What is the right answer for this question is

Which projectiles will be visibly affected by air resistance when they fall?

leva [86]

Answer:

Balloon, leaf

Explanation:

Objects that are light and have a relatively large surface that Is affected by the friction with air.

8 0

3 years ago

Un neumático sin cámara, soporta una presión de 1.5 atm cuando la temperatura ambiente es de 300°K. ¿Qué presión llegará a sopor

arlik [135]

Answer:

El neumático soportará una presión de 1.7 atm.

Explanation:

Podemos encontrar la presión final del neumático usando la ecuación del gas ideal:

$PV = nRT$

En donde:

P: es la presión

V: es el volumen

n: es el número de moles del gas

R: es la constante de gases ideales

T: es la temperatura

Cuando el neumático soporta la presión inicial tenemos:

P₁ = 1.5 atm

T₁ = 300 K

$V_{1} = \frac{nRT_{1}}{P_{1}}$ (1)

La presión cuando T = 67 °C es:

$P_{2} = \frac{nRT_{2}}{V_{2}}$ (2)

Dado que V₁ = V₂ (el volumen del neumático no cambia), al introducir la ecuación (1) en la ecuación (2) podemos encontrar la presión final:

$P_{2} = \frac{nRT_{2}}{V_{2}} = \frac{nRT_{2}}{\frac{nRT_{1}}{P_{1}}} = \frac{P_{1}T_{2}}{T_{1}} = \frac{1.5 atm*(67 + 273)K}{300 K} = 1.7 atm$

Por lo tanto, si en el transcurso de un viaje las ruedas alcanzan una temperatura de 67 ºC, el neumático soportará una presión de 1.7 atm.

Espero que te sea de utilidad!

4 0

3 years ago

A force in the + x-direction with magnitude F(x) = 18.0N -(0.530 N/m)x is applied to a 6.00-kg box that is sitting on the horizo

gogolik [260]

Answer:v=8.17 m/s

Explanation:

Given

F(x)=18-0.530 x

mass of box=6 kg

distance traveled is 14 m

Work done by force

$W=\int_{0}^{14}Fdx$

$W=\int_{0}^{14}(18-0.53x)dx$

$W=\left ( 18x-\frac{0.530}{2}x^2\right )_0^{14}$

$W=252-51.94=200.06 J$

Work done by the force is equal to change in kinetic energy

$W=\frac{mv^2}{2}$

$200.06\frac{6\times v^2}{2}$

$v=8.17 m/s$

5 0

4 years ago

Lenses can be used to focus sunlight to a small point to burn paper or dry brush. A person demonstrates this using their own eye

gtnhenbr [62]

Answer:

the eyeglasses consist of a convex lenses

Explanation:

For the lenses to be used to focus light it means the lenses are a convex, because it is convex lenses that converge light towards the focal point for it to burn paper or dry bush. From this we can also deduce that the person is farsighted because convex lenses are used to treat farsightedness.

4 0

3 years ago

After brushing, Fluffy's fur has a charge of 8.0 x 10^-9 coulombs and her plastic brush has charge of -1.4× 10^-8 coulombs. If t

AlexFokin [52]

Given data:

charge 1 (q₁) = 8.0 × 10⁻⁹ coulombs

charge 2 (q₂) = -1.4 × 10⁻⁸ coulombs

distance between fur and brush (r) = 5.0 × 10⁻¹ m

We know that,

The couloumb's law describes the charge between two particles

Mathematically,

F = k.(q₁ . q₂)/r² ----------------------- (i)

Where F = Force between particles

k = constant, 8.99 × 10⁹ Nm²/C² -------------- (ii)

keep the charge, distance values and value of k in equation (i), to determine the magnitude of force

F = 8.99 × 10⁹ ×{ (8.0 × 10⁻⁹) × ( -1.4 × 10⁻⁸)} / (5.0 × 10⁻¹)²

= -4.02 × 10⁻⁶

The force is negative means "the force is attractive"

3 0

4 years ago