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3 years ago

If an object undergoes a change in momentum of 10 kg m/s in 3 seconds what is the force?

Physics

1 answer:

kolbaska11 [484]3 years ago

7 0

Answer:

The correct equation for calculating force is change in momentum divided by time. So 10 kg m/s divided by 3 s is 3.3 newtons (N

Explanation:

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To run the physics cart, the fan speed of the cart is manipulated. This is the (blank) variable. The cart accelerates due to the

vlabodo [156]

Answer:

A) Independent

B) Dependent

C) Mass

Explanation:

The speed applied to the physics cart is manipulated. This doesn't depend on another variable. Thus, speed is the (independent) variable.

The cart accelerates due to the speed applied to the cart. Acceleration depends on the speed applied. Thus, acceleration is therefore the (dependent) variable.

A “constant” is a parameter that remains the same regardless of the variables.

One parameter of the cart that is held constant is the (mass).

6 0

3 years ago

In a physics experiment, two equal-mass carts roll towards each other on a level, low-friction track. One cart rolls rightward a

xz_007 [3.2K]

Answer:

The correct answer is option a.

Explanation:

Conservation of momentum :

$m_1u_1+m_2u_2=m_1v_1+m_1v_2$

Where :

$m_1, m_2$ = masses of object collided

$u_1,u_2$ = initial velocity before collision

$v_1,v_2$ = final velocity after collision

We have :

Two equal-mass carts roll towards each other.

$m_1=m_2=M$

Initial velocity of $m_1=u_1=2 m/s$

Initial velocity of $m_2=u_2=-1 m/s$ (opposite direction)

Final velocity of $m_1=v_1=v$ (same direction )

Final velocity of $m_2=v_2=v$ (same direction)

$M\times 2 m/s+M(-1 m/s)=Mv+Mv$

$1 m/s=2v$

v = 0.5 m/s

rg135

The speed of the carts after their collision is 0.5 m/s.

7 0

4 years ago

A lightbulb has a power of 100 W and is used for 4 hours. A microwave has a power of 1200 W and is used for 5 minutes. How much

ladessa [460]

Answer:

a. E=1440KJ

b. E=360KJ

c. E=1.8 J

Explanation:

I have the power (Watts) is expressed as Energy (Joules) / Time (seconds), also I have to $1hour * \frac{60min}{1hour}*\frac{60s}{1min}\\1h=3600s$

so, for the lightbulb

$100W= \frac{Energy}{3600s*4}\\Energy=100W*14400s\\ E=1440000J =1440KJ$

Analogously, for the microwave

$1200W= \frac{Energy}{60s*5}\\Energy=1200W*300s\\ E=360000J =360KJ$

Now, I have to express the efficiency as Heat energy / power * 100 so $1.8= \frac{Heat Energy}{100W}*100\\Heat Energy=1.8J$

Done

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4 years ago

What is the total number of electrons transported from the positive electrode to the negative electrode from the time the batter

katovenus [111]

Answer:

16200

Explanation:

4 0

4 years ago

What happens when aluminum fills its valence shell?

Juliette [100K]

I beileve the answer is B

4 0

4 years ago

Read 2 more answers