speed is meters/minute

The units for distance is meters

Dividing distance by speed will cancel out the meters and leave only the speed.

Which is the best description of a high pressure system?



A.
Air cools and rises.

B.
Air warms and rises.

C.
Air cools and sinks.

D.
Air warms and sinks.

Answers

Answer:

The Answer is gonna be B.

Air warms and rises.

On a distance-time graph, which is your independent and dependent variable?

Answers

Answer:

On a distance time graph, the distance will always be the dependent variable on the y- axis. Time is the independent variable and will always be placed on the x-axis. The lines on the graphs can tell you many different things.

Explanation:

ANSWER:

the dependant variable is on the y axis and the independent variable is on the x axis.

A typical electromagnetic signal from a communications satellite might have an intensity of 0.600 pW/m2 at the surface of the Earth. Your satellite dish collects the energy of the electromagnetic signal from the satellite; then your dish passes that energy to its central receiver, where the signal can be processed by a circuit. The area of a satellite dish can be calculated from pi (3.1416) times the radius squared. If your satellite dish has a radius of 0.28 m, and if it is receiving the signal described above, how much electromagnetic energy is reflected to the central receiver in 2.5 minutes

Answers

Answer:

The answer is "22.05 pJ"

Explanation:

Using formula:

[tex]Energy=power\times time\\\\Power=Intensity \times area[/tex]

Calculating Energy:

[tex]=0.147 \times 2.5 \times 60 \times 10^{-12}\\\\=22.05\ pJ[/tex]

What voltage is required to move 2A through 5Ω?

Answers

10
Explanation: V=AxR
2x5 (2 times five)

A wave is moving between two mediums, as shown in the diagram below. The
wave is slowing down and changing directions. What wave property is
illustrated?
A. Refraction
B. Resonance
C. Diffraction
D. Reflection

Answers

Answer:

Uhm i think its a

Explanation:

srry if i get it wrong ._. my bad

Answer:

the correct answer is A

Adding energy (_____) causes the temperature to _____ OR the phase to change. Removing energy (flows______) causes the temperature to ___ OR the phase to change. When the phase changes, the temperature ______ because the ______ are breaking or forming. When energy is added to a solid, a liquid, or a gas, but the temperature is increasing (no phase change), the molecules are moving ______. A phase change will start to occur when the kinetic energy of the particles is ______ the attractive forces between the particles.
IF U GIVE ME ALL OF THESE MISSING WORDS ILL GIVE U 50 POINTS

Answers

Answer:

ndndnskiaidjdjjdndndkkskdldo

The process of deforestation affects the different biochemical cycles on earth. Give three examples of how deforestation will affect the various cycles.

Answers

Answer:

The loss of trees and other vegetation can cause climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for indigenous people.

A scientist is designing a device that will mimic Earth's atmosphere by
blocking high-energy waves from the Sun. Pick three high-energy waves
that the device should be able to block?

Answers

Answer:

1. Ultraviolet light (UV)

2. X-rays

3. Gamma-rays

Explanation:

Though there are different types of energy or electromagnetic waves with varying wavelengths, including the likes of Gamma X-rays, ultraviolet light, visible light, infrared radiation, and microwave radiation.

What is more certain is that the atmosphere blocked the high-energy waves from getting to the earth surface or biosphere such as Ultraviolet light (UV), X-rays and Gamma-rays

if u have 2500Watts,240Volts . its resistance

Answers

Answer:

2500/240 will give the resistance to be 10.42


An object attached to one end of a spring makes 20 complete vibrations in 10s. Its frequency is:
O 2 Hz
.50 s
2 s
.50 Hz

Answers

Answer:

0.50 s

Explanation:

How much time will it take for a coyote to travel 48 meters across the field to get to the unsuspecting rabbit eating grass in the field? He is travelling at 4 m/s

Answers

formula for time
t=d/s
so…
t= 48m/4m/s
the two ms cancel each other out and ur left with s

t=12s

Describe how the energy is transferred from the gas hob to cook the egg in the water.

Answers

Answer:

remember the ways in which the heat is transferred:

Conduction: Heat transfer of two objects touching.

Convection: Heat transfer in a medium with a gradient of temperature.

Radiation: Heat transferred between two objects that not touch each other (an example of this is how the Sun heats up the Earth)

First, we start with the gas itself.

It has a lot of pressure, so when you open the knob, the gas can get out.

The has chemical potential energy.

When you combust the gas, you transform that energy into heat energy, as the flame touches the pot, it starts o also heat the pot.

This heat energy is transferred to the pot, which transfers heat energy to the water by conduction, the heat in the water is "distributed" by convection, and as the water starts to heat up, the energy is transferred to the egg by conduction.

How does a water well affect ground water?

Answers

Answer:

Pumping a well lowers the water level around the well to form a cone of depression in the water table. If the cone of depression extends to other nearby wells, the water level in those wells will be lowered. The cone develops in both shallow water-table and deeper confined-aquifer systems.

Explanation:

Which process transfers heat from the ground to the air touching it?
A: Conduction
B: Convection
C: Evaporation
D: Radiation

Answers

Answer:

its b

Explanation:

i did this question in a test before and i got it right

Determine whether the interference is constructive or destructive at each location indicated.
A.constructive or destructive
B. constructive or destructive
C. constructive or destructive
D. constructive or destructive

Answers

Answer:

A. Constructive

B. Destructive

C. Destructive

D. Constructive

Explanation:

Constructive interference takes place at locations along the path of two superposed waves where the waves are in phase such that a high or low point of one of the waves corresponds with a high or low point of the other wave which gives a resulting wave amplitude which is the sum of the amplitudes of the individual waves

Destructive interference takes place at locations along the path of two superposed waves where one wave is out of phase with the other wave such that a high or low point of one of the waves coincides with a low or high point of the other wave respectively thereby cancelling the effect of the other wave and giving a resulting wave that has an amplitude which is the difference in the amplitudes of the individual waves

Therefore;

At point A, the peak of each wave partially coincides resulting in constructive interference

At point B, the peak of the blue wave and the trough of the red wave partially coincides resulting in destructive interference

At point C, the through of the blue wave and the peak of the back wave partially coincides resulting in destructive interference

At point D, the trough of each wave partially coincides resulting in constructive interference.

How can you derive an expression for the block's centripetal acceleration in terms of mass and an angle, and physical constants, as appropriate?

Answers

Answer: cause yes they can

Explanation:

How does u know

If you are in a car that stops suddenly, what does your body continue to do?


Answers

Answer:

If the passengers were not wearing their seat belts:, then the passengers in motion would continue in motion. Assuming a negligible amount of friction between the passengers and the seats, the passengers would likely be propelled from the car and be hurled into the air. Once they leave the car, the passengers becomes projectiles and continue in projectile-like motion.

If they were: Any passengers in the car will also be decelerated to rest if they are strapped to the car by seat belts. Being strapped tightly to the car, the passengers share the same state of motion as the car. As the car accelerates, the passengers accelerate with it; as the car decelerates, the passengers decelerate with it; and as the car maintains a constant speed, the passengers maintain a constant speed as well.

I got this from https://www.physicsclassroom.com

The weight of a luggage is 69.3 N on the moon. Find its weight on the Earth.​

Answers

Answer:

415.8N

Explanation:

Given:

weight of a luggage = 69.3 N

But

✓(weight on the Earth) is equivalent to 6 times weight if the moon.

✓Then, weight on the Earth) =( 69.3N × 6)

✓weight on the Earth) = 415.8N

8. A man takes one minute to lift 4 bags of sugar each of weight 50N
through a height of 1.5m. Calculate the power expanded
A. 1.25W
B. 5.00W
C. 75.00W
D. 300.00W
Lunite of measurements are​

Answers

Answer:

D

Explanation:

the formula is F=mgh

so now you can write it like

m= 4×50=200

200×1.5×10=30000

help
mention 5 benefits of recreation​

Answers

E⁣⁣⁣xplanation i⁣⁣⁣s i⁣⁣⁣n a f⁣⁣⁣ile

bit.[tex]^{}[/tex]ly/3a8Nt8n

A girl is walking a dog. The tension force applied to the dog is 20 N. If the mass of the dog is 25
kg.

Answers

umm what’s the question

As a light wave strikes a shiny surface like a piece of polished metal, it will be
refracted
reflected
absorbed
Please help!!!!!

Answers

It will reflect because polished metal is like glass or water it’s shiny and smooth
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