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
suter [353]
3 years ago
14

Samuel tripped while playing basketball and skinned his knee on the concrete. Many of the skin cells on that knee were killed or

removed entirely, leaving his knee open and unprotected. Eventually, his knee scabbed over, and when the scabs fell off, there was new skin underneath. Where did the new skin come from? A. Extra skin cells from other parts of Samuel's body were moved to the injury. B. Existing skin cells near the injury reproduced to make new cells. C. Skin cells near the injury increased in size to cover the injury. D. Existing cells near the injury changed into skin cells to cover the injury.
Physics
1 answer:
kvv77 [185]3 years ago
3 0
The answer is B. Old cells need to create new cells to replenish the ones that were lost.
You might be interested in
A major physical disability usually leaves people ________ than able-bodied people with depression. Most patients "locked in" a
Ierofanga [76]

Answer:

happier; do not

Explanation:

A major physical disability usually leaves people __happier______ than able-bodied people with depression. Most patients "locked-in" a motionless body ____do not____ indicate they want to die.

4 0
3 years ago
Read 2 more answers
a car headed north at 15 m/s accelerates for 4.25 s to reach a velocity of 28.3 m/s. What is the acceleration of the car?
Liono4ka [1.6K]

<u>Answer:</u>

The acceleration of the car is 3.13 m/s^2

<u>Explanation:</u>

In the question it is given that car initially heads north with a velocity 15 m/s. It then accelerates for 4.25 s and in the end its velocity is 28.3 m/s.

initial velocity u = 15 m/s

time t=4.25 s

final velocity v=28.3 m/s

The equation of acceleration is

a= \frac{(v-u)}{t}

= \frac{(28.3-15)}{4.25} =  \frac {13.3}{4.25} =3.13m/s^2

The value of acceleration is positive, here since the car is speeding up. If it was slowing down the value of acceleration would be negative.

7 0
3 years ago
What is the sum of 231 + 5080 + 80 + 13 + 9​
Gemiola [76]

Answer:

5413

Explanation:

add them up

6 0
3 years ago
What is the force on an electron in a CRT when it’s moving at 2.5 × 105 meters/second perpendicular to a magnetic field of 1.5 t
Firdavs [7]
F = Magnetic Force
B = Magnetic Field
V = Velocity

*The vectors from the photo you get doing the left-hand rule.

The magnetic force is always perpendicular to the magnetic field.

And as told in the statement, the electron is moving perpendicular to a magnetic field, that is, the Velocity forms an 90 degree angle / Right angle with the magnetic field.

The formula to find the Magnetic Force is:

f = |q| \times v \times b \times sin \: \theta

Where "q" is the Charge and the sin theta is the angle formed by the Velocity and Magnetic Field, in this case it's 90°. Sin 90° = 1.

f = |- 1.6 \times {10}^{ - 19} | \times 2.5 \times {10}^{5} \times 1.5 \times 1 \\ f = 6 \times {10}^{ - 19 + 5} \\ f = 6 \times {10}^{ - 14} \: newtons
Newton (N) = C x m/s x T = (C x m x T)/s

4 0
3 years ago
In longitudinal waves the places where the coils are bunched together are called *
Firdavs [7]
In longitudinal waves the places where the coils are bunched together are called *
Compressions
3 0
3 years ago
Other questions:
  • Cotton has a higher tendency to attract electrons than human skin. When Kevin pulls his cotton shirt off his body, the electrons
    11·2 answers
  • True or False: The average speed of an object is always equal to the magnitude of the average velocity of the object. If False,
    7·1 answer
  • Why are all galaxies moving away from us?
    14·1 answer
  • An object with 274 J of GPE is 140cm above the ground. What is its mass?
    12·1 answer
  • Which of the following is a good insulator? Wire, doorknob, plastic, nickle
    6·2 answers
  • The magnetic flux that passes through one turn of a 26-turn coil of wire changes to 4.5 Wb from 12.0 Wb in a time of 0.034 s. Th
    7·1 answer
  • Define limitations in the operation conditions of a pn junction<br>​
    7·1 answer
  • A force that opposes motion in moving parts is friction. <br><br> A. true<br> b false
    6·2 answers
  • How is mechanical advantage determined in a pulley system?
    13·1 answer
  • good morning to you all! can someone please answer this, ill give you brainliest and your earning 50 points.
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!