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4 years ago

What is the solution to -6+5(1-x) =- 13–7x

Physics

2 answers:

IgorLugansk [536]4 years ago

7 0

Answer:

x = -6

Explanation:

Bumek [7]4 years ago

7 0

Answer:

x=-6

Explanation:

−6+5(1−x)=−13−7x

−6+(5)(1)+(5)(−x)=−13+−7x(Distribute)

−6+5+−5x=−13+−7x

(−5x)+(−6+5)=−7x−13(Combine Like Terms)

−5x+−1=−7x−13

−5x−1=−7x−13

Step 2: Add 7x to both sides.

−5x−1+7x=−7x−13+7x

2x−1=−13

Step 3: Add 1 to both sides.

2x−1+1=−13+1

2x=−12

Step 4: Divide both sides by 2.

2x/2=-12/2

x=−6

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A projectile is launched with an initial velocity 60m/s at an angle 60° to the vertical. What the magnitude of it's displacement

emmasim [6.3K]

Answer:

the magnitude of the displacement after 5s is 137.31 m.

Explanation:

Given;

initial velocity of the projectile, u = 60 m/s

angle of projection, θ = 60°

time of motion, t = 5s

the vertical component of the velocity, $u_y= u\ sin \theta = 60sin(60^0)$

The magnitude of the displacement after 5s is calculated as;

$h = u_yt -\frac{1}{2} gt^2\\\\h = 60sin (60^0)\times 5 - \frac{1}{2} (9.8)(5)^2\\\\h = 259.81-122.5\\\\h = 137.31 \ m$

Therefore, the magnitude of the displacement after 5s is 137.31 m.

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3 years ago

A 5.0 A current is set up in a circuit for 6.0 min by a rechargeable battery with a 6.0 V emf. By how much is the chemical energ

Andre45 [30]

Answer:

The chemical energy of the battery was reduced in 10800J

Explanation:

The first thing to take into account is that the stored energy in a battery is in Watts per second or Joules ( $W\cdot s=J$ ). It means that the battery provides a power for a certain time.

The idea is to know how much $W\cdot s$ has been consumed by the circuit.

The first step is to know the power that is consumed by the circuit. It is $P=V\cdot I$ . The problem says that the circuit consumes a current of 5.0A with a voltage of 6.0V. It means that the power consumed is:

$P=V\cdot I=(6.0V)\cdot (5.0A)=30W$

The previous value (30W) is the power that the circuit consumes.

Now, you must find the total amount of power that is consumed by the circuit in 6.0 minutes. You just have to multiply the power that the circuit consumed by the time it worked, it means, 6.0 minutes.

$energy=P\cdot t=(30W)\cdot (6.0min)=180W\cdot min$

You must convert the minutes unit to seconds. Remember that 1 minute has 60 seconds.

$energy=P\cdot t=(30W)\cdot (6.0min) \cdot \frac{60s}{1min}=10800W\cdot s=10800J$

Thus, the chemical energy of the battery was reduced in 10800J

8 0

4 years ago

The acceleration of gravity on Earth is approximately 10 m/s2 (more precisely, 9.8 m/s2). If you drop a rock from a tall buildin

mars1129 [50]

Answer:

30 m/s

Explanation:

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4 years ago

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VMariaS [17]

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3 years ago

Read 2 more answers

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Vesnalui [34]

Your answer is c holding a brick doesn't contain movement, but energy to grip on it.

hoped it helped!!!

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4 years ago