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3 years ago

How is the direction of a vector affected when it is multiplied by a scalar?

1 answer:

6 0

The direction of a vector multiplied by a scalar is only affected if the scalar is negative, in which case the vector will now be in the opposite direction. If the scalar is positive, the vector will only change in magnitude

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A 58-kg boy swings a baseball bat, which causes a 0.140-kg baseball to move towards 3rd base with a velocity of 38.0 m/s. What i

Anestetic [448]

ANSWER:

101.08 joules.

STEP-BY-STEP EXPLANATION:

Given:

m = 0.140 kg

v = 38.0 m/s

Kinetic energy can be calculated using the following formula:

$E=\frac{1}{2}\cdot m\cdot v^2$

Replacing

$\begin{gathered} E=\frac{1}{2}\cdot0.140\cdot(38.0)^2 \\ E=101.08\text{ J} \end{gathered}$

The kinetic energy of baseball is 101.08 joules.

4 0

2 years ago

The potential difference between the terminal of an electrical heater is 60v when it draw a current 4A fron the source. What cur

insens350 [35]

The current through the heater is 8 A if potential difference is increased to 120 V.

Explanation:

According to Ohm's Law, the potential difference (Voltage) is directly proportional to the current flowing through a conductor.

That is, V ∝ I

⇒ V = IR where R is the constant of proportionality called resistance.

In this case, given voltage = 60 V and current = 4 A. To find the current, first find the constant of proportionality, resistance of the heater.

R = V/I = 60/4 = 15 ohm

If the potential difference is increased to 120 V, find the current flowing through it.

I = V/R = 120/15 = 8 A

6 0

3 years ago

What type of energy is biomass energy? <br><br> A) kinetic energy <br> B) potential energy

Leona [35]

Answer:

Biomass energy is a form of energy that is gotten from organic materials

6 0

3 years ago

Which symbol and unit of measurement are used for electric current?

Burka [1]

Answer: Symbol is I and unit A

Explanation: A represents Amperes

HOPE THIS HELPS!!!!!!!!

4 0

3 years ago

Noah stands 170 meters away from a steep canyon wall. He shouts and hears the echo of his voice one second later. What is the sp

xxMikexx [17]

answer: 340 m/s

explanation: in this instance, the sound wave travels 340 meters in 1 second, so the speed of the wave is 340 m/s. remember, when there is a reflection, the wave doubles its distance. in other words, the distance traveled by the sound wave in 1 second is equivalent to the 170 meters down to the canyon wall plus the 170 meters back from the canyon wall.

7 0

4 years ago