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
Phoenix [80]
3 years ago
14

A volleyball is served at a speed of 8 / at an angle 35° above the horizontal. What is the speed of the ball when received by th

e opponent at the same height?
Physics
1 answer:
bezimeni [28]3 years ago
7 0
The speed of the ball is how hard u hit it
You might be interested in
A wire of length 6cm makes an angle of 20° with a 3 mT
Crazy boy [7]

Answer:

Approximately 7.3 \times 10^{-3}\; \rm A (approximately 7.3\; \rm mA) assuming that the magnetic field and the wire are both horizontal.

Explanation:

Let \theta denote the angle between the wire and the magnetic field.

Let B denote the magnitude of the magnetic field.

Let l denote the length of the wire.

Let I denote the current in this wire.

The magnetic force on the wire would be:

F = B \cdot l \cdot I \cdot \sin(\theta).

Because of the \sin(\theta) term, the magnetic force on the wire is maximized when the wire is perpendicular to the magnetic field (such that the angle between them is 90^\circ.)

In this question:

  • \theta = 20^\circ (or, equivalently, (\pi / 9) radians, if the calculator is in radian mode.)
  • B = 3\; \rm mT = 3 \times 10^{-3}\; \rm T.
  • l = 6\; \rm cm = 6 \times 10^{-2}\;\rm m.
  • F = 1.5\times 10^{-4}\; \rm N.

Rearrange the equation F = l \cdot I \cdot \sin(\theta) to find an expression for I, the current in this wire.

\begin{aligned} I &= \frac{F}{l \cdot \sin(\theta)} \\ &= \frac{3\times 10^{-3}\; \rm T}{6 \times 10^{-2}\; \rm m \times \sin \left(20^{\circ}\right)} \\ &\approx 7.3 \times 10^{-3}\; \rm A = 7.3 \; \rm mA\end{aligned}.

5 0
3 years ago
A wave is sent down a 10 meter long string. The wave has an amplitude of 25 centimeters. It travels the 10 meters in 4 seconds.
cluponka [151]
Bsjsnwkamdnsiwndjakenfjskqmdbdjakemfjslwlrnfjwowkrbfjdiwmrnfjs
7 0
3 years ago
List two examples of energy transformation necessary for the sporting event to take place
Morgarella [4.7K]

Electrical to light & electrical to sound (in commentry) & sometimes battery loudspeakers are used so chemical to sound
5 0
4 years ago
Which statement(s) correctly compare the masses of protons, neutrons, and electrons?
ZanzabumX [31]
FULL ANSWER

Neutrons and protons make up a nucleus and they are in the middle of an atom. Electrons surround the nucleus. Opposite charges attract each other. Because of this, protons do not attract other protons and electrons do not attract other electrons. Instead, protons attract electrons and electrons attract protons. When someone looks at the elements on the periodic table, they can see how many protons are present by looking at the atomic number. Since atoms have to have an equal amount of each, if an element contains 36 protons, it also has 36 electrons.

6 0
3 years ago
PLEASE HELP. I'LL GIVE BRAINLIEST IF YOU GET IT RIGHT.
neonofarm [45]

Answer:Most of this ancient space rubble can be found orbiting the Sun between Mars and Jupiter within the main asteroid belt. Asteroids range in size from Vesta – the largest at about 329 miles (530 kilometers) in diameter – to bodies that are less than 33 feet (10 meters) across. The total mass of all the asteroids combined is less than that of Earth's Moon.❤

6 0
3 years ago
Other questions:
  • The human head weighs 4.8 kg and its center of mas 1.8 cm in front of the spinal column joint. If the trapezius muscle inserts 1
    6·2 answers
  • you kick a soccer ball straight up into the air with a speed of 21.2 m/s how long does it take the soccer ball to reach its high
    5·1 answer
  • Calculate the breadth B ( in degrees of 2θ ), due to the small crystal effect alone, of the powder pattern lines of particles of
    15·1 answer
  • A runner accelerates to a velocity of 4.15m/s due west in 1.50 s. his average accelerates is 640m/
    5·1 answer
  • Which of the following element has seven total valence electrons? Your answer: argon helium oxygen bromine
    8·1 answer
  • Three blocks of metal at the same temperature are placed on a hot stove. Their specific heat capacities are listed below. Rank t
    6·1 answer
  • Question 7
    13·1 answer
  • How far will a train with a speed of 20 m/s travel in: 10s
    5·1 answer
  • Find the mass of a copper block with heat capacity 50j/kg,(specific heat capacity of copper=400j/kg)​
    10·2 answers
  • _____ Rocks are porous.<br><br> A) Sedimentary<br> B) Metamorphic <br> C) igneous
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!