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nydimaria [60]
3 years ago
12

What is the total current for the circuit? (must include unit - A) I WILL GIVE BRAINLIEST!

Physics
1 answer:
Iteru [2.4K]3 years ago
3 0

Answer:2 amperes

Explanation:

Voltage=120v

Total resistance=15+15+30

Total resistance=60 ohms

Current=voltage ➗ resistance

Current=120 ➗ 60

Current=2 amperes

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I need help with my homework please? I will give a lot of points and a brainlist.
Sladkaya [172]

Answer:

1. False

some metals are ferromagnetic

2.True

3. True

4. True

5. False

The strength of electromagnetic can be increased by increasing the number of wire around it

4 0
2 years ago
Which of the following will cause an increase in gas pressure in a closed container? A. Lowering the temperature B. Reducing the
choli [55]
D. both B and C will cause gas pressure to decrease because adding more gas is like adding more energy and reducing the space (volume) the atoms will move more quickly but won't have space, therefore pressure will increase.
5 0
3 years ago
Read 2 more answers
Find the least frequency of incident light that will knock electrons out of the surface of a metal with a work function of 3eV.​
mixer [17]

Answer:

The frequency must be: 725\,\,10^{12} \,Hz

Explanation:

If the work function of the metal (\phi) is 3 eV, then we can use the formula for the kinetic energy of an ejected electron:

KE= h*f-\phi

considering for the minimum KE = 0, and using the Plank constant h in eV s as: 4.14 * 10 ^(-15) eV s, to solve for the frequency:

h*f=\phi\\4.14*10^{-15} * f = 3\\f=3*10^{15}  /4.14\,\,\frac{1}{s} \\f=725\,10^{12} \,Hz

3 0
2 years ago
when a traffic accident is investigated, it is common for the length of the skid marks to be measured. how could this informatio
Dvinal [7]

This information could be used in the following ways: the braking distance of a skidding car will depend on its initial speed and the coefficient of kinetic friction.

Thus, if the coefficient of friction is known the initial speed can be determined from the length of the skid marks.

What do you mean by Initial speed?

Initial speed can be described as  how fast an object travels when gravity first applies force on the object. It can be represented in the form of (u) and is generally measured in metres per second (m/s).

It can be represented in three ways.

  • v2=u2+2as
  • v=u+at
  • s=ut+0.5at2

Through these formulas we can calculate the initial speed of any object. It helps in understanding various velocities, time principles.

To know more about initial speed from the given link

brainly.com/question/26116359

#SPJ4

6 0
1 year ago
It is 5.0 km from your home to the physics lab. As part of your physical fitness program, you could run that distance at 10 km/h
Ostrovityanka [42]

Answer:

Walking burns up more energy,1740000J

Explanation:

Given that the displacement is 5.0km, and running at 10km/h and uses, walking at 3km/hr and uses 290watts:

Energy consumption for running is calculated as:

700watts=700j/s,d=5000m,v=\frac{25}{9}m/s\\\\\therefore E_c=\frac{d}{v}\times Energy \ usage\\\\=\frac{5000}{\frac{25}{9}}\times 700j/s\\\\=1260000J

Energy consumption for walking is calculated as:

290watts=290j/s,d=5000m,v=\frac{5}{6}m/s\\\\\therefore E_c=\frac{d}{v}\times Energy \ usage\\\\=\frac{5000}{\frac{5}{6}}\times 290j/s\\\\=1740000J

Walking is a slower process hence the need for more energy over longer periods  raltive to running the same distance.

Hence walking burns more energy; 1,740,000J. It burns more because you walk for a greater period of time.

5 0
3 years ago
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