When a firecracker explodes, what types of energy does it give off?a. sound and light energy only
b. potential and kinetic energy
c. sound, light, and heat energy
d. sound, light, and chemical energy

Answers

Answer 1

Answer: The answer is c.
Sound, light and heat energy.

Hope this helped :)

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How far does light travel in 1 millisecond that is, in one hundredth of a scecond?

Answers

First of all, we have to convert the time into seconds:
$t=1 ms=0.001 s$
Light travels at speed of $v=3\cdot 10^8 m/s$ .
The distance covered by the light during this time can be found with the formula
$v= (S)/(t)$
where S is the distance covered and t the time. By re-arranging this formula and by plugging the numbers into it, we find how far the light went in 1 millisecond:
$S=vt=(3\cdot 10^8)(0.001 s)=3 \cdot 10^5 m.$

Final answer:

The speed of light is approximately 299,792 kilometers (186,282 miles) per second. Given a millisecond is a thousandth of a second, light will travel approximately 299.792 kilometers in one millisecond.

Explanation:

The speed of light in a vacuum, such as outer space, is a set constant in physics, approximately 299,792 kilometers per second, or about 186,282 miles per second. Thus, if we want to know how far light travels in 1 millisecond, that is, one hundredth of a scecond, we need to convert seconds into milliseconds.

There are 1,000 milliseconds in one second. Hence, in 1 millisecond, light will travel about 299.792 kilometers (or about 186.282 miles).

Learn more about Speed of Light here:

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A quantity of a gas is an absolute pressure of 400 K PA in the absolute temperature of 110° Kelvin when the temperature of the gas is raised to 235° Kelvin what's the new pressure of the gas?

Answers

Given:

P1 = 400 kPa
T1 = 110 K

T2 = 235K

Required:

Solution:

Apply Gay-Lussac’s law where P/T = constant

P1/T1 = P2/T2

P2 = T2P1/T1

P2 = (235K)(400kPa) / (110K)

P2 = 855 kPa

What happens to ocean water as it moves from Antarctica to the equator

Answers

As they move water, ocean currents distribute heat and nutrients around the globe.

Which type of environment results from an equal amount of solute and solvent in and out of the cell?A. hypertonic environment
B. isotonic environment
C. hypotonic environment
D. flaccid

A molecule that moves across a cell membrane without using the cell's energy tends to move
A. away from the area of equilibrium.
B. away from the area where it is less concentrated.
C. away from the area where it is more concentrated.
D. toward the area where it is more concentrated.

Answers

Answer: The correct answer for first question is- B) Isotonic enviroment.

Isotonic environment is created in and outside a cell when the concentration of solute ( like salt) and solvent ( like water) are same on both the sides ( that is inside and outside the cell).

In other words, it represents the same osmolarity.

The correct answer for second question is- C) Away from the area where it is more concentrated.

When a molecule moves across a cell membrane without using energy, it represents passive transport. In this transport, molecules move from an area where their concentration is high to an area of lower concenteration.

Thus, option C) is the right answer.

The answer to the first question is C isotonic environment. To help me learn this I memorized that isotonic is equal hypotonic is over hydrated while hypertonic is dehydrated. And for the second question is they move from high to low so C

What is the relationship among amplitude,crest,and trough?

Answers

These are characteristics of a wave. The amplitude is how high and low the waves go. Crests are high points on the wave, and troughs are low points on the wave.

Contrast generators and electric motors.

Answers

Answer:

A generator produces electricity when a conducting wire is rotated between magnetic field. Mechanical energy is converted to electrical energy. Fleming's right hand rule is used.

An electric motor does mechanical work using electrical energy. A current carrying coil is placed in magnetic field. A torque is exerted on the coil and it rotates. Electrical energy is converted to mechanical energy. Fleming's left hand rule is used.

generators take mechanical and output energy. electric motors take the input of electricity.

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At t = 0, one toy car is set rolling on a straight track with initial position 13.5 cm, initial velocity -4.2 cm/s, and constant acceleration 2.60 cm/s2. At the same moment, another toy car is set rolling on an adjacent track with initial position 8.5 cm, initial velocity 5.20 cm/s, and constant zero acceleration.(a) At what time, if any, do the two cars have equal speeds? (b) What are their speeds at that time? (c) At what time(s), if any, do the cars pass each other? ...?

When a wire is made smaller, the resistance increases. Which happens to the electric current?

A proton moves along the x axis according to the equation x = 38 t + 14 t2, where x is in meters and t is in seconds. Calculate (a) the average velocity of the proton during the first 3.0 s of its motion, (b) the instantaneous velocity of the proton at t = 3.0 s, and (c) the instantaneous acceleration of the proton at t = 3.0 s.