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
ASHA 777 [7]
2 years ago
6

What is that distance traveled by an arrow going 78 m/s for 5 seconds

Physics
1 answer:
pshichka [43]2 years ago
8 0

Explanation:

velocity=distance/time

distance= velocity×time

distance= 78×5=390m

You might be interested in
When considering the gas laws, the kelvin temperature scale must be used. the reason for this is that the kelvin scale is direct
suter [353]
.;;jmbbbvvb nhjmhnjhmnhjmgmjhyg   gt vfdxg fbrdhtggdfse
7 0
3 years ago
Calculate curls of the following vector functions (a) AG) 4x3 - 2x2-yy + xz2 2
aleksandr82 [10.1K]

Answer:

The curl is 0 \hat x -z^2 \hat y -4xy \hat z

Explanation:

Given the vector function

\vec A (\vec r) =4x^3 \hat{x}-2x^2y \hat y+xz^2 \hat z

We can calculate the curl using the definition

\nabla \times \vec A (\vec r ) = \left|\begin{array}{ccc}\hat x&\hat y&\hat z\\\partial/\partial x&\partial/\partial y&\partial/\partial z\\A_x&X_y&A_z\end{array}\right|

Thus for the exercise we will have

\nabla \times \vec A (\vec r ) = \left|\begin{array}{ccc}\hat x&\hat y&\hat z\\\partial/\partial x&\partial/\partial y&\partial/\partial z\\4x^3&-2x^2y&xz^2\end{array}\right|

So we will get

\nabla  \times \vec A (\vec r )= \left( \cfrac{\partial}{\partial y}(xz^2)-\cfrac{\partial}{\partial z}(-2x^2y)\right) \hat x - \left(\cfrac{\partial}{\partial x}(xz^2)-\cfrac{\partial}{\partial z}(4x^3) \right) \hat y + \left(\cfrac{\partial}{\partial x}(-2x^2y)-\cfrac{\partial}{\partial y}(4x^3) \right) \hat z

Working with the partial derivatives we get the curl

\nabla  \times \vec A (\vec r )=0 \hat x -z^2 \hat y -4xy \hat z

6 0
3 years ago
A car moves with a speed 72km/h, the driver uses the brakes, the car stops after 8 seconds, calculate its speed after 10 seconds
vampirchik [111]
The acceleration of the car is solved by subtracting the initial speed from the final speed then dividing the result by the elapsed time.

initial speed = 72 km/hr = 20 m/s

final speed = 0 m/s

elapsed time = 5 seconds

acceleration = (0 m/s – 20 m/s) / 5 s

acceleration = - 20m/s / 5 s

acceleration = -4 m/s^2
8 0
3 years ago
When a river flows into an ocean, it slows down and deposits materials in its alluvial fan/delta
nikklg [1K]
When a river flows into an ocean, it slows down and deposits materials in its delta
8 0
3 years ago
An AC adapter for a telephone answering machine uses a transformer to reduce the line voltage of 120 V to a voltage of 5.00 V. T
Maksim231197 [3]

Answer:

35

Explanation:

We are given that

Initial voltage,V_1=120 V

Final voltage, V_2=5 V

Number of tuns in primary coil of the transformer, N_p=840

Rms current, I_{rms}=580mA=580\times 10^{-3} A

1 mA=10^{-3} A

We have to find the number of turns  are there on the secondary coil.

We know that

\frac{N_s}{N_p}=\frac{V_2}{V_1}

Using the formula

\frac{N_s}{840}=\frac{5}{120}

N_s=\frac{5}{120}\times 840=35

Hence, there are  number of turns on the secondary coil=35

8 0
3 years ago
Other questions:
  • A team of engineering students is testing their newly designed 200 kg raft in the pool where the diving team practices. The raft
    11·1 answer
  • Which term describes when situations, events, or people make demands on your body and mind
    15·2 answers
  • A wave with a greater amplitude will transfer . . . . \
    9·1 answer
  • Explain how potential difference produces a current in a conductor.
    10·1 answer
  • A(n)... is a material that takes in a wave when the wave hits it
    8·1 answer
  • The magnitude of the magnetic force on a current-carrying wire held in a magnetic
    14·1 answer
  • Consider a roller coaster begins 15m above the ground. If the cart has a mass of 75kg, what is the velocity of the cart halfway
    10·1 answer
  • Choose the correct association for: dense bushes<br><br> savanna<br> rain forest or jungle
    10·1 answer
  • a tuck at rest starts to move and accelerated by 4m/s in 25 secondd. what is the velocity of the truck at the end offf the time?
    15·2 answers
  • A bullet fired into a fixed target loses half of its velocity after penetrating 3 cm. How much further it will penetrate before
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!