To test the quality of a tennis ball, you drop it onto a floor from a height of 4.00m . It rebounds to a height of 2.00 m. If the ball is in contact with the floor for 12.0ms,(a) What is the magnitude of its average acceleration during the contact?
(b) is the acceleration up or down?

Answers

Answer 1

Answer: A. dont know
B. Up not down

Related Questions

Which one of the following types of electromagnetic radiation causes certain substances to fluoresce? A. Cosmic raysB. Ultraviolet rays(C. X rays)D. Infrared wavesA virtual image produced by a lens is always A. located in front of the lens.(B. located in the back of the lens.)C. smaller than the object.D. larger than the object.Reflecting telescopes are popular because they're A. more durable than a refracting telescope.B. more powerful than a refracting telescope.C. easier to build than a refracting telescope.(D. smaller than a refracting telescope.)The unit for measuring the rate at which light energy is radiated from a source is the A. lux.B. lumen.(C. candela.)D. AngstromA magnifying glass is an example of a _______ lens. A. plano-concave(B. plano-convex)C. double-concaveD. convergingmy answer is in ( ) and the answers are wrong please tell me the correct answer because i dont have a clue
"Light travels at the rate of 300,000 kilometers per second in a vacuum." Which of these statements is correct about this law? a. It is a fact in nature which cannot be tested. b. It is a theory which is not supported by data. c. It is an observation which cannot be explained. d. It is a description which does not work under similar conditions.
During a _____ change a system absorbs energy from its surroundings
a bullet of mass 40 gm is fired from a gun of mass 8 kg with a velocity of 800 m/s, calculate the recoil velocity of gu
What type of medium makes sound travel the fastest and Explain WHY.

Organisms that live in desert and desert-scrub biomes have developed unique adaptations that aid in their survival. The Sahara Desert takes up ten percent of the continent of Africa, and is the largest desert in the world. The species that live in the Sahara are highly adapted to survive in the extreme conditions they live in. What morphological and physiological adaptations might be seen in the organisms that live in the Sahara Desert?

Answers

Some morphological and physiological adaptations of organisms includes special storage organs of geophytes and other plants, deep root systems of trees in order to reach deep aquifers. Additionally, some plants survive by germinating quickly after the rains and before the summer heat these plants complete their life cycles.

Answer:

C. small bodies and long limbs in warm-blooded organisms, light colored fur or feathers to reflect sunlight, lack of sweat glands in many organisms, hibernation during hot months

Explanation:

What are the 3 types of mediums that sound can travel through

Answers

solid,liquid, gas is the answer hope it helps enjoyyyyy
!!!!!!!!!!!!!!!

Distance measurements based on the speed of light; used for objects in space

Answers

Answer : Yes, distance measurements based on the speed of light used for objects in space.

Explanation : A light year is measurement of distance that light travel in a one year.

In a one year light travels 9460000000000 kilometer.

We know that, speed of light is $3*10^(8)\ m/s$

and time is 31536000 seconds in 1 year

so, distance= speed of light X time

Now, the light year is $9.4608*10^(15) meter$

Example : The nearest star to earth is about 4.3 light year away.

If you want to study how energetic waves affect matter, you should study waves with a _______.

Answers

lower frequency ad shorter wave length is my best guess honestly other wise i suck

I feel like it is Higher frequency and Shorter wavelength...I could be wrong though.

The momentum of a bald eagle in flight is calculated to be 345. The mass of the eagle is 5.0 kg. What is the magnitude of the velocity of the eagle?

Answers

p=mv
345=5v
v=345/5=69m/s

What is the resistance of an ideal ammeter voltmeter ?

Answers

All the current being measured has to flow through the ammeter. So in order to avoid
any change in the circuit caused by the ammeter, its resistance should ideally be zero.

The voltmeter measures the voltage between two points. It must be connected
between those points, and in parallel with everything between them in the circuit.
In order to avoid any change in the circuit caused by the voltmeter, its resistance
should ideally be infinite.

Final answer:

An ideal ammeter has zero resistance to avoid altering the current it measures, while an ideal voltmeter has infinite resistance to prevent drawing current from the device it's measuring the voltage of.

Explanation:

The resistance of an ideal ammeter is zero ohms. This ensures that it doesn't interfere with the current it is measuring. An ammeter is connected in series with the circuit, and if the resistance were greater than zero, it would decrease the amount of current circulating in the circuit.

On the other hand, an ideal voltmeter has infinite resistance. This happens because a voltmeter is connected in parallel with a device to measure its voltage, and to avoid drawing current from the device, an ideal voltmeter should have infinite resistance.