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Rina8888 [55]
2 years ago
15

Scientific notation. jst 11a

Physics
1 answer:
coldgirl [10]2 years ago
5 0

Answer:

2 * 10^4

Explanation:

(3 * 10^4)(4 * 10^4) / (6 * 10^4)

= (12 * 10^8)/(6 * 10^4)

= 2 * 10^4

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If you used 650 W of power lifting a 300 N weight in 2 seconds how high did you lift?
dimulka [17.4K]

Answer:

4.33m

Explanation:

Power = work done/ time

work done = power × time =650 × 2 = 1300J

work done = force × distance

distance = work done/force

distance = 1300/300 = 4.33m

7 0
3 years ago
a car moving with 72 km/hr towards east and another car with 90km/hr towards west find relative of A w.r to B​
hodyreva [135]

Answer:

please tell me what does w.r mean ? then I will try to give answer

7 0
3 years ago
A 38.5kg man is in an elevator accelerating downward. A normal force of 343n pushes up on him. what is his acceleration?
alexira [117]

Answer:

<h3>The answer is 8.91 m/s²</h3>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m}  \\

f is the force

m is the mass

From the question we have

a =  \frac{343}{38.5}  =  \frac{98}{11}  \\  = 8.909090...

We have the final answer as

<h3>8.91 m/s²</h3>

Hope this helps you

4 0
3 years ago
The springs of a 1000 kg car compress 5.5 mm when its 68 kg driver gets into the driver's seat. If the car goes over a bump, wha
zimovet [89]
1. Find the spring constant k:

F = mg = kx
68 * g = k * 0.0055m

k = 121287.273

2.Find the frequency f:
ω = 2πf = √k/m 

f = √(k / m)/ 2π =  1.7
4 0
3 years ago
HELP ME FOR NUMBER 1 THROUGH 4
Svetach [21]
1. 20/20 - 16/20= 4/20
20x5=100 4x5=20
20%
8 0
3 years ago
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