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Hatshy [7]
4 years ago
9

HELP PLEASE!! what will happen if you add a stronger battery to an electromagnet?? ​

Physics
1 answer:
Gala2k [10]4 years ago
6 0

The electromagnetic force will be stronger since the electromagnet get it's force from the battery.

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A car moving at 10 m/s approaches a hill. If the car were put in neutral, it would roll up the hill to a stop at a certain eleva
dmitriy555 [2]

Answer:

They will not stop at same elevation

for v=10m/2 => h=5.1m

for v=20m/2 => h=20.4m

Explanation:

If we neglect the effects of friction in the calculations the energy if the system must be conserved. The car energy can be described as a combination of kinetic energy and potential energy:

E=K+P

The potential energy is due to the gravitational forces and can be describes as:

P=g*h*m

Where g is the gravitation acceleration, m the mass of the car, and h the elevation. This elevation is a relative quantity and any point of reference will do the work, in this case we will consider the base of the hill as h=0.

The kinetic energy is related to the velocity of the car as:

K=1/2*m*v^{2}

As the energy must be constant E will be always constant, replacing the expressions for kinetic and potenctial energy:

E=1/2*m*v^{2}+g*h*m

In the base of the hill we have h=0:

E_{base} =1/2*m*v^{2}

When the car stops moving we have v=0:

E_{top} =g*h_{top}*m

This two must be equal:

E_{base} =E_{top}

1/2*m*v^{2} =g*h_{top}*m

solving for h:

h_{top} =\frac{v^{2}}{2*g}

Lets solve for the two cases:

for v=10m/2 => h=5.1m

for v=20m/2 => h=20.4m

As you can see, when the velocity is the double the height it reaches goes to four times the former one.

3 0
3 years ago
U will be marked as brainlest if u solve this!! Plz help! <br>I need answers from 3 to 6​
Aleksandr [31]

Explanation:

3 mg=kx

4 mg=0.3×10

kx=3

5. gravitational force and spring force are applied on bloc.

get step by step answer by mail

3 0
3 years ago
You are in a fire truck heading directly toward a tunnel in a mountainside at 17m/s. you hear the truck's 90Hz siren as well as
Kryger [21]

Hey there!:

Take the speed of sound to be 343m/s.

Direct frequency perceived by observer:

(343 + 17) / 343) * 90Hz = 94.460Hz

Change in frequency = ( 4.460 - 90 ) = 4.460Hz.  

90 - (4.460 x 2) = 81.08 Hz. indirect frequency heard by observer.  

Therefore :

Beat frequency = (94.460 - 81.08) = 13.38Hz.  

Hope this helps!

4 0
4 years ago
A parallel-plate capacitor with circular plates is charged by a constant current i. the radius a of the plates is much larger th
Fed [463]

1. The problem statement, all variables and given/known data A parallel-plate capacitor of capacitance C with circular plates is charged by a constant current I. The radius a of the plates is much larger than the distance d between them, so fringing effects are negligible. Calculate B(r), the magnitude of the magnetic field inside the capacitor as a function of distance from the axis joining the center points of the circular plates. 2. Relevant equations When a capacitor is charged, the electric field E, and hence the electric flux Φ, between the plates changes. This change in flux induces a magnetic field, according to Ampère's law as extended by Maxwell: ∮B⃗ ⋅dl⃗ =μ0(I+ϵ0dΦdt). You will calculate this magnetic field in the space between capacitor plates, where the electric flux changes but the conduction current I is zero.

7 0
3 years ago
What is the density of an object with a mass of 120g and a volume of 7ml
mel-nik [20]
Density=mass divided by volume, so d=120g/7ml
3 0
3 years ago
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