PHYSICS HIGH SCHOOL

A toaster with a power rating of 1,000 watts is plugged into a household voltage of 120 volts. How much current runs through the toaster? A) 120,000 amps
B) 880 amps
C) 8.3 amps
D) 0.120 amps

Answers

Answer 1

Answer:

Answer : I = 8.33 A

Explanation :

It is given that,

Power rating of the toaster, P = 1000 watts

Household voltage, V = 120 volts

We know the relation between power, voltage and the current is :

$P=V* I$

$I=(P)/(V)$

$I=(1000\ W)/(120\ V)$

$I = 8.33\ A$

8.33 A of current runs through the toaster.

Hence, this is the required solution.

Answer 2

Answer: C) 8.3 i believe i wouldnt take me 100%

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A bumper car with a mass of 200 kilograms traveling at a velocity of 3.5 meters/second collides with a stationary bumper car with a mass of 250 kilograms. If the two bumper cars stick and move together at a velocity of 2.3 meters/second, what is the kinetic energy of the system after the collision

Answers

A bumper car with a mass of 200 kilograms traveling at a velocity of 3.5 meters/second collides with a stationary bumper car with a mass of 250 kilograms. the kinetic energy of the system after the collision is 1190,25 J.

what are types of energy ?

The energy is the ability to work or produce action or movement and it manifests itself in many different ways mostly body movement, heat, electricity, etc.

The different types of energy are Kinetic energy is associated with the movement of bodies. Potential energy which is stored form of energy by virtue of a body's position relative to its surface is also called gravitational potential energy.

Thermal Energy associated with the kinetic energy of the molecules that make up an element, Chemical energy released from chemical reactions, Solar energy released from sunlight.

Ek = (m·V²)/2

V - velocity of system after the collision

m = m1 + m2

Ek = (m1 + m2)·V²/2

Ek = (200 +250)·2,3²/2 = 450·5,29/2 = 1190,25 J

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Ek = (m·V²)/2
V - velocity of system after the collision
m = m1 + m2

Ek = (m1 + m2)·V²/2
Ek = (200 +250)·2,3²/2 = 450·5,29/2 = 1190,25 J

If a wave has a frequency of 8hz it has a period of

Answers

The required period of the wave is 0.125 seconds.

What is the frequency and time period?

In physics, frequency and period are two related concepts that are used to describe the properties of waves. Period, on the other hand, is a measure of the time it takes for one complete cycle of a wave.

Frequency is a measure of how many cycles of a wave occur in one second. It is measured in units of Hertz (Hz), which is defined as cycles per second.

Here,
The period (T) of a wave is the time it takes for one complete cycle of the wave. It is related to the frequency (f) of the wave by the formula:

T = 1/f

Where T is in seconds and f is in Hertz (Hz).

Given that the frequency of the wave is 8 Hz, we can calculate the period as follows,

T = 1/f

T = 1/8

T = 0.125 seconds

Therefore, the period of the wave is 0.125 seconds.

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1/8 seconds is the period.

Simon draws a diagram to illustrate the law of reflection.Which best explains how Simon can correct the error in his diagram?

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Make the angle of incidence larger than the angle of reflection.

Answers

Answer:

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Explanation:

The law of reflection states that at the point of incidence on a smooth surface, the angle of incidence is equal to the angle of reflection, The incident ray, the normal and the reflected ray lie on the same plane.

Answer:

B. Make the angle of reflection and the angle of incidence equal

Explanation:

Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group. How does this help explain the difference in the reactivity of metals within a group?

Answers

Well formation of metallic bond depends on free electrons.smaal sized atoms hold their electrons more firmly as compared to large size atoms ,this z due to distance of outer shell electrons by nucleus..in this way no of free electrons affect strength of metallic bond..smaal sized atoms release less free electrons..

Answer:

Explanation:

Prove that an electron cannot exist in the nucleus

Answers

We can say this is proved because electrons are having negative charges. If they lie inside the nucleus, they will be neutralised by the positive charges. Thus, the atom will have no charged particle and unstable. But an atom has both positive and negative charges.

For a winter fair, some students decide to build 30.0 kg wooden pull carts on sled skids. If two 90.0 kg passengers get in, how much force will the puller have to exert to move a pull cart? The coefficient of maximum static friction between the sled skids and the road is 0.15