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Lapatulllka [165]
3 years ago
15

Take a look at a bicycle with gears. Using what you have just learned, answer the following questions:

Physics
1 answer:
Harlamova29_29 [7]3 years ago
4 0

Answer:

answer a: a large front gear with a small back gear

answer b: a small front gear with a large back gear

Explanation:

just simple gearing ratios

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Two point charges, 1.8 pC and −1.8 pC, are separated by 7 µm. What is the dipole moment of this pair of charges?
Salsk061 [2.6K]

Answer: 12,600,000Cm

Explanation:

From the data's;

Charges(q) = 1.8 PC equal to 1.8 x 10^¹²C

Distance = 7 micrometer, is equal to 0.0000070m

From the equation of electric dipole moment, p= q x d, where q= charge, d=distance and p is the dipole moment.

Then we have 1.8x10^¹² x 0.0000070= 12,600,000Cm

NB: The charges are identical.

3 0
3 years ago
A 1.7 kg model airplane is flying north at 12.5 m/s initially, and 25 seconds later is observed heading 30 degrees west of north
maxonik [38]

Answer:

Average net force = 0.62 N

Explanation:

We are given;

Mass; m = 1.7 kg

Initial velocity; u = 12.5 m/s

Final velocity; v = 25 m/s

time; t = 25 seconds

Now, we are told that the final velocity was 30° west of North. So, resolving this velocity along the horizontal gives;

v = 25 cos 30°

Now, using Newton's first equation of motion gives;

v = u + at

Where a is acceleration

Plugging in the relevant values gives;

25 cos 30° = 12.5 + 25a

21.6506 - 12.5 = 25a

a = (21.6506 - 12.5)/25

a = 0.3660 m/s²

Now, magnitude of the average net force would be; F = ma

F = 1.7 × 0.366

F ≈ 0.62 N

5 0
4 years ago
When unequal resistors are connected in series across an ideal battery,the same power is dissipated in each one.the potential di
Agata [3.3K]

Answer:

the current flowing in each is the same.

Explanation:

When resistors are connected in series, they are connected in the same branch of the circuit - this means that the same current flows through each resistor.

The other options listed are wrong because:

the same power is dissipated in each one --> false: the power dissipated in each resistor is P=I^2 R, where I is the current and R the resistance, so it depends on the value of the resistance

the potential difference across each is the same.-- > false: this is true in parallel circuits, not series circuits

the equivalent resistance of the circuit is less than that of the smallest resistor.--> false: the equivalent resistance of a series circuit is the sum of the individual resistances: R = R_1 + R_2 + ..., so it is larger than the resistance of the smallest resistance

the equivalent resistance of the circuit is equal to the average of all the resistances. --> false: the equivalent resistance of a series circuit is the sum of the individual resistances: R = R_1 + R_2 + ..., not the average

7 0
3 years ago
What will happen if the reverberation time in a big hall is too long? How can we reduce it?
77julia77 [94]
Reverberation is the persistence of sound due to repeated reflection, where an echo may be heard.  We can reduce the reverberation by covering the roof and the wall of the hall with sound absorbing materials like <span>Acoustical panels, Noise and sound isolation foams, MLV ( Mass Loaded Vinyl)  Soundproofing foam, etc.</span>
6 0
3 years ago
Read 2 more answers
Two identical cylinders, A and B, contain the same type of gas at the same pressure. Cylinder A has twice as much gas as cylinde
ANEK [815]

Answer:

Explanation:

Gas law equation for any gas is as follows .

PV = nRT ( for n moles of gas )

Let the pressure , volume , temperature and mole of gas in cylinder A be P,V

T₁ and 2n . Pressure , volume , temperature and mole in cylinder B will be

P , V , T₂ and n.

Applying Gas laws , we get

For gas in cylinder A

PV = 2n R T₁

For gas in cylinder B

PV = n R T₂

Equating these equations , we get

2n R T₁ = n R T₂

2 T₁ = T₂

or,

2T_A =T_B

T_A is less than T_B

4 0
3 years ago
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