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Natasha2012 [34]

3 years ago

15

Characteristics of highly sensitive galvonometer

1 answer:

torisob [31]3 years ago

7 0

A resistance of 990ohm is increased by 10

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What are some ways scientists can study the seafloor?

TiliK225 [7]

Answer: A device records the time it takes sound waves to travel from the surface to the ocean floor and back again. Sound waves travel through water at a known speed. Once scientists know the travel time of the wave, they can calculate the distance to the ocean floor.

Explanation:

4 0

3 years ago

Read 2 more answers

A 710 kg car drives at a constant speed of 23 m/s. It is subject to a drag force of 500 N. What power is required from the car's

inn [45]

Explanation:

Given that,

Mass of the car, m = 710 kg

Speed of the car, v = 23 m/s

Drag force, F = 500 N

(a) Let P is the power is required from the car's engine to drive the car on the level ground. Power is given by :

$P=F\times v\\\\P=500\ N\times 23\ m/s\\\\P=11500\ W$

(b) Let P is the power is required from the car's engine to drive the car on up a hill with a slope of 2 degrees.

At this slope, force will be, $F=mg\ \sin\theta$

Total force will be :

$F=710\times 9.8\times \sin(2)+500\\F=742.83\ N$

Power is given by :

$P=F\times v\\\\P=742.83\times 23\\\\P=17085.09\ W$

or

P = 17 kW

5 0

4 years ago

If the mass of an object is 200kg and the applied force is 2600N, calculate the Acceleration.

Aliun [14]

Answer:

<em>13 m/s²</em>

Explanation:

Mass of object = 200 Kg

Applied force = 2600 N

Acceleration = ?

Solution:

Definition:

The acceleration is rate of change of velocity of an object with respect to time.

Formula:

a = Δv/Δt

a = acceleration

Δv = change in velocity

Δt = change in time

Units:

The unit of acceleration is m.s⁻².

Acceleration can also be determine through following formula,

F = m × a

a = F/m (N = kgm/s²)

a = 2600 kgm/s² / 200 Kg

a = 13 m/s²

6 0

3 years ago

When a nerve cell fires, charge is transferred across the cell membrane to change the cell's potential from negative to positive

goldenfox [79]

Answer:

The average current will be "17.69 nA".

Explanation:

The given values are:

Charge,

q = 9.2 pC

Time,

t = 0.52ms

The equivalent circuit of the cell surface is provided by:

⇒ $i_{avg}=\frac{charge}{t}$

Or,

⇒ $i_{avg}=\frac{q}{t}$

On substituting the given values, we get

⇒ $=\frac{9.2\times 10^{-12}}{0.52\times 10^{-3}}$

⇒ $=17.69^{-9}$

⇒ $=17.69 \ nA$

3 0

4 years ago

At 96Â° F the saturation density of air is 0.04 kg/m3. If the weather report says the relative humidity is 90 % when the tempera

nalin [4]

Answer:

The value is $H = 0.036 \ kg/m^3$

Explanation:

From the question we are told that

The saturation density of air is $\rho = 0.04 \ kg/m^3$

The temperature for this saturation density to occur $T_s = 96^o F$

The relative humidity at this temperature is $R_h = 90\% = 0.90$

Generally the relative humidity is mathematically represented as

$R_H = \frac{H}{\rho}$

Here H represents humidity

=> $0.90 = \frac{H}{0.04}$

=> $H = 0.90 * 0.04$

=> $H = 0.036 \ kg/m^3$

8 0

3 years ago