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pickupchik [31]
3 years ago
14

What part of the electromagnetic spectrum can cause sunburn? radio waves infrared light gamma rays ultraviolet light

Physics
2 answers:
Gnoma [55]3 years ago
8 0
Ultraviolet light causes sunburn. It's also called UV rays.
padilas [110]3 years ago
7 0
It is the Ultra violet light
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Two objects of the same radius start from rest and roll without slipping down a ramp. The objects are a hollow cylinder and a so
Westkost [7]

Answer:

Solid cylinder

Explanation:

because hollow may blow and just bounce

8 0
3 years ago
The kinetic friction coefficient between a cabinet and the floor is 0.3. Mass of the cabinet is 300kg. A man pushes the cabinet
podryga [215]

Answer:

<h2>0.39m/s^2</h2>

Explanation:

Step one:

given data

mass m= 300kg

applied force F= 1000N

coefficient of friction μ= 0.3

Step two:

The net force Fn= applied force-friction force  

Fn=F-F1

F1= limiting force

F1=μ*m*g

F1=0.3*300*9.81

F1=882.9N

the Net force= 1000-882.9

Fn=117.1N

Step three:

we know that

F=ma

Fnet=ma

a= Fnet/m

a=117.1/300

a=0.39m/s^2

7 0
3 years ago
The Kentucky Derby is a 1¼ mile race. Mandaloun ran it in 1.52 minutes. Hot Rod Charlie ran at a speed of .79 miles per minute.
artcher [175]

Answer:

Mandaloun won the race.

Explanation:

First, we will calculate the time taken by the Hot Rod Charlie:

s = vt\\t = \frac{s}{v}

where,

t = time taken by Hot Rod Charlie = ?

s = distance covered = 1.25 miles

v = speed of Hot Rod Charlie = 0.79 miles/min

Therefore,

t = \frac{1.25\ miles}{0.79\ miles/min} \\t = 1.58 min

Since Hot Rod Charlie took more time (1.58 min) than the Mandaloun (1.52 min).

<u>Therefore Mandaloun won the race.</u>

6 0
3 years ago
A projectile is launched with an initial speed of 60.0 m/s at an angle of 30.0° above the horizontal. The projectile lands on a
vodka [1.7K]

Answer:

51.96 m/s^-1

Explanation:

a) see the attachment

b) As we know the velocity of the projectile has two component, horizontal velocity v_ox. and vertical velocity v_oy as shown in the figure. At the highest point of the trajectory, the projectile has only horizontal velocity and vertical velocity is zero. Therefore at the highest point of the trajectory, the velocity of the projectile will be  

v_ox=v_o*cosФ

       =60*cos (30)

      = 51.96 m/s^-1

3 0
3 years ago
Read 2 more answers
In a volcanic eruption, a 2400-kg boulder is thrown vertically upward into the air. At its highest point, it suddenly explodes i
crimeas [40]

Answer:

91.33 m towards the south

Explanation:

At the highest point , the boulder will be at rest so its velocity will be zero . When it explodes into two fragments , momentum in horizontal direction will be conserved since there is no external force in horizontal direction . So

m₁ v₁ = m₂ v₂

m₁ v₁ = 3m₁ v₂

v₁ = 3 v₂

So velocity of larger fragment will be  1 / 3  times the velocity of smaller  one , in horizontal direction , to conserve momentum.

The smaller fragment  travels a distance of 274 m horizontally in the north , the larger fragment will travel 274 / 3 or 91.33 m towards the south. It is so because time of fall for both is same , Or they travel in horizontal direction during the same time.

7 0
3 years ago
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