Specific gravity of steel = density of steel / density of water
brainliest pls
Enertia es el answer de tu question
Answer:
a) 20 m/s
b) 37.5 m)s
Explanation:
Average speed = total distance ÷ total time
=> (a) average speed of a car that travels 400m in 20s
= 400/20 = 20 m/s
& (b) average speed of an athlete who runs 1500m in 4 minutes (or 4×60=240 seconds)
= 1500/240 = 37.5 m/s
Answer:
The distance the car travels is 115500 m in S.I units
Explanation:
Distance d = vt where v = speed of the car and t = time taken to travel
Now v = 99 km/h. We now convert it to S.I units. So
v = 99 km/h = 99 × 1000 m/(1 × 3600 s)
v = 99000 m/3600 s
v = 27.5 m/s
The speed of the car is 27.5 m/s in S.I units
We now convert the time t = 70 minutes to seconds by multiplying it by 60.
So, t = 70 min = 70 × 60 s = 4200 s
The time taken to travel is 4200 s in S.I units
Now the distance, d = vt
d = 27.5 m/s × 4200 s
d = 115500 m
So, the distance the car travels is 115500 m in S.I units
<h3><u>Answer</u>;</h3>
= 2493 W
<h3><u>Explanation</u>;</h3>
The total resistance of 3 resistors in series = R + R + R = 3 * R
The total resistance of 3 resistors in parallel = 1 ÷ (1/R + 1/R + 1/R) = ⅓ R
At the same voltage, V, the total current in the series circuit will be
= V ÷ (3 * R)
= ⅓ * V/R.
At the same voltage, V, the total current in the parallel circuit will be;
= V ÷ (⅓ R)
= 3 * V/R
At the same voltage, the parallel circuit will have 9 times the amperage of the series circuit.
Power = Volts * amps
Power of series circuit = V * ⅓ * V/R = ⅓ * V^2/R
Power of parallel circuit = 3 * V^2/R
But, power of series is 277 W
1/3 (V²/R) = 277
(V²/R) = 277 × 3
Power in parallel = 3 V²/R
= 277 × 3 × 3
<u> = 2493 W</u>