Ask question

Ask question

All categories

3 years ago

13

3. Jeremy has a solution with a mass of 228 g. He knows that the mass of the solvent was 224 g. How much is the mass of the solu

te in the solution?

1 answer:

mariarad [96]3 years ago

3 0

228 - 224 = 4

there is 4g of solute in the solution.

You might be interested in

PLS HELP IM SOO CONFUSED!

Feliz [49]

False.

As temperature increases the more the electrons begin to vibrate more, as it decreases they vibrate less.

7 0

3 years ago

Read 2 more answers

A 4.0 m length of gold wire is connected to a 1.5 V battery, and a current of 4.0 mA flows through it. What is the diameter of t

sladkih [1.3K]

Explanation:

Given that,

Length of gold wire, l = 4 m

Voltage of battery, V = 1.5 V

Current, I = 4 mA

The resistivity of gold, $\rho=2.44\times 10^{-8}\ \Omega-m$

Resistance in terms of resistivity is given by :

$R=\dfrac{\rho l}{A}$

Also, V = IR

So,

$\dfrac{V}{I}=\dfrac{\rho l}{A}$

A is area of wire,

$\dfrac{V}{I}=\dfrac{\rho l}{\pi r^2}$ , r is radius, r = d/2 (diameter=d)

$\dfrac{V}{I}=\dfrac{\rho l}{\pi (d/2)^2}\\\\\dfrac{V}{I}=\dfrac{4\rho l}{\pi d^2}\\\\d=\sqrt{\dfrac{4\rho l I}{V\pi}} \\\\d=\sqrt{\dfrac{4\times 2.44\times 10^{-8}\times 4\times 4\times 10^{-3}}{1.5\times \pi}} \\\\d=18.2\ \mu m$

Out of four option, near option is (C) 17 μm.

6 0

3 years ago

A tool for studying motion is called?

kakasveta [241]

Answer:

phytochemical

Explanation:phytochemical is a tool for studying motion

8 0

3 years ago

(a) that the acceleration (A) will have no components that are identically zero. (B) may have some components that are identical

umka21 [38]

Answer:

D.

Explanation:

acceleration in the z component = velocity in z component / time. The question states velocity in z component is zero. Therefore, acceleration in z component = 0/time = 0.

Now the question does not specify whether the other velocity vectors (x or y) is zero or not. So its D.

4 0

2 years ago

A golfer imparts a speed of 30.3 m/s to a ball, and it travels the maximum possible distance before landing on the green. the te

sergey [27]

<u>Answer:</u>

a) Time spend by ball in air = 4.368 seconds

b) Longest hole that golfer can make = 93.59 meter

<u>Explanation:</u>

Projectile motion has two types of motion Horizontal and Vertical motion.

Vertical motion:

We have equation of motion, v = u + at, where v is the final velocity, u is the initial velocity, a is the acceleration and t is the time taken.

Considering upward vertical motion of projectile.

In this case, Initial velocity = vertical component of velocity = u sin θ, acceleration = acceleration due to gravity = -g $m/s^2$ and final velocity = 0 m/s.

0 = u sin θ - gt

t = u sin θ/g

Total time for vertical motion is two times time taken for upward vertical motion of projectile.

So total travel time of projectile = 2u sin θ/g

Horizontal motion:

We have equation of motion , $s= ut+\frac{1}{2} at^2$ , s is the displacement, u is the initial velocity, a is the acceleration and t is the time.

In this case Initial velocity = horizontal component of velocity = u cos θ, acceleration = 0 $m/s^2$ and time taken = 2u sin θ /g

So range of projectile, $R=ucos\theta*\frac{2u sin\theta}{g} = \frac{u^2sin2\theta}{g}$

a) We have golf ball travels maximum distance, so range is maximum.

Maximum range is when, sin 2θ =1

=> θ = 45⁰

Now we have travel time of projectile, t = 2u sin θ/g

Initial velocity = 30.3 m/s and θ = 45⁰

So time spend in air, t = $\frac{2*30.3*sin45}{9.81} =4.368 seconds$

b) Longest hole that golfer can make = Range of projectile = $\frac{u^2sin2\theta}{g}$

Longest hole that golfer can make = $\frac{30.3^2sin(2*45)}{9.81}=93.59 meter$

4 0

3 years ago