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
Arturiano [62]
3 years ago
7

3. A ball thrown vertically upward returns to its starting point in 4s. Find its initial speed. [4]

Physics
1 answer:
Alinara [238K]3 years ago
6 0

Answer:

9.8 ×4 equal 39.2 m/s This is v intial

You might be interested in
A vacuum tube can be used to__. A. change alternating current into direct current B. increase the strength of a signal.. C. turn
vesna_86 [32]

The correct answer of this question is :  A) Change alternating current into direct current.

EXPLANATION :

As per the question, we are given vacuum tube. Vacuum tube can be of various types. Normally it contains two electrodes called cathode and anode which are enclosed in an evacuated glass chamber . There are also other types of vacuum tubes which contain extra electrodes like control grid .

The vacuum tube can be used as a rectifier. It means that it can be used as an electronic device which will convert alternating current into direct current. It may be a half wave rectifier or a full wave rectifier. Actually the direct current obtained during the rectification of alternating current is pulsating in nature.

Hence, the correct answer is that a vacuum tube can be used to change alternating current into direct current.


4 0
3 years ago
Read 2 more answers
The elements from this section of the periodic table all belong to the same
Lady_Fox [76]

Answer:

The answer is:

B) period

3 0
3 years ago
Which best describes the way a sound wave is sent trough the radio?
horsena [70]
Sound wave > electric signal > radio wave > sound wave
4 0
3 years ago
Read 2 more answers
What name is used for scientists who study the weather in an area over a long time, such as 200 years? Hydrologists weather repo
andrew11 [14]

Answer:

I think it is meteorologist because they also study of the atmosphere, atmospheric phenomena, and atmospheric effects on our weather.

4 0
3 years ago
In free fall, the ___________ of velocity of the object changes
aleksley [76]

Answer:

Magnitude and direction.

Explanation:

Velocity can be defined as the rate of change in displacement (distance) with time. Velocity is a vector quantity and as such it has both magnitude and direction.

Mathematically, velocity is given by the equation;

Velocity = \frac{distance}{time}

Gravity is considered to be a universal force of attraction which acts between all objects that has both mass, energy and occupy space. Therefore, it acts in such a way as to bring objects together.

Additionally, the gravity of earth makes it possible for all physical objects to possess weight.

Hence, in free fall, the magnitude and direction of velocity of the object changes.

5 0
3 years ago
Other questions:
  • A father uses a rope to pull a child on a sled at a constant speed. of the ones listed which forces are present?
    6·1 answer
  • a layer of sandstone is in contact with a mass of granite. the sandstone contains small fragments of the granite. which rock is
    7·1 answer
  • Nuclear Energy definition ​
    8·1 answer
  • Suppose a thin conducting wire connects two conducting spheres. A negatively charged rod is brought near one of the spheres, the
    14·1 answer
  • Multiply the number 4.48E-8 by 5.2E-4 using Google. What is the correct answer in scientific notation?
    8·1 answer
  • A batter hits a foul ball. The 0.14-kg baseball that was approaching him at 40 m/s leaves the bat at 30 m/s in a direction perpe
    15·2 answers
  • Forces acting on a ball as it is being squeezed
    10·1 answer
  • ______ Is the distance and direction of an object's change in position from its starting point.
    12·2 answers
  • The efficiency of a light source is the percentage of its energy input that gets radiated as visible light. if some of the blue
    12·1 answer
  • When a beam of charged particles moves through a magnetic field, what is the evidence that particles in the beam have momentum g
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!