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3 years ago

Help Please I will Give The Brainliest! (SCIENCE)

Physics

1 answer:

kap26 [50]3 years ago

5 0

Answer:

Hope this will help you.

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11. When an object is speeding up in the positive direction, what vs happering to its

Alina [70]

Answer:

im pretty sure its b

Note that when the acceleration is negative — on the interval [0, 2) — that means that the velocity is decreasing. When the acceleration is positive — on the interval (2, 4] — the velocity is increasing. Speeding up and slowing down.

4 0

3 years ago

A French submarine and a U.S. submarine move toward each other during maneuvers in motionless water in the North Atlantic. The F

Mandarinka [93]

Answer:

$f_{U}= 1019.72hz$

Explanation:

From the equation we are told that:

Velocity of French sub $V_{U}= 43.00km/h$

Velocity of U.S. sub at $V_{F}|=64.00 km//h$

French Wave Frequency $F_{F}=1000Hz$

Velocity of wave $V_{s}=5470 km/h$

Generally the equation for Signal's frequency as detected by the U.S. is mathematically given by

Doppler effect

$f_{U} = \frac{ f_F (vs + v_{U})}{(v_s - v_F) }$

$f_{U}= \frac{ 1000 x ( 5470+64)}{(5470-43)}$

$f_{U}= 1019.72hz$

5 0

3 years ago

How is wind generated?

just olya [345]

Answer:

Explanation:

Wind is caused by the uneven heating of the atmosphere by the sun, variations in the earth's surface, and rotation of the earth. ... Wind turbines convert the energy in wind to electricity by rotating propeller-like blades around a rotor. The rotor turns the drive shaft, which turns an electric generator

6 0

3 years ago

Find the equivalent resistance, the current supplied by the battery and the current through each resistor when the specified res

VLD [36.1K]

Answer:

$R_{eq}$ = 19 Ω, I = 0.105 A, V1 = 1.05 V and V2 = 0.95 V

Explanation:

The correct way to solve this type of problem is to find the current or voltage values for the equivalent resistance and from here find the other values.

For a series circuit the equivalent resistance is the sum of the resistance

$R_{eq}$ = R1 + R2

$R_{eq}$ = 10 +9

$R_{eq}$ = 19 Ω

Let's use the equation for the voltage

V = I $R_{eq}$

I = V / $R_{eq}$

I = 2/19

I = 0.105 A

In a series circuit the current is constant, so let's use the voltage equation for each resistor

V1 = I R1

V1 = 0.105 10

V1 = 1.05 V

V2 = 0.105 9

V2 = 0.95 V

Note that the sum of this voltage is the total voltage applied.

6 0

3 years ago

Reacting with water in an acidic solution at a particular temperature, compound A decomposes into compounds B and C according t

Diano4ka-milaya [45]

Answer:

after t = 3 hours compound A remain 0.396 M

t = 12.98 hours

Explanation:

P = P_0*e^(-kt)

t = 30 minutes = 30/60 hours = 0.5 hours

and P_0 = 0.60M

and P after t = 0.5 hours is 0.56 M

(0.56/0.6) = e^(-kt)

0.933 =e^(-kt)

k = 0.138

P = P_0*e^(-0.138t)

Now after t = 3 hours,

P = 0.6* e^((-0.138)*3) = 0.396 M

time when P = 0.1 M

0.1 = 0.6*e^(-0.138t)

t = 12.98 hours

8 0

3 years ago