All categories

3 years ago

A scientist counts the number of bacteria colonies growing in each of six lab dishes.

Physics

2 answers:

Gnesinka [82]3 years ago

8 0

Answer:

because it appears more than the other numbers

Explanation:

Nadusha1986 [10]3 years ago

5 0

13 is the mode because it is the number that appears most often

You might be interested in

Materials that conduct heat and electricity well in the solid state result when

MA_775_DIABLO [31]

Materials that conduct heat and electricity well in the solid state result when metals bond with metals. This type of bonding is called metallic bonding. Metallic bonding is when positive ions (metals) are in a 'sea of negative electrons'. The electrons are delocalised, which means they can move around easily and carry charge, and this enables it to conduct electricity, even in a solid state.

8 0

4 years ago

White light (light containing all frequencies of light in the visible spectrum) passes through a diffraction grating with 1300 l

lara31 [8.8K]

Answer:

The distance between the 1st order blue fringe and the 1st order red fringe is 6.5 cm.

Explanation:

Given that,

Diffraction grating =1300 lines/cm

Distance of screen = 2 m

Order number = 1

We need to calculate the distance between the 1st order blue fringe and the 1st order red fringe

Using formula of distance

For first order red fringe

$d\sin\theta=m\lambda$

$d\times\dfrac{y}{l}=m\times\lambda$

$y_{r}=\dfrac{m\times\lambda l}{d}$

$y_{r}=\dfrac{1\times700\times10^{-9}\times2}{\dfrac{1}{1300}\times10^{-2}}$

$y_{r}=0.182\ m$

For first order blue fringe

$y_{b}=\dfrac{1\times450\times10^{-9}\times2}{\dfrac{1}{1300}\times10^{-2}}$

$y_{b}=0.117\ m$

We need to calculate the distance between blue fringe and red fringe

$\Delta y=y_{r}-y_{b}$

$\Delta y=0.182-0.117$

$\Delta y=0.065\ m=6.5 cm$

Hence, The distance between the 1st order blue fringe and the 1st order red fringe is 6.5 cm.

7 0

3 years ago

If the plaque buildup (modeled as a cylinder as well) completely blocks the artery, a pressure difference of P between each side

Alona [7]

Answer: Pπr2

Explanation: Force is any interaction that affects an object,that if not opposed or treated will cause some changes in the object. Pressure is directly proportional to force,which means an increase in force will create a corresponding increase in the pressure of a system.

The force on the cloth will be The PRESSURE EXERTED ON THE CLOT (P) *THE PI( which is the RATIO of the circumference of the cylinder i.e3.14159) *the square of the ratio. Which is Pπr2.

3 0

3 years ago

A 11.0 kg satellite has a circular orbit with a period of 1.80 h and a radius of 7.50 × 106 m around a planet of unknown mass. I

Anuta_ua [19.1K]

Answer:

Explanation:

Expression for times period of a satellite can be given as follows

Time period T = 1.8 x 60 x 60

= 6480

T² = $\frac{4\times \pi^2\times r^3}{GM}$ where T is time period , r is radius of orbit , G is gravitational constant and M is mass of the satellite.

6480² = 4 x 3.14² x 7.5³ x 10¹⁸ / GM

GM = 4 x 3.14² x 7.5³ x 10¹⁸ / 6480²

= 3.96 X 10¹⁴

Expression for acceleration due to gravity

g = GM / R² where R is radius of satellite

20 = 3.96 X 10¹⁴ / R²

R² = 3.96 X 10¹⁴ / 20

= 1.98 x 10¹³ m

R= 4.45 x 10⁶ m

8 0

3 years ago

A 1600 kg car is moving north with a speed of 25 m/s. An impulse of 10,000 N-s south is applied to the car. After the impulse is

Umnica [9.8K]

Answer:

The speed of the car is 18.75 m/s

Explanation:

Impulse-Momentum Change Equation

The impulse received by an object is equal to the change in momentum:

Impulse = Change in momentum

The change in momentum is:

$\Delta p=m\Delta v=m(v_2-v_1)$

Where m is the mass of the object, v2 is the final speed, and v1 is the initial speed. This means the impulse J is:

$J=m(v_2-v_1)$

It's given an m=1,600 kg car is moving at v1=25 m/s North and then an impulse of J=-10,000 N.s is applied South. The minus sign indicates the impulse is opposite to the original direction of the velocity.

Solving for v2:

$\displaystyle v_2=\frac{J}{m}+v_1$

Substituting:

$\displaystyle v_2=\frac{-10,000}{1,600}+25$

$\displaystyle v_2=-6.25+25=18.75$

$v_2=18.75\ m/s$

The speed of the car is 18.75 m/s

5 0

3 years ago