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3 years ago

Hello, can anyone help me

Physics

1 answer:

Reptile [31]3 years ago

7 0

Answer: las esmanda

Explanation: 2/3/4

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Change into60f into c

Reil [10]

Answer:

15.6 C

Explanation:

Here we are given a temperature in Fahrenheit (F). We want to convert it into Celsius degrees (C).

The conversion can be done by using the following equation:

$T(C)=\frac{5}{9}(T(F)-32)$

where

T(C) is the temperature in Celsius degrees

T(F) is the temperature in Fahrenheit degrees

In this problem, we have

T(F) = 60 F

Therefore, by applying the equation,

$T(C)=\frac{5}{9}(60-32)=15.6 C$

8 0

3 years ago

Two blocks can collide in a one-dimensional collision. The block on the left hass a mass of 0.30 kg and is initially moving to t

snow_lady [41]

Answer:

a) 3.632 m/s

b) 0.462 m/s

Explanation:

Using the law of conservation of momentum:

$m_{1} u_{1} + m_{2} u_{2}= m_{1} V_{1} + m_{2} V_{2}$ ..........(1)

$m_{1} = 0.30 kg\\u_{1} = 2.4 m/s\\m_{2} = 0.80 kg\\u_{2} = 0 m/s$

Substituting the above values into equation (1) and make V2 the subject of the formula:

$0.3(2.4) + 0.80(0)= 0.3 V_{1} + 0.8 V_{2}\\$

$V_{2} = \frac{0.72 - 0.3 V_{1}}{0.8}$ ..................(2)

Using the law of conservation of kinetic energy:

$0.5m_{1} u_{1} ^{2} + 1.2 = 0.5m_{1} V_{1} ^{2} + 0.5m_{2} V_{2} ^{2}\\0.5(0.3) (2.4) ^{2} + 1.2 = 0.5(0.3) V_{1} ^{2} + 0.5(0.8)V_{2} ^{2}\\$

$2.064 = 0.15 V_{1} ^{2} + 0.4V_{2} ^{2}$ .......(3)

Substitute equation (2) into equation (3)

$2.064 = 0.15 V_{1} ^{2} + 0.4(\frac{0.72 - 0.3V_{1} }{0.8}) ^{2}\\2.064 = 0.15 V_{1} ^{2} + 0.4(\frac{0.5184 - 0.432V_{1} + 0.09V_{1} ^{2} }{0.64}) \\1.32096 = 0.096 V_{1} ^{2} + 0.20736 - 0.1728V_{1} + 0.036V_{1} ^{2} \\0.132 V_{1} ^{2} - 0.1728V_{1} - 1.1136 = 0\\V_{1} = 3.632 m/s$

Substituting $V_{1}$ into equation(2)

$V_{2} = \frac{0.72 - 0.3 *3.632}{0.8}\\V_{2} = \frac{0.72 - 0.3 *(3.632)}{0.8}\\V_{2} = 0.462 m/s$

8 0

3 years ago

how do scientists know that black holes exist A. by running experiments on the sun B. by observing objects and light around blac

NNADVOKAT [17]

Answer:

E. none of the above

Explanation:

I hope thats right

8 0

3 years ago

Read 2 more answers

A 6.0 kg block, starting from rest, slides down a frictionless incline of length 2.0 m. When it arrives at the bottom of the inc

erica [24]

Since
Vf^2 = 2*a*S 
Given S=3.6m, thus 
a = Vf^2/(2*3.6) 
a = Vf^2/7.2 

Let d be the distance along the slope at which the velocity is 0.5Vf, then 
(0.5Vf)^2 = 2*a*d 
or 
d = (0.5*Vf)^2/(2*a) 
with a = Vf^2/7.2, we have 
d = 0.9 m

8 0

3 years ago

What happens when a blaring siren moves away from you

Anit [1.1K]

It gets quieter as the sound waves have to travel further and so the volume decreases

4 0

4 years ago

Hello, can anyone help me ​

Hello, can anyone help me