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ivanzaharov [21]

3 years ago

8

Why is net force a vector sum A.All forces have direction and magnitude B.Forces can only be attractive C.All forces are contact

forces D.There are four fundamental forces

1 answer:

Alexus [3.1K]3 years ago

3 0

Answer:

A

Explanation:

Forces are vector quantities because they have both magnitude and direction.

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Just wanna make sure im right

NikAS [45]

It is right have a good day

explanation step by step

6 0

3 years ago

Help<br> How much current will flow when a 120 V power supply is connected to a 30<br> resistor ?

AVprozaik [17]

Current= voltage divided by resistance
120/30=4

7 0

3 years ago

What are some examples of gravitational forces that keep an object in orbit? Pls give at least 2-3 example if you can.

Lelu [443]

Answer:

Without any external forces a moving object will continue to move in a straight line. The gravitational force between the two objects will provide the centripetal force to keep the objects moving around one another.

1. satellite in orbit around the earth (motion of earth is negligible)

2. moon in orbit around the earth (center of motion several thousand miles

from center of earth)

3. earth in orbit around sun (center of rotation close to center of sun)

4. binary stars (if masses of stars are equal center of rotation is in middle)

3 0

3 years ago

Substitute the value 26.7 (or the exact value of 80/3) for x in the first of the original equation (x + y = 40) to find the valu

Tatiana [17]

Complete Question

The complete question is shown on the first uploaded image

Answer:

the value of $y = 13.3$

Explanation:

From the question we are told that

The equation is (x + y = 40)

The first value of x is $x_1 = 26.7$

The second equation is (0.75x + 1.5y = 40)

So substituting $x_1$

$26.7 + y = 40$

=> $y = 13.3$

Now substituting y and $x_1$ into second equation

$0.75(26.7) + (1.5* 13.3) = 40$

=> $40 = 40$

So $y = 13.3$

4 0

3 years ago

A 5.00 g bullet traveling 355 m/s is stopped by lodging in the side of a building. The heat produced is shared between the build

steposvetlana [31]

Answer:

Explanation:

Given

mass of bullet $m=5\ gm$

speed of bullet $v=355\ m/s$

bullet is stopped by building and heat produced is shared between building and bullet

Kinetic Energy of bullet is converted into Thermal energy

Kinetic Energy of bullet $K=\frac{1}{2}mv^2$

$K=0.5\times 5\times 10^{-3}\times (355)^2$

$K=315.06\ J$

So 315.06 J of Energy is converted in to thermal energy

7 0

3 years ago