1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harrizon [31]
3 years ago
11

Calculate the change in velocity of a 0.070kg tennis ball hit by Serena with a force of 140 N over 0.020 s

Physics
1 answer:
Brilliant_brown [7]3 years ago
6 0
V=at and a=F/m

140/.070 = 2000m/s^2

2000*.020 = 40m/s

The ball’s velocity increased by 40m/s.
You might be interested in
Hurricanes are considered____ because they lose power over cool waters or land A. Short-lived B. Heat engines C. Weak
klasskru [66]
My best guess would be heat engines
7 0
3 years ago
Read 2 more answers
Alanna spots a bird in her back yard. The bird is sitting on a tree. Explain how the outer coverings of the bird and tree are di
eduard

Answer:

the outer covering of a bird is usually for camoflauge (idk how to spell) or to attract mates and the outer part of a tree is used for protection i think, correct me if im wrong ;-;

Explanation:

6 0
2 years ago
A 36-cm-circumference loop of wire is placed between the poles of an electromagnet. When a field of 0.76 T is switched on in a t
Marrrta [24]

Answer:

R = 25.3ohms

Explanation:

See attachment below.

5 0
3 years ago
Read 2 more answers
The distance between two consecutive nodesof a standing wave is 20.9cm.Thehandgen-erating the pulses moves up and down throughac
irina1246 [14]

Answer:

Velocity, v = 0.239 m/s

Explanation:

Given that,

The distance between two consecutive nodes of a standing wave is 20.9 cm = 0.209 m

The hand generating the pulses moves up and down through a complete cycle 2.57 times every 4.47 s.

For a standing wave, the distance between two consecutive nodes is equal to half of the wavelength.

\dfrac{\lambda}{2}=0.209\ m\\\\\lambda=0.418\ m

Frequency is number of cycles per unit time.

f=\dfrac{2.57}{4.47}\\\\f=0.574\ Hz

Now we can find the velocity of the wave.

Velocity = frequency × wavelength

v = 0.574 × 0.418

v = 0.239 m/s

So, the velocity of the wave is 0.239 m/s.

4 0
2 years ago
Heat can be transferred through conduction, convection, and radiation. What is necessary in order for heat to be transferred by
jeka94

it would be..... C

sorry if I am wrong I tryed to think, At least I try!

3 0
3 years ago
Read 2 more answers
Other questions:
  • Fish oil in your diet will improve your memory. Independent variable? Dependent variable​
    15·1 answer
  • A simple ideal Brayton cycle uses argon as the working fluid. At the beginning of the compression, P1 = 15 psia and T1 = 70°F, t
    14·1 answer
  • Which of the following statements about lunar phases is true? (A) Only one quarter of the first-quarter moon is illuminated by t
    15·1 answer
  • It is necessary to develop alternative sources of energy because _____.
    11·1 answer
  • Rate of work done against water resistant? Can someone explain why its 3.0W? Thanks.
    11·1 answer
  • Is the threat of or actual use of physical force against oneself or another person.
    12·2 answers
  • If a golf ball is dropped from the thirteenth floor of a building, ignoring air resistance, after falling for 7.00 seconds the s
    13·1 answer
  • Why is lighting visible before thunder is heard
    11·2 answers
  • Please help im down bad
    8·1 answer
  • A pickup truck is carrying a load of gravel. The driver hits a bump and gravel falls out, so that the mass if the truck is one h
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!