All categories

2 years ago

3. If you are playing seesaw with your younger sister who weighs

Physics

1 answer:

defon2 years ago

8 0

Answer:

move the point of the fulcrum

Explanation:

you can do this by moving yourself closer to the pivot point, or moving the sea saw so that your sister has more of the board on her side

You might be interested in

A soccer ball kicked with a force of 13.5 n accelerates at 6.5 m/s^2 to the right. what is the mass of the ball?

natita [175]

Answer:

2.08 kg

Explanation:

Newton's second law states that the acceleration of an object is proportional to the force applied to the object, according to the equation:

$F=ma$

where F is the force applied, m is the mass of the object and a its acceleration.

In this situation, the soccer ball is kicked with a force F=13.5 N and its acceleration is a=6.5 m/s^2, therefore its mass is

$m=\frac{F}{a}=\frac{13.5 N}{6.5 m/s^2}=2.08 kg$

6 0

2 years ago

Explain some of the environmental advantages and disadvantages of upward urban growth.

Lena [83]

Disadvantage: Living outside the city makes having a car almost a requirement. Businesses, schools, services, and recreational areas are all spread out at a distance, not to mention the need to commute to work.

Advantage: The cost of a house with a yard in the suburbs is often less than the cost of a condominium or quality apartment in the city.

6 0

2 years ago

Coffee is poured at a uniform rate at 20 cm3 / s into a cup whose inside is shaped like a truncated cone. if the upper and lower

Vladimir [108]

Let the cup is filled to height h after some time

now the total volume of coffee filled in the cup is given as

$\frac{2}{y} = \frac{4}{6+y}$

$2y = 6 + y$

$y = 6 cm$

now volume of the coffee will be

$V = \frac{1}{3}\pi r^2(y + 6) - \frac{1}{3}\pi 2^2 (6)$

here we know that

$\frac{r}{y+6} = \frac{2}{6}$

$r = \frac{y+6}{3}$

$V = \frac{1}{3}\pi (\frac{y+6}{3})^2(y+6) - \frac{1}{3}\pi 2^2(6)$

now we know that volume flow rate is given as

$Q = \frac{dV}{dt}$

$20 cm^3/s = \frac{1}{3}\pi (\frac{1}{9})(3(y+6)^2)\frac{dy}{dt}$

$20 \times 9 = \pi (y + 6)^2 v$

here y = 3 cm

$180 = \pi (9)^2 v$

$v = 0.71 cm/s$

so water will rise up with speed 0.71 cm/s

5 0

2 years ago

Study the diagram and calculate the effort required to balance the load

Lisa [10]

Answer:

Solution given;

load =600N

effort=?

load distance: 0.6m

effort distance;2.6m

we have

load *load distance :effort *effort distance

0.6*600=effort *2.6

360/2.6=effort

effort:138.46N

Required effort is 138.5N.

6 0

1 year ago

Which statements best describe x-rays? check all that apply. x-rays are electromagnetic waves. x-rays are longitudinal waves. x-

laiz [17]

X ray is one of the electromagnetic waves.

As per Clark Maxwell's electromagnetic theory, all the electromagnetic waves move with the velocity of light i.e c= 3×10^8 m/s

In case of electromagnetic waves,the electric field and magnetic field are perpendicular to each other as well as perpendicular to the direction of propagation.The electromagnetic waves exhibit the property of polarisation. Hence they are transverse in nature.

Hence the best statements about X- ray will be-

1- X -rays are electromagnetic waves

2-X-rays are transverse transverse waves

3- X- rays travel at the speed of light.

5 0

1 year ago

Read 2 more answers