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4 years ago

1. A wave can be described as (2 points)

Physics

1 answer:

laila [671]4 years ago

6 0

Answer:

Well,

Explanation:

In a wave, energy is transported without the transport of water. Basically, a wave can be described as a disturbance that travels through a medium, transporting energy from one location to another location without transporting matter.

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To increase the brightness of a desk lamp, a student replaces a 50-watt incandescent lightbulb with a 100-watt incandescent ligh

swat32

From the formula for Electric Power, P = IV, P = V²/R

So the 100W compared to the 50W.

From P = IV. From the equation there is a direct relationship between P and I. More Power P means more Current, I.

From P = V²/R. From the equation, there is an inverse relationship
between P and R. Therefore more P means less R.

So from these assertions, the answer is:

(1) less resistance and draws more current

3 0

3 years ago

Kinematics practice problems Answers: 4. A race car is traveling at +76 m/s when is slows down at -9 m/s2 for 4

arlik [135]

The new velocity after 4 s is 40 m/s

The height of the spaceship above the ground after 5 seconds is 1,127.5 m

The given parameters for the first question;

initial velocity of the car, u = 76 m/s

acceleration of the car, a = - 9 m/s²

time of motion, t = 4 s

The new velocity after 4 s is calculated as;

v = u + at

v = 76 + (-9)(4)

v = 76 - 36

v = 40 m/s

(5)

The given parameters;

height above the ground, h = 500 m

velocity of spaceship, u = 150 m/s

time of motion, t = 5

The height of the spaceship above the ground after 5 seconds is calculated as;

$h_y = h_0 + ut - \frac{1}{2}gt^2\\\\h_y = 500 + (150\times 5) - (0.5\times 9.8 \times 5^2)\\\\h_y = 1,127.5 \ m$

Learn more here: brainly.com/question/24527971

5 0

3 years ago

Question 25

Aleks04 [339]

The answer would be B

7 0

3 years ago

Why is acid always added to water and not the reverse?

vladimir2022 [97]

Answer:

A lot of warmth is discharged when solid acids are blended in with water. Including increasingly corrosive discharges more warmth. On the off chance that you add water to corrosive, you structure an incredibly thought arrangement of corrosive at first. So much warmth is discharged that the arrangement may bubble viciously, sprinkling concentrated corrosive out of the compartment! In the event that you add corrosive to water, the arrangement that structures is weaken and the limited quantity of warmth discharged isn't sufficient to disintegrate and splash it. So Always Add Acid to water, and never the switch.

6 0

4 years ago

What is the change in internal energy (in J) of a system that releases 954 J of thermal energy to its surroundings and has 166 c

Harman [31]

Answer:

259.456 J

Explanation:

Given that,

Work done on the system = 166 cal

The systam releases 954 J of thermal energy to its surroundings

We need to find the change in internal energy. It can be given by using the first law of thermodynamics as follows :

$\Delta U=Q-W$

W = 166 cal = 694.544 (1cal = 4.184 J)

$\Delta U=954-694.544\\\\=259.456\ J$

So, the change in internal energy of the system is 259.456 J.

4 0

3 years ago