All categories

3 years ago

URGENT PLEASE ANSWER THIS ASAP I WILL MARK YOU THE BRAINLIEST !!!

Physics

2 answers:

FrozenT [24]3 years ago

4 0

please mark me brainliesf if it is right

sound waves

Rudik [331]3 years ago

3 0

Sound waves is the correct answer.

You might be interested in

If the mass of Earth increased, with no change in radius, your weight would

amm1812

Answer:

Increase

Explanation:

If the mass of the earth increase, with no change in radius, one's weight would also increase considerably.

The reason for this is that, the gravitational force of attraction between the two bodies will increase.

The gravitational force of attraction between two bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
So, increasing the mass of the earth will increase the gravitational force on one's body and hence, an increase in weight.

6 0

3 years ago

Holding health care personnel to lesser standards of care in emergencies is called the _______ statue. A. Good Samaritan B. rest

Paladinen [302]

It would be A. Good Samaritan. So the "Holding health care personnel to lesser standards of care in emergencies is called the Good Samaritan statue.

3 0

3 years ago

a ball was kicked horizontally off a clif at 15m/s, how high was the cliff if the ball landed 83 m from base of the cliff

lana [24]

The ball's horizontal position $x$ at time $t$ is

$x=v_{0x}t$

The ball has initial velocity in the horizontal direction only, so $v_{0x}=15\,\frac{\mathrm m}{\mathrm s}$ . Then the time it takes for the ball to travel 83 m horizontally $t$ is given by

$83\,\mathrm m=\left(15\,\dfrac{\mathrm m}{\mathrm s}\right)t\implies t=5.5\,\mathrm s$

Meanwhile, the ball's vertical position $y$ at time $t$ , starting at the height of the cliff $h$ , is given by

$y=h-\dfrac12gt^2$

where $g=9.8\,\frac{\mathrm m}{\mathrm s^2}$ is the acceleration due to gravity. After 5.5 seconds, the ball hits the ground, so that $y=0$ when $t=5.5\,\mathrm s$ , and we use this to solve for $h$ :

$0=h-\dfrac12g(5.5\,\mathrm s)^2\implies h\approx150\,\mathrm m$

5 0

4 years ago

A Carnot engine whose high-temperature reservoir is at 620 k takes in 550 J of heat at this temperature in each cycle and gives

yarga [219]

Answer:

(a) W=217 J

(b) Tc=378K

Explanation:

For part (a)

We to calculate the mechanical work W the engine does. By knowing QC and QH can obtain the work using equation

W = IQHI — IQcl .....................eq(1)

Put given values for QH and QC into equation (1) to get

the mechanical work of the engine

W = 550 - 335

W=217 J

For part (b)

We want to determine the temperature of low temperature reservoir which means Tc

IQc|/|Qh| =TC/TH

for Tc

Tc=(IQc|/|Qh|)*TH

Now we can put values

Tc= 620K (335/ 550.1)

Tc=378K

For part (c)

Here we want to find the thermal efficiency (e) of the cycle

e=1-TC/TH

e=1-(378/620)

e=0.39=39%

6 0

3 years ago

What would you do with the force and mass to create a situation where the car has the highest acceleration possible?

olya-2409 [2.1K]

Answer:

Increase the force and/or decrease the mass

Explanation:

A = F/m per Newton's second law, so increasing the force or decreasing the mass will increase acceleration

3 0

3 years ago