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3 years ago

Do blood cells have a rigid cell wall

1 answer:

5 0

Human cells don't have a cell wall in the same way that plants do. We have cell membranes which are more malleable structures than the rigid cell walls of plants.

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A car drives in a circle at 56 km/hr. Which of

hoa [83]

Answer:

Speed is constant but velocity is changing

Explanation:

Speed is a scalar quantity, meaning magnitude only. Velocity is a vector quantity, meaning magnitude and direction. If you're moving in a circle at a constant speed, the speed is constant but the direction is constantly changing. Therefore, the speed is constant but velocity changes.

5 0

3 years ago

Which of the following would add more resistance? Check all that apply.

Blababa [14]

Answer:C. E.

Explanation:

4 0

3 years ago

Gold has a density of 19.3 grams per cubic centimeter. what is the density of gold in metric tons per cubic meter?

valina [46]

In order to determine this, we will first need some conversions. We will need to convert metric tons and grams into one another and also cubic centimeters to cubic meters into one another.

1 metric ton = 1000 kg

1 kg = 1000 grams

1 metric ton = 10⁶ grams

So 10⁶ grams / metric ton

1 meter = 100 cm
1 m³ = (100)³ cm³
1 m³ = 10⁶ cm³

So 10⁶ cm⁶ / m³

Now, we manipulate the given value:

(19.3 grams / cm³) * (1 metric ton / 10⁶ grams) * (10⁶ cm³ / m³)
= 19.3 metric tons / m³

The density of gold is 19.3 metric tons meter meter cubed.

6 0

3 years ago

Uncertainty in 21.0 C is A. 0.1 B. 0.2 C. 0.05

san4es73 [151]

it's A.0.1

that's the answer

4 0

2 years ago

Carry's car has a mass of 1000 kg and its brakes can apply 8000 N of force. If she is driving at 24 m/s and sees something in th

-Dominant- [34]

Explanation:

Given parameters:

Mass of car = 1000kg

Force applied = 8000N

speed = 24m/s

Unknown:

time taken for the car to stop = ?

Solution:

According to newton's second law of motion; "the force on a body is the product of its mass and acceleration".

Force = mass x acceleration

let us find the acceleration of the car;

a = $\frac{F}{M}$ = $\frac{8000}{1000}$ = 8m/s²

since the car is accelerating at a rate of 8m/s², when the brakes are applied, it will start decelerating at the constant rate, - 8m/s²

Applying the appropriate equation of motion;

V = U + at

V is the final velocity

U is the initial velocity

a is the acceleration

t is the time taken

final velocity = 0

0 = U + at

-U = at

-24 = -8t

t = 3s

learn more:

Newton's laws brainly.com/question/11411375

#learnwithBrainly

8 0

4 years ago