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3 years ago

When illustrating relative dating by

Physics

1 answer:

Rainbow [258]3 years ago

8 0

Answer:

A The Bottom

Explanation:

Brainlist Tho??

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Which of these are not a natural resources: solar energy, wood, iron, diamonds.

Tcecarenko [31]

Diamonds and iron, as they can't be easily put back or recreated. Remember to make sure yourself.
Hope this helps :)

5 0

3 years ago

What effect does a parachute have on the frictional force acting on the parachutist?

Schach [20]

Answer: Air resistance and/or drag.

Explanation: The parachute adds drag to the parachutist, thus making him fall slower and safely to the ground.

4 0

3 years ago

Net force = ?

Snezhnost [94]

Answer:

A. the total net force is 14

B. the total net force is 15

Explanation:

7 0

4 years ago

If the equation of an average velocity of a sport car was given by the equation V(t) = 3t^2 -6t +24. Determine its displacement

alisha [4.7K]

Answer:

Explanation:

The displacement of an object can be found from the velocity of the object by integrating the expression for the velocity.

In this problem, the velocity of the sport car is given by the expression

$v(t)=3t^2-6t+24$

In order to find the expression for the position of the car, we integrate this expression. We find:

$x(t)=\int v(t) dt=t^3-3t^2+24t+C$

where C is an arbitrary constant.

Here we want to find the displacement after 3 seconds. The position at t = 0 is

$x(0)=0^3-0+0+C=C$

While the position after t = 3 s is

$x(3)=3^3-3(3)^2+24(3)+C=72+C$

Therefore, the displacement of the car in 3 seconds is

$d=x(3)-x(0)=72+C-C=72$

7 0

3 years ago

un motor electric efectueaza un lucru mecanic de 864 j in 0.5 min.tensiunea la bornele sale este de 12v si este parcurs de un cu

GrogVix [38]

Answer:

96%

Explanation:

To find the values of the motor efficiency you use the following formula:

$E=\frac{P_o}{P_i}100$

P_o: output power = 864J/0.5min=864J/30s=28.8W

P_i: input power = I*V = (3A)(12V) = 36W

By replacing this values you obtain:

$E=\frac{28.8W}{30W}*100=96\%$

hence, the motor efficiency is about 96%

traslation:

Pentru a găsi valorile eficienței motorului, utilizați următoarea formulă:

P_o: putere de ieșire = 864J / 0.5min = 864J / 30s = 28.8W

P_i: putere de intrare = I * V = (3A) (12V) = 36W

Înlocuind aceste valori obțineți:

prin urmare, eficiența motorului este de aproximativ 96%

3 0

3 years ago