What is the angular position in radians of the minute hand of a clock at 2:55?

Answer: It is D.

Explanation:

Sedimentary rocks are turned into metamorphic rocks by heat and pressure is an example of chemical change.

Chemical changes are defined as changes which occur when a substance combines with another substance to form a new substance.Alternatively, when a substance breaks down or decomposes to give new substances it is also considered to be a chemical change.

There are several characteristics of chemical changes like change in color, change in state , change in odor and change in composition . During chemical change there is also formation of precipitate an insoluble mass of substance or even evolution of gases.

There are three types of chemical changes:

1) inorganic changes

2)organic changes

3) biochemical changes

During chemical changes atoms are rearranged and changes are accompanied by an energy change as new substances are formed.

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Answer:

Caffeine and stress can both elevate cortisol levels. High amounts of caffeine can lead to the negative health effects associated with prolonged elevated levels of cortisol. However, small to moderate amounts of caffeine can lift your mood and give you a boost. Caffeine can raise your heart rate and cause  extra heartbeats. And using large amounts of it for long periods can increase your risk of having a heart attack.

Explanation:

Hopefully this is right.

If you push down on a piston in a fluid, then the pressure increases uniformly throughout the fluid. Hence, option D is correct.

A piston is a part of a variety of comparable mechanisms, including reciprocating engines, reciprocating pumps, gas compressors, hydraulic cylinders, and pneumatic cylinders. It is the moving part, housed by a cylinder, and is sealed off from the atmosphere by piston rings.

The function of a piston rod and/or connecting rod in an engine is to transmit force from the expanding gas in the cylinder to the crankshaft. In a pump, the process is switched around so that force is transferred from the crankshaft to the piston in order to compress or eject the fluid in the cylinder. The piston can cover and reveal openings in the cylinder to function as a valve in some engines.

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Atwood's machine, a physics concept, is used in real world applications like the early design of elevators, analyzing parachute descent in aerodynamics, and in designing weight-based fitness equipment.

An Atwood's machine is a device used in physics to demonstrate the principle of motion. The machine consists of two objects of different masses connected by a light, inextensible cord over a frictionless pulley.

A real world application of the Atwood's machine is found in elevators. In the early design of elevators, the car was one mass and a counterweight acted as the second mass. The counterweight ensured that the elevator car could be lifted smoothly and with minimal force, embodying the motion principle demonstrated by the Atwood's machine.

The Atwood's machine can also be applied in the field of aerodynamics. A parachute carrying a load can be modeled as an Atwood's machine, helping to calculate the rate of descent.

Furthermore, in physical therapy and fitness centers, the machine's principles apply to weight-based gym equipment. Different weights on either side of the cable help determine the force required to lift them.

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Answer:

1.53seconds

Explanation:

Using first equation of motion :

V=U + at

Where final velocity (V) =+8.3m/s

Initial velocity (U) =+4.4m/s

Acceleration (a) = 0.65m/s^2

time(s)=?

V=U + at

+8.3^2 = +4.4 + 0.65 * t

Making t the subject of the formula :

Therefore, t= ( +8.3 - 4.4)/0.65 = 1.53seconds

The time interval in which the acceleration occurred is approximately 6.0 seconds.

To calculate the time interval in which the acceleration occurred, we can use the equation:

v = u + at

where v is the final velocity, u is the initial velocity, a is the acceleration, and t is the time interval.

In this case, the initial velocity (u) is 4.4 m/s, the final velocity (v) is 8.3 m/s, and the acceleration (a) is 0.65 m/s².

Substituting these values into the equation, we have:

8.3 = 4.4 + 0.65t

Solving for t, we get:

t = (8.3 - 4.4) / 0.65

t ≈ 6.0 s

Answer:

the particles are moving faster

Explanation:

As we know that diffusion means the rate of escape of gas from small opening.

So here the diffusion rate is basically related to the speed of gas molecules to escape out of the closed container.

So here rate of diffusion is given as

[tex]Rate = \sqrt{\frac{P}{\rho}}[/tex]

so it depends on pressure of gas and density of gas.

Also we know that gas molecules are loosely bounded to each other as we compare the bonding between molecules of liquid.

So here we will say that correct answer is

the particles are moving faster

You can use the weights of filled cell models to determine the rate and direction of diffusion by following these steps: weigh an empty cell model, fill the cell and weigh it again, calculate the difference in weight, divide the mass by time to calculate rate, and determine the direction based on weight change.

In order to determine the rate and direction of diffusion using weights of the filled cell models, you can follow these steps:

This method allows you to determine both the rate and direction of diffusion based on the change in weight of the filled cell models.

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The cross country runner cover distance of 347m in 134 seconds so Average speed of cross country runner is 5.53 m/s.

The total distance something has traveled is divided by the total amount of time it took to traverse that distance to arrive at its average speed. Speed is the current rate of movement of something. Average speed is the speed that a vehicle travels at on average over the course of a trip.

Average speed can not be zero. Speed is a measure of how quickly something moves over a short period of time or over a prolonged period of time.

Given Information in the question:

Distance covered by runner(d) = 347m
Time taken to cover distance(t) =134 seconds
If S is average speed then
We know that,
Average speed = Distance /time

S=347/134 m/s
S = 5.53 m/s

Therefore the average speed of cross country runner is 5.53 m/s.

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Actually in this case heat energy is being transferred. Heat energy or thermal energy is transferred from the burning of wood to the sausages for it to be cooked. The sausage is being heated by the fire and is absorbing the heat or thermal energy.

Answer:

Only at the precise moment when it has reached maximum height.

Explanation:

It's the precise moment when it accelerates downward.

If the thalamus is damaged of a person, then they can only form visual memories but not verbal memories.

Further Explanation:

The structure of a thalamus is a midline symmetrical of two halves. It is present in the brain of a vertebrate. They are present in between the cerebral cortex and midbrain. The thalamus is a part of diencephalon which in turn is a part of the forebrain. The main functions of a thalamus are:

The inputs from the receptors are received by the nuclei present in the thalamus. The sensory information is processed by it and then the information is transfer to the cerebral cortex. In this way, it acts as a gateway for the sensory impulses it receives from the various receptors. Thus, if a thalamus of an individual is damaged, then they can only make visual memories. They cannot make verbal memories.

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Answer Details:

Grade: Senior School

Subject: Biology

Topic: Thalamus

Keywords:

Thalamus, symmetrical, brain, cerebral cortex, midbrain, sensory information, receptors, sensory impulse, gateway, nuclei, sleep, diencephalon.

D) What is the optimum amount of fertilizer for continued plant growth?

Answer:

45 degrees

Explanation:

The most likely final temperature of the mixture is 45 °C

The increment in temperature adds up the thermal energy into the object. This energy is Heat energy.

Given added 50mL of water at 10°C to 50 mL of water at 80°C.

Heat lost or gained is given by Q =m Cv ΔT

Heat lost = heat gain

50 x 4.18 x (T -10)= 50 x 4.18 x (80 - T)

T-10 = 80 - T

2T = 90

T = 45°C

Thus, final temperature of the mixture is 45 °C.

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x1 =8t

x2=6t+60

x1=x2

8t=6t+60

2t=60

t=30 s

The Answer in significant figures is 3.20 meters. The full Answer is 3.201707577*10^0 meters

Explanation:

You must first convert 93.7Mhz to hz: 93.7mhz * 10^6hz/1Mhz = 9.37*10^7.

Next, since all EM waves' frequency and wavelength = the speed of light(c)(3.00*10^8m/s), insert the new frequency (hertz) into the formula below and solve for Wavelength (lambda)

c=(lambda)(hertz), manipulate the equation to solve for wavelength (lambda)

(lambda)=(C) / (hertz) ; Hertz = hz = s^-1 or 1/s

lambda = 3.00*10^8m/s / 9.37*10^7hz (^^remember hz = 1/s)

Since hz = 1/s, both of the factors have 1/s in the variables' place, so the 1/s cancels and your left with m (meters)

= 3.201707577 meters

Since the bird is initially going up, therefore upon falling form its mouth, the carrion was also going up at similar velocity of 12.8 m/s before it falls down. So calculate the distance taken during this time of momentarily going up:

(v = final velocity at the peak before it falls = 0, v0 = initial velocity = 12.8 m/s, g = gravity = 9.81 m/s^2, d is height taken)

v^2 = v0^2 - 2 g d

0 = 12.8^2 - 2 * 9.81 * d

d = 8.35 m

SO total distance it fell is:

d* = 8.35 m + 32.1 m = 40.45 m

So calculating for final velocity v (v0 = 0 since it stops at the peak before falling down):

v^2 = v0^2 + 2 g d

v^2 = 0 + 2 * 9.81 * (32.1 + 8.35)

v^2 = 793.642

v = 28.17 m/s = 28.2 m/s