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
Talja [164]
3 years ago
11

Question 7 Unsaved Brycen can cover half a basketball court (about 14 meters) in 4.0 seconds flat! How fast can he run? Question

7 options:
18 m/s


10 m/s


3.5 m/s


0.28 m/s
Physics
1 answer:
lana66690 [7]3 years ago
7 0

D = distance traveled = 14 m

t = time taken = 4 sec

v = speed of Brycen

the formula that relates speed, time and distance is given as

speed = distance/time

speed of Brycen is given as

v = D/t

inserting the values

v = 14/4

v = 3.5 m/s

You might be interested in
Which of the following scientists taught physics in the United States?
Sergio039 [100]
<span>Subrahmanyan Chandrasekhar

</span>
6 0
3 years ago
Read 2 more answers
When you break a magnet in half how many poles does each piece have.
Anastaziya [24]
It will have two poles
7 0
3 years ago
Along some shorelines, incoming waves cause the water to simply rise and fall rather that form a surf zone. What does this tell
NARA [144]

Answer:

Explained

Explanation:

Along some shorelines, incoming waves cause the water to simply rise and fall and not form surfs because of the steepness of the shorelines. Long period waves wont form surfs at steep shores because of the breaking and unstability of waves. Wave breaks at the shallow waters. The breaking of the waves depends upon H/L ratio.

5 0
3 years ago
Add the following displacement vectors: <br> 12 m south and 15 m 55° E of N??
daser333 [38]
12m S=0m E, -12m N
15m 55d E of N = 15 sin 55, 15 cos 55 N
Sum= (15sin55)m E, (-12 + 15 cos 55)m N
4 0
3 years ago
A coil has 400 turns and self-inductance 7.50 mH. The current in the coil varies with time according to i = 1680 mA2 cos [πt/(0.
zhannawk [14.2K]

Answer:

(a) 1.58 V

(b) 0.0126 Wb

(c) 0.0493 V

Solution:

As per the question:

No. of turns in the coil, N = 400 turns

Self Inductance of the coil, L = 7.50 mH = 7.50\times 10^{- 3}\ H

Current in the coil, i = 1680cos[\frac{\pi t}{0.0250}] A

where

i_{max} = 1680\ mA = 1.680\ A

Now,

(a)  To calculate the maximum emf:

We know that maximum emf induced in the coil is given by:

e = \frac{Ldi}{dt}

e = L\frac{d}{dt}(1680)cos[\frac{\pi t}{0.0250}]

e = - 7.50\times 10^{- 3}\times \frac{\pi}{0.0250}\times \frac{d}{dt}(1680)sin[\frac{\pi t}{0.0250}]

For maximum emf, sin\theta should be maximum, i.e., 1

Now, the magnitude of the maximum emf is given by:

|e| = 7.50\times 10^{- 3}\times 1680\times 10^{- 3}\times \frac{\pi}{0.0250} = 1.58\ V

(b) To calculate the maximum average flux,we know that:

\phi_{m, avg} = L\times i_{max} = 7.50\times 10^{- 3}\times 1.680 = 0.0126\ Wb

(c) To calculate the magnitude of the induced emf at t = 0.0180 s:

e = e_{o}sin{\pi t}{0.0250}

e = 7.50\times 10^{- 3}\times sin{\pi \times 0.0180}{0.0250} = 2.96\times 10^{- 4} =0.0493\ V

7 0
3 years ago
Other questions:
  • A car goes from point A to point B, five miles away and then returns to point A. The car is going 15 mph.
    6·1 answer
  • The internal energy of a system....
    12·1 answer
  • You are playing catch with a friend in a moving train. When you toss the ball in the direction the train is moving, how does the
    5·1 answer
  • Life cycle of a medium mass star
    7·1 answer
  • The sun is the centermost star of our solar system. <br> a. True <br> b. False
    11·2 answers
  • When a physical or chemical change occurs, the law of conservation of mass always applies. What happens to the atoms during a ch
    7·2 answers
  • The frequency of a simple pendulum that makes 120 complete oscillations in 3 minutes is:
    12·1 answer
  • Nodes give a vertebrate’s back flexibility.<br> A. True<br> B. False
    7·2 answers
  • DC current is flowing in the primary coil of a transformer. Which of the following DOES NOT happen? A. There is a magnetic field
    11·2 answers
  • An instrument used to detect the current in a<br> circuit is called
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!