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3 years ago

Why is a steam burn more damaging than a burn from boiling water at the same temperature?

1 answer:

4 0

The phase change (from gas to liquid) that the steam undergoes right when it touches your skin releases a lot of energy right onto your skin so it burns a ton. The boiling water would just burn you until it reaches the same temperature as your skin.

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A projectile is fired at an angle such that the vertical component of its velocity

mestny [16]

Answer:

It takes 3 seconds to reach its high point

Explanation:

Projectile Motion

In a projectile motion (or 2D motion), the object is launched with an initial angle θ and an initial velocity vo.

The components of the velocity are

$v_{ox}=v_o\cos\theta$

$v_{oy}=v_o\sin\theta$

The speed in the horizontal direction at any time t is:

$v_y=v_o\sin\theta-g.t$

The time taken to reach the maximum height is when vy=0, or:

$\displaystyle t_m=\frac{v_o\sin\theta}{g}$

We are given the y-component of the velocity, thus:

$\displaystyle t_m=\frac{30~m/s}{10~m/s^2}$

$t_m=3~s$

It takes 3 seconds to reach its high point

3 0

3 years ago

The magnetic field inside a 5.0-cm-diameter solenoid is 2.0 T and decreasing at 3.00 T/s . Part A What is the electric field str

Doss [256]

Given Information:

Diameter of solenoid = 5.0 cm

Magnetic field = B = 2.0 T

Rate of change of magnetic field = 3.0 T/s

Required Information:

Electric field strength inside the solenoid at a point on the axis = ?

Answer:

The electric field strength inside the solenoid at a point on the axis is zero.

Explanation:

From the Faraday's Law

E = -r/2 dB/dt

Where dB/dt is the rate of change of magnetic field and r is zero because the distance from the axis is zero.

Therefore, electric field strength inside the solenoid at a point on the axis is 0.

7 0

3 years ago

Make the following conversion. 50.5 cm = _____ hm

Rina8888 [55]

50.5cm= 0.00505hm Hope this helps!

3 0

3 years ago

Read 2 more answers

An astronaut landed on a far away planet that has a sea of water. To determine the gravitational acceleration on the planet's su

ra1l [238]

Answer:

Acceleration due to gravity will be $g=17.3m/sec^2$

Explanation:

We have given gauge pressure P = 3.8 atm = 3.8×101325 = 385035 Pa

Depth h = 24.3 m

Density $\rho =1000kg/m^3$

We have find the acceleration due to gravity at the surface of planet

We know that pressure is given by

$P=\rho gh$

So $385035=1000\times g\times 24.3$

$g=17.3m/sec^2$

Acceleration due to gravity will be $g=17.3m/sec^2$

4 0

4 years ago

An old iron beam was coated with an unknown metal. there is a crack on the coating and it is observed that the iron is rusting a

IgorLugansk [536]

Based on the given description above about the metal that is being used for fractures, the old metal coating that was used before was made of TIN, and now, the metal that is used to repair fractures in order to avoid further corrosion is ALUMINUM. Hope this answer helps.

3 0

4 years ago