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iris [78.8K]
2 years ago
7

Can you help me please?

Physics
2 answers:
sukhopar [10]2 years ago
6 0
The answer to your question is A!
stich3 [128]2 years ago
3 0

Answer:

a/ oscillating charges

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At what height h above the ground does the projectile have a speed of 0.5v?
dedylja [7]

Answer:height above ground at which projectile have velocity

0.5v is (0.0375v^2)

Explanation:

Using Vf = Vi - gt

Where Vf is final velocity

Vi is initial velocity

g is the acceleration due to gravity

t is the time taken

So, 0.5v = v - gt

t = 0.05v

Therefore height h = vt - 0.5gt^2

Subtitute t

h = 0.05v^2 - 0.0125v^2

h = 0.0375v^2

3 0
2 years ago
1. Write the advantages and disadvantages of connecting lamps (a) in series and (b) in parallel. A3 2. a) 0.2A Draw Fig 5.30 int
spin [16.1K]

Answer:

parallel connection:Advandages: 1. Every unit that is connected in a parallel circuit gets equal amount of voltage.2. It becomes easy to connect or disconnect a new element without affecting the working of other elements.3. If any fault happened to the circuit, then also the current is able to pass through the circuit through different paths.Disadvantages: 1. It requires the use of lot of wires.2. We cannot increase or multiply the voltage in a parallel circuit.3. Parallel connection fails at the time when it is required to pass exactly same amount of current through the units.series connection:Advantages: 1. Series circuits do not overheat easily. This makes them very useful in the case of something that might be around a potentially flammable source, like dry plants or cloth.2. Series circuits are easy to learn and to make. Their simple design is easy to understand, and this means that it’s simple to conduct repairs .3. we can add more power devices, they have a higher output in terms of voltage .4. The current that flows in a series circuit has to flow through every component in the circuit. Therefore, all of the components in a series connection carry the same current.Disadvantages: 1.If one point breaks in the series circuit,the total circuit will break.2. As the number of components in a circuit increases ,greater will be the circuit resistance.

7 0
2 years ago
An industrial overhead door has a chain and sprocket system designed to reduce the force needed by an operator to open and close
mylen [45]
GR/1=nout/nin = 48/22=2.18/1
4 0
3 years ago
2. A large pack of snow of mass m sits at the top of a trail at a ski resort. Friction keeps the snow pack in place, but when it
Aleks [24]

Answer:

tanΘ

Explanation:

Let gravitational acceleration be g. When the avalanche starts to occur, the gravity force that is parallel to the slope is the same as friction force.

Gravity force that is parallel to the slope can be written as:

G = mgsinΘ

The friction force is the product of normal force and coefficient:

F_f = N\mu

where normal force N is the gravity in the direction perpendicular to the slope

F_f = \mu mgcos\theta

As stated before, gravity force that is parallel to the slope is the same as friction force:

G = F_f

mgsin\theta = \mu mgcos\theta

\mu = sin\theta / cos\theta = tan\theta

8 0
3 years ago
a = v1-v2/t equation is the equation for calculating the acceleration of an object. Write out the relationship shown in the equa
Lena [83]
My answer is. Acceleration is the difference between velocities at two times divided by the difference in the times.
5 0
3 years ago
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