NEED Answer asap plz!!

Answer:

V = 15m/s

Explanation:

Given the following data;

Initial velocity = 3m/s

Time = 8secs

Acceleration = 1.5m/s²

To find the final velocity, we would use the first equation of motion;

V = U + at

Substituting into the equation, we have

V = 3 + 1.5*8

V = 3 + 12

V = 15m/s

Answer:

Either B or D. The answer itself is 2.

Explanation:

The equation for the kinetic energy would be 1/2*mv^2.

When m is doubled, we can plug in 1 and 2 to compare our answers.

Plugging in 1 for mass would give us the answer 1/2*v^2.

Plugging in 2 for mass would give us v^2. This means that the velocity was multiplied by 2, meaning that the answer is it is multiplied by 2.

I am not sure which answer is correct since there seems to be two answer choices with 2 in it, but the answer is either B or D (I will call it ABCD because I do not want to cause confusion by saying 2 multiple times).

Answer:

The power transmitted to the pulley is 0.0455 hp.

Explanation:

Given;

mass attached to the rope, m = 5 lb

radius of the pulley, r = 3 in

constant rate of fall of the mass, v = 5 ft/s

acceleration due to gravity, g = 32.2 ft/s²

1 lbf = 32.2 lb.ft/s²

The power transmitted to the pulley is calculated as;

P = Fv

P = (mg)v

[tex]P = 5 \ lb \ \times \ 32.2 \ \frac{ft}{s^2} \ \times \ 5 \ \frac{ft}{s} \ \times \ \frac{1 \ lbf}{32.2 \ lb.ft/s^2} \ \ = 25 \ \frac{ft.lbf}{s} \\\\[/tex]

in horse power, the power transmitted is calculated as;

[tex]P = \frac{25 \ ft.lbf}{s} \ \times \ \frac{1 \ hp}{550 \ ft.lbf/s} \ \ = 0.0455 \ hp[/tex]

Therefore, the power transmitted to the pulley is 0.0455 hp.

Answer:

r = 31.8

Explanation:

To start with, we make the following assumptions. Let

r be the radius of semicircular end

l be the length of straight section

a be the area inside track, then

p = 2πr + 2l = 400

a = πr² + 2rl

2πr + 2l = 400

l = 200 - πr, substituting for l in area,

a = πr² + 2r(200 - πr)

a = πr² + 400r - 2πr²

a = 400r - πr²

In order to find our minimum area, we differentiate with respect to r and then it equate to zero

da/dr = 400 - 2πr = 0

r = 200/π, substituting for r in equation for l,

l = 200 - πr

l = 0 m

And since this is not possible, l must be 100 m (the minimum), and

r = (200 - 100)/π

r = 100/π = 31.8 m

Answer:

Rhythmic Gymnastics

Explanation:

Answer:

Amplitude.

Explanation:

Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.

Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data. Some examples of communication technologies that uses radio waves are radio set, mobile phones, television etc.

For a wave, an amplitude is defined as the maximum height of a crest, or depth of a trough, relative to the normal level

Answer:

P = 510 Ns

Explanation:

Momentum is defined as the quantity of motion contained in a body. Mathematically momentum is defined as the product of mass and the velocity of the body. So in order to find out the momentum of the referee after the collision with the football player, we can use the following formula:

[tex]P = mv\\[/tex]

where,

P = Momentum of the referee after the collision = ?

m = mass of the referee = 85 kg

v = speed of the referee after collision = 6 m/s

Therefore,

[tex]P = (85\ kg)(6\ m/s)[/tex]

P = 510 Ns

Answer:

Force

Explanation:

Answer:

[tex]W_b \approx 16336J[/tex]

Explanation:

From the question we are told that

Force of pull [tex]F= 92.5[/tex]

Weight of handle [tex]W_h=27.5 kg[/tex]

Angle of handle [tex]\angle =35.0[/tex]

Distance [tex]d=215.6 m[/tex]

Generally the work done by the boy can mathematically be represented as

[tex]W_b=F*dcos \theta[/tex]

[tex]W_b=92.5*27.5 *cos(35)[/tex]

Therefore

[tex]W_b=16336.34922J[/tex]

[tex]W_b \approx 16336J[/tex]

Answer:

v = 18.5 m /s

Explanation:

The velocity of the jumper will go on increasing until his weight is more than the restoring force created in the bungle.

mg = kx

50 x 9.8 = 100 X

X = 4.9 m

Total fall = 15 + 4.9 = 19.9 m

kinetic energy gained due to fall by 19.9 m

= mgh = 50 x 9.8 x 19.9 = 9751 J

energy lost due to stored elastic energy in bungie

= 1/2 k x²

= .5 x 100 x 4.9²

= 1200.5 J

Remaining kinetic energy = 9751 - 1200.5 = 8550.5 J

1/2 m v² = 8550.5

.5 x 50 x v² = 8550.5

v² = 342

v = 18.5 m /s

Answer:

Answer d) Lab B's reading is less precise than Lab A's

Explanation:

Recall that accuracy is a measure of how close to the actual physical quantity the experiment leads to. In this case, we don't know what the true age is,so we cannot tell which reading is more accurate.

But we can tell which reading is more precise given the value of their reported errors. Since Lab A shows a smaller error in years (+/- 20 years versus 30 years), as well as a smaller percent error (3.9% versus 5.1%), we can say that Lab's A reading is more precise than Lab B's reading.

This agrees with answer labeled d).

The peripheral nervous system transfers information from the sensory neurons to the rest of the body.

The peripheral nervous system transfers information from the sensory organs organs and muscles. The axons of these nerve cells can be found throughout the body. Information is received by the dendrites of nerve cells and the information moves down the axon to the cell body.

So we can conclude that the peripheral nervous system transfers information from the sensory neurons to the rest of the body.

Lear more about nervous here: https://brainly.com/question/2114466

#SPJ2

Answer:

look it tilts and light

Answer:

Sedentary lifestyle is the lifestyle by which most physical activity is abandoned, performing activities that do not require energy consumption or large muscle movements on a large scale, such as using a computer, driving a car or playing video games.

Today, most young people have gradually turned towards sedentary lifestyles, mainly motivated by the increase in technological availability, and the extensive dependence generated on technology both to communicate with their peers (cell phones, social networks, etc. .) and for leisure time (video games, etc.).

Some ways to promote physical activity in young people and prevent sedentary lifestyle can be to create sports groups, where young people can establish social relationships without depending on networks or technological devices, or establish tasks of physical activity during study or work hours.

Answer:

13.2m

Explanation:

Step one:

given data

Energy= 5610J

Force F= 425N

Required

The distance traveled

Step two:

We know that work done is given as

WD= force* distance

so

5610=425*d

divide both sides by 425

d= 5610/425

d=13.2m

Answer:

B

Explanation:

Just answerd that question!!!

Hope it helped!!!

.

Answer:

Weight of honey required to fill bath tub  is 435kg

Honey is 1.45 times heavier than water

Explanation:

Rough volume of a bathtub is 300 litres

density of honey is 1.45 kg/L

Density of honey in bath tub is given by

[tex]\rho = \frac{mass}{volume}[/tex] where, mass is the weight of honey in bath tub and volume is volume of bath tub

on substituting the given values in above equation we get

1.45 = [tex]\frac{mass}{300}[/tex]

⇒1.45 x 300 = mass of honey in bath tub or weight of honey

⇒ weight of honey required to fill bath tub  is 435kg

density of water is 0.997 kg/L

therefore for the same amount of volume the ratio of weight of honey to water is equal to ratio of density of honey to water

∴ [tex]\frac{W_h}{W_w} = \frac{\rho_h}{\rho_w}[/tex]

on substituting the value of densities we get

[tex]\frac{W_h}{W_w} = \frac{1.45}{1}[/tex]

⇒ honey is 1.45 times heavier than water

Answer:

the answer is c

Explanation:

Answer:

Time displayed on clock at the front of car is 12:00 noon

Explanation:

According to the question the Time displayed on rear clock of the car displays 12:00 noon.

since car has maximum speed of car is 100 m/s

i.e., they does not move with relativity speed

hence there will be no time dilation in time

Therefore, Time displayed on clock at the front of car is 12:00 noon

Answer:

Gravity and Friction

Explanation:

How gravity and friction work which u probably know

Answer:

Second stone hist at 4.08 s later.

Explanation:

The second stone straight up, so we need to find the rise and descent time.

[tex]v_{f}=v_{i}-gt[/tex]

At the top, the final speed is 0 and t is the rise time.

[tex]0=20-gt_{r}[/tex]

[tex]t_{r}=\frac{20}{9.81}[/tex]

[tex]t_{r}=2.04 s[/tex]

Let's recall that the rise time is equal to the descent time.

So the total time of the stone will be

[tex]t_{t}=4.08 s[/tex]

Now, the second stone hits the street in t2 = 4.08 s + t1 s

But we just need the time after the first stone hist the street. So we just subtract the time t1 to the second time t2, which means t2 = 4.08 s.

Therefore stone hist at 4.08 s later.

The second stone hits the wall 4.08 seconds later.

To solve this question, we will use the equation of motion. In particular, the first equation of motion which states that;

v = u + at, where

v = the final velocity

u = the initial velocity

a = acceleration of gravity

t = time taken by the stone.

From the question, we're told that the stone is thrown with a speed of 20 m/s, which is the initial velocity. And a final velocity, v of 0 m/s. Using a constant of 9.81 for acceleration of the stone. We have,

0 = 20 - 9.81 × t

20 = 9.81t

t = [tex]\frac{20}{9.81}[/tex]

t = 2.039or 2.04 seconds.

Assuming that the time taken to ascent = time taken to descent, this means that the total time taken will be 2.039 + 3.039 = 4.078 seconds or 4,08 seconds.

visit https://brainly.com/question/24040430 to learn more about the first equation

Answer:

presence of salt in oceanic water makes 97 of the water on the earth unfit for drinking

Answer:

A tropical year, also known as a solar year, an astronomical year, or an equinoctial year, is, on average, approximately 365 days, 5 hours, 48 minutes and 45 seconds long.

Explanation:

Answer:

It looks like a total of 9 meters

Explanation:

the dot on the graph for 1910 sits JUST below the mark for 10 meters

Given :

A SONAR used in a ship sends ultrasound waves and receives the echo after 2.0 s.

To Find :

The depth of the shoal of fish if the speed of sound in water is 1250 m/s.

Solution :

Let, the depth of the shoal fish is d.

Now, it is given that it takes 2.0 s to receive the echo.

Also, distance covered by echo is 2d.

Now, 2d = s × t

2d =  1250 m/s × 2 s

d = 1250 m

Therefore, the depth of the shoal of fish is 1250 m.

The comet will have the most gravitational potential energy at : ( B ) Point A

Given that the gravitational potential energy between two bodies is expressed as

Ux = - GMm / d ------ ( 1 )

where :

G = gravitational constant

M = mass of larger body ( sun )

m = mass of comet

d = distance between the bodies

Therefore the greater the distance ( d ) between the bodies the less negative the potential gravitational energy the smaller body will possess. from the image attached below, the point on the orbit that is farthest from the sun is Point A

Hence we can conclude that the comet will have the most gravitational potential energy at : ( B ) Point A

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Answer: its letter c

Explanation:

Answer:

there round that's one thing

Answer:

large size, number of moons, lack solid surfaces and none are capable of supporting life.

Explanation:

Answer:

7.59Ns

Explanation:

Given parameters:

Force  = 1360N

Time of contact  = 5.85 x 10⁻³s

Unknown:

Impulse  = ?

Solution:

The impulse of the ball is given as:

        Impulse  = Force x time

       Impulse  = 1360 x 5.85 x 10⁻³ = 7.59Ns