All categories

3 years ago

Which SPF level should a person look for in sunscreen as part of planning a day at the beach? pls i need it now

Physics

1 answer:

slega [8]3 years ago

3 0

Hope you do well on the test and hope this helps!

You might be interested in

Iron + Hydrochloric acid --> ?

marusya05 [52]

<h3>Hydrochloric Acid- HCl</h3>

<h2><u>Solution</u></h2>

$\bold{Fe +2HCl \rightarrow FeCl _{}{ \tiny2} + H{ \tiny{2}}}$

$\therefore \bold{\fbox{{Balanced}}}$

Iron + Hydrochloric Acid $\rightarrow$ Ferrous Chloride + Hydrogen

<h2>Hope This Helps You ❤️</h2>

8 0

2 years ago

Read 2 more answers

A projectile is launched straight upwards at 75 m/s. Three seconds later, its velocity is...?

yawa3891 [41]

Answer:

V = V0 + a t

V = 75 - 9.8 * 3 = 45.6 m/s

4 0

2 years ago

A 927 g mass is connected to a light spring of force constant 5 N/m that is free to oscillate on a horizontal, frictionless trac

liraira [26]

Answer:

2.7 s

Explanation:

The period of the motion of a massless loaded spring is given by

$T = 2\pi\sqrt{\dfrac{m}{k}}$

where m is the mass of the load and k is the force or spring constant.

Using values in the question and converting to appropriate units,

$T = 2\pi\sqrt{\dfrac{927\times10^{-3}\text{ kg}}{5 \text{ N/m}}}= 2.7\text{ s}$

5 0

2 years ago

Read 2 more answers

Sixty identical drippers, each with a hole of diameter 1.00 mm, are used to water a yard. If the water in the main pipe of diame

VashaNatasha [74]

Answer:

$V = 5.30 *10^{-2} \ m^3$

$v_1 = 0.3127 \ m/s$

Explanation:

From the question we are told that

The number of identical drippers is n = 60

The diameter of each hole in each dripper is $d = 1.0 \ mm = 0.001 \ m$

The diameter of the main pipe is $d_m = 2.5 \ cm = 0.025 \ m$

The speed at which the water is flowing is $v = 3.00 \ cm/s = 0.03 \ m/s$

Generally the amount of water used in one hour = 3600 seconds is mathematically represented as

$V = A * v * 3600$

Here A is the area of the main pipe with value

$A = \pi * \frac{d^2}{4}$

=> $A = 3.142 * \frac{0.025^2}{4}$

=> $A = 0.0004909 \ m^2$

=> $V = 0.0004909 * 0.03 * 3600$

=> $V = 5.30 *10^{-2} \ m^3$

Generally the area of the drippers is mathematically represented as

$A_1= n * \pi \frac{d^2}{4}$

=> $A_1 = 60 * 3.142 * \frac{0.001 ^2}{4}$

=> $A_1 = 4.713 *10^{-5} \ m^2$

Generally from continuity equation we have that

$Av = A_1 v_1$

=> $0.0004909 * 0.03 = 4.713 *10^{-5} * v_1$

=> $v_1 = 0.3127 \ m/s$

3 0

3 years ago

What is the Density of the rock?

Sindrei [870]

Your answer is gone be 3

4 0

3 years ago